Plant layers, guilds and species compatibility

Plant layers, guilds and species compatibility

Forest garden as a spatial network of interactions

A sustainable forest garden is built not from individual trees, but from interconnected plant communities.

Each plant occupies a specific place:

by height;

by root depth;

in relation to light;

according to moisture needs;

by flowering time;

according to the fruiting season;

by the method of obtaining nutrients;

by function within the ecosystem.

A properly designed system utilizes space not only above ground, but also vertically, underground, and over time.

Different species should not constantly compete for the same resource. Their functions, sizes, and life cycles should complement each other whenever possible.

The main principle of DREVO:

Plant compatibility is determined not by the similarity of their names or traditional plant neighborhood tables, but by the compatibility of their environmental needs, sizes, root systems, life cycles, and functions.

1. Three dimensions of a forest garden

The forest garden develops simultaneously in three dimensions.

Vertical dimension

Plants occupy different altitude levels:

tall trees;

medium trees;

low trees;

shrubs;

herbs;

ground cover plants;

vines.

This allows for more efficient use of sunlight and space.

Underground dimension

The roots are located at different depths:

superficial;

fibrous;

rod;

deep woody;

rhizome;

tuberous;

bulbous.

Root diversity reduces direct competition and helps to exploit different soil horizons.

Time dimension

Plants develop and bear fruit at different times.

The following may be present simultaneously in one system:

annual crops;

fast growing pioneers;

medium-term shrubs;

young fruit trees;

long-lived nut-bearing plants;

old heirloom trees;

natural undergrowth.

This way, the forest garden maintains its productivity during the change of plant generations.

2. Tiering as a natural principle

Layering is typical for many natural forests.

It allows:

distribute sunlight;

create different levels of humidity;

reduce wind speed;

to form a variety of ecological niches;

increase the total photosynthetic surface;

support birds, insects and other animals;

reduce soil openness;

increase resistance to weather fluctuations.

However, the maximum number of tiers is not an end in itself.

In dry, cold or low-fertility areas, an overly dense tiered system can lead to:

lack of water;

poor ventilation;

development of diseases;

oppression of fruit crops;

excessive competition;

fire hazard.

The number and density of tiers are determined by the bearing capacity of the territory.

3. High tree layer

The high tier forms the main climatic framework of the forest garden.

It may include:

large nut-bearing trees;

long-lasting fruit varieties;

forest-forming local trees;

woody forage crops;

protective and soil-improving species;

trees for timber;

hereditary trees.

High-level functions

Tall trees:

slow down the wind;

create a diffuse shadow;

intercept precipitation;

reduce overheating;

form deep root canals;

raise water and mineral elements;

create leaf litter;

serve as a habitat for birds;

connect the forest garden with the surrounding landscape;

accumulate carbon;

determine the long-term structure of the territory.

High Tier Restrictions

It is necessary to take into account:

future height;

crown diameter;

shadow density;

wood strength;

risk of falling branches;

root power;

distance to buildings;

shading of productive zones;

fire safety.

Tall trees are designed with a lifespan of at least 50–150 years.

4. Middle tree layer

The middle tier is usually the main fruit-bearing level of the forest garden.

It may include:

apple trees;

pears;

plums;

cherries;

cherries;

apricots;

peaches;

persimmon;

pomegranate;

figs;

mulberry;

citrus;

other regionally suitable crops.

Functions of the middle tier

production of the main crop;

formation of partial shadow;

waste creation;

support for pollinators;

development of fungal connections;

protection of shrubs and grasses;

formation of internal microclimate.

When selecting, the following are taken into account:

growth force;

rootstock type;

crown shape;

self-fertility;

need for pollinators;

flowering time;

winter hardiness;

susceptibility to diseases;

ability to tolerate partial shade.

5. Low tree layer

The low tree layer occupies the space between medium-sized trees and shrubs.

It may include:

dwarf fruit forms;

low trees;

bush-like woody crops;

young trees of the future middle tier;

shade-tolerant fruit species;

plants on dwarf rootstocks.

This tier is especially useful:

near the paths;

in small economic zones;

near heavily used areas;

where convenient manual collection is required;

on the edges of forest clearings.

It's important to remember that a low-growing tree isn't always more resilient. Many dwarf varieties have weak root systems and require support, watering, and constant care.

6. Shrub layer

Shrubs connect the tree canopy with the grass level.

They can perform food, protective and ecological functions.

Productive functions

berries;

walnuts;

medicinal raw materials;

spices;

tea raw materials;

animal feed;

material for processing.

Ecological functions

soil protection;

creation of undergrowth;

bird shelter;

pollinator nutrition;

slope strengthening;

formation of hedges;

wind slowdown;

snow accumulation;

creation of leaf litter.

Shrubs can be:

light-loving;

shade-tolerant;

moisture-loving;

drought-resistant;

prickly;

nitrogen-fixing;

evergreen;

deciduous.

High shrub density should not impede access, ventilation and natural regeneration of trees.

7. Herbaceous layer

The herbaceous layer is one of the most dynamic levels of the forest garden.

It includes:

perennial vegetables;

medicinal plants;

aromatic herbs;

spices;

honey plants;

forage crops;

plants for mulch;

biological storage facilities;

deep-rooted species;

plants for remediation.

Main functions

Herbaceous plants can:

protect the soil;

feed pollinators;

accumulate organic matter;

improve soil structure;

create a quick harvest;

suppress some unwanted plants;

attract beneficial insects;

use temporarily free space;

participate in restorative succession.

The herbaceous layer must be designed taking into account that illumination will decrease as the trees grow.

Light-loving crops are gradually moving to clearings and edges, while shade-tolerant plants remain under the trees.

8. Soil cover layer

Groundcover plants create a living surface covering.

They perform the following functions:

protection from rain impacts;

reducing evaporation;

temperature regulation;

preventing crust formation;

organic production;

creating an environment for soil organisms;

suppression of some weeds;

slope stabilization.

Ground cover species can be:

low perennials;

creeping shrubs;

legumes;

shade-tolerant forest plants;

aromatic herbs;

fast-growing temporary crops.

Requirements for groundcover plants

They should not:

completely block air access to the root collar of trees;

compete excessively with young seedlings;

become uncontrollably aggressive;

hinder natural regeneration;

create a continuous dry fire mass.

In the first years, a loose mulch circle can be maintained around young trees.

9. Underground and root crop layer

The underground layer includes plants whose main economic or ecological organs are located in the soil.

These could be:

roots;

tuber crops;

bulbous plants;

plants with strong taproots;

species with a deep system of accumulation of substances.

Functions

food production;

biological loosening;

use of deep horizons;

accumulation of organic matter;

creation of channels after the roots die off;

soil stabilization;

transfer of elements to the upper layers through plant matter.

When harvesting root crops, it is important not to constantly destroy the soil structure around the trees.

Intensively dug crops are best placed:

in separate beds;

in young light guilds;

along the edges;

along the paths;

in regular care areas.

10. Layer of vines

Vines use vertical space, supports, trellises or trees.

They can produce:

fruit;

berries;

seeds;

medicinal raw materials;

green mass;

feed;

decorative coating.

Possible supports

individual trellises;

pergolas;

utility buildings;

dry trunks;

special support trees;

strong hedges.

The use of fruit trees as supports is only permissible under constant supervision.

Some vines are capable of:

overload the crown;

break branches;

overshade the leaves;

make pruning difficult;

retain excess moisture;

compete for water.

Therefore, valuable fruit trees should generally not become accidental supports for aggressive vines.

11. Mushroom layer

Fungi form a separate functional level, although most of their organism is located in the soil or wood.

Mycorrhizal fungi

Associated with living plant roots.

They can:

expand the water absorption zone;

help obtain phosphorus and other elements;

participate in metabolism;

increase plant resistance to stress;

bind soil aggregates.

Saprotrophic fungi

Decompose:

leaves;

wood;

plant residues;

dead roots.

They return substances to the cycle.

Cultivated edible mushrooms

Can be grown on:

wooden logs;

stumps;

chip;

straw;

special substrates.

Mushroom production must be compatible with sanitary requirements and must not introduce hazardous or unwanted organisms.

12. Aquatic and coastal layers

Reservoirs create a separate group of ecological niches.

They may contain:

underwater plants;

floating species;

shallow water plants;

coastal grasses;

moisture-loving shrubs;

trees of damp places.

Functions of aquatic vegetation

water purification;

nutrient binding;

coastal protection;

creating an environment for amphibians;

reduction of water overheating;

insect support;

biomass production;

formation of a humid microclimate.

It is necessary to prevent small bodies of water from becoming completely overgrown with one aggressive species.

13. What is a plant guild?

A guild is a designed community of plants, fungi, microorganisms, and sometimes animals, united around a central element.

The central element can be:

fruit tree;

nut tree;

group of trees;

water;

compost area;

protective strip;

greenhouse;

place where animals are kept.

The Guild is designed so that its members:

did not create critical competition;

occupied different tiers;

used different root horizons;

provided several ecological functions;

supported the central culture;

created products in different seasons.

14. The main functions of plants in the guild

Central productive species

The main tree or shrub for which the guild is created.

His needs become the starting point for the design.

Nitrogen-fixing plants

Some plants interact with microorganisms that are capable of fixing atmospheric nitrogen.

They can be used as:

trees;

shrubs;

herbs;

cover crops.

Their presence does not automatically mean that neighboring plants are supplied with large amounts of nitrogen.

Substance transmission depends on:

trimmings;

root death;

decomposition of leaves;

work of microorganisms;

general structure of the soil.

Nitrogen fixers support the system, but do not replace a complete organic cycle.

Dynamic storage

This is the name given to plants that are capable of forming deep roots and accumulating significant amounts of minerals in their leaves and stems.

After:

trimmings;

dying off;

composting;

use as mulch

some of the substances return to the top layer of soil.

The term "dynamic accumulator" does not mean that any deep-rooted plant is guaranteed to extract a deficient element in useful quantities. This function must be confirmed by biomass and soil analysis.

Mulching plants

They create large amounts of organic matter.

They can:

mow regularly;

used as green mulch;

form leaf litter;

nourish soil biota;

cover the surface.

It is important to prevent the formation of a dense wet layer directly at the root collar of the tree.

Plants for pollinators

Provides flowering in different seasons.

It is desirable for the guild to have:

early spring flowers;

main season plants;

late autumn honey plants;

species with different flower shapes;

Native plants for specialized pollinators.

Plants for beneficial predatory insects

Nectar and pollen are needed not only by bees.

Flowering plants support:

butterfly;

golden-eyed;

predatory wasps;

ladybugs;

other pest-regulating organisms.

Groundcover plants

Creates living mulch and protects the surface.

Repellent plants

Some aromatic species can alter the behavior of individual insects or mask the odor of crops.

However, they do not form a guaranteed protective wall.

Their role is auxiliary. They operate only as part of a larger system:

diversity;

sanitation;

resistant varieties;

natural enemies;

observations.

Trap plants

May attract pests more than the main crop.

Such plants require regular monitoring, otherwise they become a breeding ground for pests.

Plants for biological loosening

Possess:

powerful taproots;

developed root system;

ability to penetrate compacted horizons.

After their death, channels remain for:

water;

air;

new roots;

soil organisms.

Protective plants

Form:

wind protection;

barbed wire fencing;

shadow screens;

salt protection strips;

slope stabilization;

fire buffers.

15. Basic structure of the fruit tree guild

The following may be located around a fruit tree:

Central fruit tree.

Compatible pollinator.

One or more berry bushes.

Nitrogen-fixing plants.

Deep-rooted herbs.

Flowering honey plants.

Soil cover layer.

Plants for mulch.

Mushroom zone.

Temporary annual crops.

However, a guild does not have to contain all possible functions at the same time.

The composition depends on:

age of the tree;

fertility;

amount of water;

lighting;

available space;

climate;

intensity of care.

16. Guild development over time

The guild changes as the central tree grows.

Young Guild

Features:

very worldly;

open soil;

small volume of roots;

need for watering;

the need to protect the seedling.

Possible:

annual crops;

flowering herbs;

ground cover plants;

temporary nitrogen fixers;

mulching crops.

A guild in formation

The tree creates partial shade.

Gradually:

light-loving annuals are reduced;

shade-tolerant plants are increasing;

the shrub layer develops;

the fungal system is formed;

litter accumulates.

Mature Guild

Features:

developed crown;

permanent bedding;

internal circulation of organic matter;

stable soil cover;

less free light;

natural regeneration of individual species.

The guild is not an immutable structure. It undergoes its own succession.

17. Compatibility of species

Compatibility is the ability of organisms to exist side by side for a long time without critical suppression and, if possible, to mutually support the system.

It is assessed based on several groups of factors.

Climate compatibility

Plants must be adapted to:

minimum and maximum temperatures;

duration of the season;

amount of precipitation;

air humidity;

wind load;

snow;

late frosts;

heat.

Light compatibility

Types can be:

light-loving;

tolerating partial shade;

shade-tolerant.

It is necessary to take into account not only current lighting, but also the shade of mature crowns.

Water compatibility

It is not advisable to combine plants with radically different requirements in one local area:

moisture-loving and drought-resistant;

requiring constant watering and sensitive to over-watering;

coastal and steppe.

In one forest garden such species can exist, but in different hydrological microzones.

Soil compatibility

The following are taken into account:

acidity;

mechanical composition;

drainage;

organic content;

carbonate content;

salinization;

soil depth;

the presence of individual elements.

Root compatibility

Evaluated:

root depth;

distribution width;

rate of soil development;

presence of root suckers;

aggressiveness of rhizomes;

sensitivity to damage;

competition for surface moisture.

Phenological compatibility

Phenology describes the seasonal timing of development.

The following are taken into account:

unfolding of leaves;

bloom;

fruiting;

November;

period of rest.

Compatible terms allow:

distribute the harvest;

support pollinators;

reduce seasonal load;

use spring light before the crowns open.

Biochemical compatibility

Some plants secrete substances that can influence the germination and development of neighboring species.

This phenomenon is called allelopathy.

Allelopathic effects depend on:

of a specific type;

quantities of plant material;

soil conditions;

work of microorganisms;

humidity;

distances;

stages of decomposition of residues.

The presence of allelopathic substances does not mean that a plant cannot be used in a forest garden. It is necessary to identify susceptible crops and ensure appropriate spacing.

Phytosanitary compatibility

Plants may have in common:

pests;

fungal pathogens;

bacterial diseases;

viruses;

intermediate hosts of pathogens.

Planting closely related crops in large, dense groups increases the risk of overall damage.

Economic compatibility

Plants must be compatible not only biologically, but also with human work.

The following are taken into account:

collection deadlines;

need for pruning;

access to harvest;

passage of equipment;

fall of large fruits;

thornyness;

toxicity;

grazing opportunity;

Sanitation requirements.

18. Types of plant interactions

Neutral neighborhood

Plants exist side by side without having any noticeable positive or negative impact.

Such a neighborhood is normal and does not require an artificial search for special mutual benefit.

Complementarity

Plants use:

different tiers;

different root horizons;

different seasons;

different sources of resources.

This is one of the most reliable types of compatibility.

Facilitation

One plant improves conditions for another.

For example:

creates a shadow;

protects from the wind;

accumulates organic matter;

maintains soil moisture;

forms a support;

improves the microclimate.

Competition

Occurs due to:

world;

water;

power elements;

space;

pollinators;

access to air.

Competition is natural and cannot be completely eliminated.

The design goal is not to remove it, but to prevent it from reaching a critical level.

Suppression

One species significantly worsens conditions for another through:

dense shadow;

aggressive roots;

rapid growth;

allelopathic substances;

physical strangulation;

transfer of common diseases.

19. The fallacy of universal adjacency tables

Popular tables of "good" and "bad" neighbors often oversimplify reality.

The same species may behave differently depending on:

climate;

varieties;

rootstock;

soils;

distances;

watering;

age;

density;

microbiome;

care.

Therefore, the compatibility table can only be used as a preliminary hypothesis.

The decision is made on the basis of:

environmental characteristics;

scientific data;

local experience;

observations;

small test landings.

20. Root space

The above-ground diagram does not show the actual area occupied by the plant.

The roots of a mature tree can extend far beyond the projection of the crown.

The following are taken into account when designing:

diameter of the future crown;

estimated root zone;

depth of active absorption;

position of water supply and drainage;

foundations;

road surface;

neighboring trees;

underground communications.

Roots don't always grow symmetrically. They concentrate where they are available:

water;

air;

organic matter;

suitable temperature.

21. Competition between young trees and grass

Dense grass cover is beneficial for mature soils, but can compete strongly with young trees for:

moisture;

nitrogen;

surface space.

In the first years it is recommended:

maintain the mulched circle;

do not allow dense turf to form around the trunk;

use low-growing compatible groundcover plants;

regulate grass by mowing;

gradually expand the living cover as the tree becomes established.

Do not apply mulch directly to the trunk. This increases the risk of:

bark damage;

rotting;

development of diseases;

rodent shelters.

22. Compatibility of fruit trees and pollination

Many fruit crops require cross-pollination.

For each variety it is necessary to establish:

self-fertility;

compatible pollinator varieties;

coincidence of flowering periods;

distance between trees;

availability of suitable insects;

ploidy and genetic characteristics, if they are significant for the crop.

It's not enough to plant two trees of the same species. Their varieties can:

bloom at different times;

be genetically incompatible;

have sterile pollen;

do not ensure complete pollination.

A pollination plan is drawn up separately for each main crop.

23. Related species and common diseases

Planting large numbers of related plants can create a continuous supply of common pests and pathogens.

For example, crops of the same botanical family may have:

similar diseases;

common insects;

the same nutritional requirements;

similar sensitivity to soil problems.

Therefore, it is recommended:

do not create excessively large homogeneous blocks;

separate them by other functional groups;

use different varieties;

provide ventilation;

conduct regular monitoring;

maintain sanitary distances when necessary.

Botanical kinship doesn't always mean incompatibility. It does mean considering shared risks.

24. Allelopathy

Allelopathy is the chemical influence of a plant on other organisms through:

root secretions;

leaves;

fruit;

waste;

decaying wood;

volatile substances.

The impact may be:

overwhelming;

neutral;

stimulating;

concentration dependent.

If severe allelopathy is suspected, the following are used:

increased distance;

separate zones;

collection of excess litter;

selection of stable neighbors;

experimental sites;

soil analysis and observation.

A plant should not be declared incompatible with all crops simply because of the presence of certain biochemical compounds.

25. Crown size and density

Compatibility of the upper tiers is determined not only by the height, but also by the shape of the crown.

Crowns are:

narrow;

sprawling;

crying;

pyramidal;

openwork;

dense;

evergreen;

deciduous.

The openwork deciduous crown can let in enough light to the undergrowth.

The dense evergreen crown creates deep year-round shade and changes:

temperature;

humidity;

litter acidity;

air movement.

Under such a tree, a special selection of shade-tolerant species is required.

26. Light distribution

Light in the forest garden is distributed according to the types of spaces:

Full sun

Suitable for:

most fruit crops;

vegetables;

light-loving herbs;

many berries.

Partial shadow

Suitable for:

parts of shrubs;

medicinal plants;

wild berries;

some perennial vegetables;

young trees in need of protection.

Deep shadow

Suitable for a limited range of species.

The following may prevail here:

forest groundcover;

ferns;

mushrooms;

shade-tolerant ornamental and medicinal plants.

The productivity of most fruit crops decreases in deep shade.

27. Marginal zones

The boundary between forest and open space is particularly productive.

At the edge of the forest the following are combined:

sunlight;

wind protection;

wood litter;

diversity of insects;

space for shrubs;

convenient access.

The edge may include a gradual transition:

tall trees → medium trees → shrubs → tall grasses → low cover → open meadow.

A sharp vertical forest wall is more exposed to wind loads.

28. Guilds by type of central culture

Fruit Tree Guild

Main focus:

pollination;

soil nutrition;

grass control;

support of beneficial insects;

convenient collection.

Nut Tree Guild

The following are taken into account:

large crown;

long lifespan;

deep roots;

significant shadow;

features of litter;

falling of heavy fruits.

Berry Bush Guild

Basic needs:

suitable acidity;

bird protection;

regular collection;

growth control;

sufficient humidity.

Liana Guild

Requires:

strong support;

good lighting;

access for trimming;

mass control;

compatibility with a supporting plant.

Reservoir Guild

Unites:

coastal plants;

aquatic species;

moisture-loving shrubs;

pollinators;

amphibians;

plants for water filtration.

29. Guilds for environmental functions

Windproof Guild

It consists of several high levels.

It includes:

stable tall trees;

medium trees;

shrubs;

grass cover.

It must be sufficiently permeable to air.

Soil Restoration Guild

Main functions:

deep loosening;

accumulation of organic matter;

nitrogen fixation;

surface protection;

development of fungi;

reduction of erosion.

Pollination Guild

Provides continuous flowering and insect habitat.

Anti-erosion Guild

Includes plants:

with fibrous roots;

with deep roots;

capable of fixing the surface;

resistant to temporary flooding or drought.

Coastal Filtering Guild

Delays:

soil particles;

organic contaminants;

excess nutrients;

surface runoff.

It does not replace technical treatment of toxic wastewater.

Fireproof Guild

Includes:

types with lower flammability;

plants with high moisture content;

low manageable cover;

deciduous trees;

access to water.

Even such plants are not completely fireproof.

30. Temporary and permanent framework plants

In the forest garden the following are distinguished:

Permanent plants

They form a system for decades and centuries:

long-lived trees;

main fruits;

nut-bearing;

natural forest-forming species;

permanent protective strips.

Temporary plants

Used in the early stages:

fast growing pioneers;

temporary nitrogen fixers;

annual crops;

plants for mulch;

temporary protective shrubs;

fast-growing trees for shade.

For each temporary plant, the following is determined in advance:

period of use;

conditions of removal;

pruning method;

possibility of turning into mulch;

place in the subsequent succession.

31. The principle of controlled thinning

Young plantings are sometimes created denser than the mature structure.

This allows you to:

close the soil;

create organics;

protect the territory;

create a microclimate;

obtain early biomass.

But the project must provide for thinning.

The removed plants can be used as:

wood chips;

supports;

fuel;

building material;

mushroom substrate;

feed;

compostable mass.

Thinning is carried out gradually so as not to cause abrupt:

overheating;

wind increase;

drying;

weed growth;

damage to the remaining trees.

32. Polyculture and controlled groups

High diversity does not mean a chaotic mixture of all species.

Completely random landing complicates:

collection;

care;

pruning;

observation;

protection;

varietal identification;

mechanization.

Therefore, a forest garden can combine:

functional guilds;

small varietal groups;

mixed stripes;

productive fields;

natural kernels;

experimental plots;

more regular economic zones.

The structure must be ecologically diverse and at the same time easy to manage.

33. Compatibility Matrix

An evaluation matrix is ​​used to design each pair or group of species.

For each criterion, compatibility can be assessed as:

high;

acceptable;

conditional;

low;

unknown.

Unknown compatibility requires testing, not automatic resolution.

34. DREVO plant card

A separate card is created for each species or variety.

Identification

official Name;

local name;

Latin name;

family;

variety;

rootstock;

origin of the material.

Spatial parameters

height;

crown width;

growth rate;

crown shape;

root depth;

type of root system.

Environmental requirements

climate;

frost resistance;

heat resistance;

world;

water;

soil;

acidity;

salinization;

wind resistance.

Biological characteristics

lifespan;

beginning of fruiting;

bloom;

pollination;

reproduction;

natural regeneration;

diseases;

pests.

Functions

food;

feed;

honeysuckle;

nitrogen fixation;

mulch;

medicinal raw materials;

wind protection;

soil stabilization;

wood;

animal support.

Restrictions

toxicity;

invasiveness;

allelopathy;

thornyness;

fragility;

aggressive roots;

fire load;

legislative restrictions.

35. Tier design table

36. Table of the functional composition of the guild

37. Test Guilds

Before the mass introduction of new combinations, small pilot areas are created.

Compared:

various ground cover plants;

mulching methods;

shrub density;

pollinator options;

different rootstocks;

herbal combinations;

reaction to partial shadow;

water consumption;

disease resistance.

For each experiment the following are recorded:

landing scheme;

date;

composition;

distances;

soil conditions;

watering;

weather events;

height;

harvest;

diseases;

labor costs.

A successful combination must prove its sustainability over several seasons.

38. Compatibility Monitoring

Compatibility is assessed not just once before planting, but throughout the entire life of the plants.

Signs of an unfavorable combination:

one-sided oppression;

crown deformation;

a sharp decrease in growth;

lack of light;

constant drying out;

development of common diseases;

poor fruiting;

excessive growth of one species;

inability to access;

damage to roots and structures.

Possible solutions:

pruning;

transplantation of young plants;

thinning;

irrigation change;

replacement of ground cover species;

creation of a root barrier;

plant division;

removal of the aggressive element.

39. The principle of minimal sufficient complexity

The forest garden should be diverse, but manageable.

A system that is too simple becomes vulnerable.

An overly complex system can become:

incomprehensible;

labor-intensive;

poorly controlled;

inconvenient for collection;

economically unstable.

Therefore, each guild must contain not a maximum, but a minimum number of elements sufficient to perform the necessary functions.

Instead of dozens of random species, it is better to use a few well-selected plants whose interactions are clear and tested.

40. Final DREVO model

The plant architecture of a sustainable forest garden is built through a combination of:

**vertical tiering

diversity of roots

temporary change of generations

functional guilds

environmental compatibility

genetic diversity

pollination

soil biota

managed competition

constant surveillance.**

Compatibility does not mean absence of competition.

It means that competition does not destroy the system, and the differences between organisms allow them to share space, water, light and time.

The final principle

A good guild isn't a group of plants that are supposedly friends. It's a proven spatial and functional system in which each member has a clear place, doesn't pose a critical risk, and helps the forest garden achieve its ecological, food, and economic goals.

The sustainability of a forest garden is not created by the number of planted species, but by the quality of the connections between them.