Setup

Potting soil (up to 20 liters)

A pot with up to 20 liters of soil volume is severely limited and offers only restricted biological stability. This setup is more organic cultivation than true Living Soil.

Setup Focus

What makes this setup unique

A pot with up to 20 liters of soil volume is one of the most commonly used setups, but from a living soil perspective, it is clearly limited. Due to the small substrate volume, the system lacks the necessary biological buffering to maintain stable processes in the long term.

Microorganisms, nutrient cycles, and water distribution react significantly faster to fluctuations in small pots. This means that deficiencies, blockages, or overreactions occur more frequently and quickly than in larger systems.

Even if organic fertilization and microbes can be used here, in practice it is usually not a full-fledged living soil system, but rather organic cultivation with biological elements.

This setup is well suited for smaller grows, but it is significantly more demanding to manage. Those who work here must pay particular attention to balance, water management, and moderate interventions. In such setups, unbalanced irrigation water can quickly lead to CalMag problems, which can be better buffered in systems with larger soil volumes.

Important for this setup

In this setup, soil volume, buffering capacity, water management and the stability of soil life play a particularly large role. The smaller the volume, the faster imbalances occur.

The benefits of this setup

Space-saving setup
Quickly responding system
Good for small projects or limited space
Direct control over changes
Lower material usage

Common mistakes in this setup

Expectation that it functions like true living soil
Overly aggressive fertilization in a small volume
Overwatering or extreme dry cycles
Too little focus on soil structure and aeration
Detecting deficiencies too late or misinterpreting them

Comprehensive Strategy

Improve nutrient storage and soil structure

This strategy is suitable when soil degrades too quickly, retains water and nutrients poorly, or generally lacks structure and storage capacity. It is not an acute measure but a systemic improvement for more resilient living soil setups.

Immediate solution

Gently push nitrogen

This strategy is ideal if the plant becomes paler during growth, new growth is smaller, or the plant appears “empty” too early overall. The goal is not a harsh nitrogen boost, but a gentle, microbe-friendly replenishment, which brings back color, leaf mass, and growth.

Immediate solution

Biologically activate the root zone after repotting

This strategy is suitable when plants have been recently repotted or a new root zone needs to be biologically colonized more quickly. The goal is to ensure a smoother, faster start in the new substrate with better root integration.