How to properly water grow bags in living soil

Stofftöpfe richtig gießen im Living Soil - CannaSelection®
Beginner Guide

Classification

Fabric pots are often described as being particularly beginner-friendly.
This is partly true – they forgive classic overwatering mistakes better than plastic.

However, in Living Soil, a different picture emerges.

Here, it's not about avoiding waterlogging, but about maintaining a consistently active soil system. And that's precisely what makes fabric pots more challenging than many people think.

The challenge isn't in the pot itself, but in the water distribution throughout the substrate.

 

How fabric pots change things in Living Soil

Fabric pots actively intervene in two crucial areas:

1. Oxygen supply

  • Air enters the root zone through the sides
  • Roots branch more (air-pruning)
  • Microbes work more efficiently with good aeration

2. Water behavior

  • Moisture is released faster
  • Edges dry out significantly faster
  • Water distributes less "sluggishly" than in plastic

In practice, this means:

The system reacts faster – both up and down.

 

The crucial point: Even moisture

In Living Soil, it's not about how much water is in the pot, but how it's distributed.

Desired state:

  • slightly moist and active at the top
  • evenly moistened throughout the middle
  • not continuously wet at the bottom
  • oxygen available everywhere

As soon as this balance shifts, problems arise – often without immediately visible symptoms.

 

Bottom watering in fabric pots

Watering from below works technically. Water is drawn upwards by capillary action.

In practice, everything depends on the substrate and the application.

What can work well:

  • even moistening in the lower area
  • promotes deep root formation
  • no direct "tearing open" of the surface

What often happens:

  • lower zone remains too wet for too long
  • upper zone dries out
  • water does not rise evenly
  • different moisture zones develop

Especially with fabric pots, this effect is amplified because the sides additionally lose moisture.

The result is often:

too wet at the bottom
too dry at the top

And this is precisely problematic in Living Soil.

 

Why pure bottom watering is not enough

Living Soil thrives strongly in the upper layers:

  • most microbial activity takes place there
  • organic materials are broken down there
  • plant-available nutrients are created there

If this area dries out, the system loses functionality.

Therefore:

Bottom watering alone cannot stably supply the upper soil area.

 

Practical solution: Combination of top and bottom watering

The most stable method is a combination of both approaches.

Basic structure:

  • Main watering from above
  • Supplementary impulses from below
  • Keep the surface actively moist

Specifically implemented:

1. Water from above

  • ensures even distribution
  • activates the upper microbe zone
  • provides direct feedback (absorption behavior)

2. Use bottom watering selectively

  • to rehydrate the lower area
  • not continuously, but selectively
  • no standing water in the saucer

3. Keep the surface active

  • light re-moistening as needed
  • especially important for fabric pots
  • prevents "dead" top layers

 

Mulch as a must, not an option

Mulch in Living Soil is not an addition, but a central tool.

It performs several functions simultaneously:

  • reduces evaporation at the surface
  • stabilizes moisture
  • protects microorganisms from drying out
  • ensures more even water distribution

Without mulch, the surface of a fabric pot almost always dries out too quickly.

This leads to exactly the problem many try to avoid.


The most common mistake: wrong understanding of "not drying out"

Many growers react to the statement "do not let dry out" by watering too frequently or too much.

This leads to:

  • continuously wet lower zones
  • lack of oxygen
  • sluggish root growth

The correct approach is:

  • no complete drying out of the system
  • but also no permanent saturation

The substrate is allowed to dry out slightly –
it just must not biologically collapse.

 

The role of pot size

Pot size is often underestimated, but it is crucial for stability.

Small pots:

  • dry out faster
  • react more strongly to watering errors
  • have less buffer

Large pots:

  • more stable moisture distribution
  • more even microbial activity
  • better error tolerance

Especially in Living Soil:

The larger the volume, the more stable the system.

For a clear classification, it is worth taking a look at our article on pot sizes, as this lays the foundation for any watering strategy.

 

Pros and Cons at a Glance

Fabric Pots

Advantages:

  • very good oxygen supply
  • active root development
  • well suited for biological systems

Disadvantages:

  • higher evaporation
  • uneven drying (edge vs. center)
  • require active moisture management

Bottom Watering

Advantages:

  • can specifically supply the lower area
  • supports downward root development
  • reduces mechanical stress on the surface

Disadvantages:

  • no control over water distribution
  • risk of waterlogging in the lower area
  • does not adequately supply the upper microbe zone

 

Practical Classification

Tobi from CannaSelection summarizes it this way:

"Fabric pots work very well.
But only if you understand that you are no longer following a watering schedule, but managing a system."

And further:

"The problem is rarely too little water or too much water.
The problem is almost always the distribution."

 

Watering in Practice

How to actually water in Living Soil

 

Basic principle

In Living Soil, watering is not done according to a plan, but according to the state of the soil.

Nevertheless, guidance is needed.

Estimating water quantities correctly

As rough guidelines:

  • per watering: approx. 10–15% of the pot volume
  • Example:
    • 10 L pot → 1–1.5 L water
    • 20 L pot → 2–3 L water

Important:

  • water slowly, not all at once
  • work in stages (2–3 passes)
  • Goal: even moistening, no flushing

 

Watering frequency

Typical range:

  • every 2–4 days (depending on environment and pot size)

What's crucial is not the rhythm, but:

  • surface slightly moist
  • pot noticeably lighter, but not dry
  • no continuously wet bottom area

 

How to recognize the right moment

Practical indicators:

  • top 2–3 cm begin to dry out slightly
  • pot weight significantly reduced
  • plant still looks vital (don't react only when it's drooping)

 

Combination of top and bottom watering

Recommended distribution:

  • 70–80% from above
  • 20–30% from below (selectively applied)

Important here:

  • no standing water in the saucer
  • bottom watering only for short periods
  • then bring air back into the lower area


Use mulch strategically

Mulch stabilizes the entire system.

Practice:

  • cover the surface completely
  • keep it slightly moist
  • do not let it dry out

Effect:

  • less evaporation
  • more even water distribution
  • more stable microbial activity

 

Substrate Structure - The Foundation for Everything

Many watering problems are actually substrate problems.

What matters:

  • balanced ratio of:
    • structure (e.g., perlite, wood fibers)
    • water retention capacity (humus, compost)
  • no compaction
  • good capillary action

If the substrate doesn't "draw," bottom watering won't work properly either.

 

Typical Mistakes from Practice

  • too much water at once
  • continuously wet saucer
  • dry surface without mulch
  • pots too small for Living Soil
  • rigid watering schedule without observation

 

Conclusion

Fabric pots are not complicated –
but they are also not as simple as often claimed.

In Living Soil, it's not the quantity of water that matters, but the balance:

  • even moisture
  • active surface
  • no persistently wet bottom area

The combination of:

  • top watering
  • targeted bottom watering
  • mulch
  • appropriate pot size

leads to a stable system.

Everything else will sooner or later create imbalances in the soil.

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