Switching from mineral feeding to Living Soil

If you want to switch from mineral feeding to Living Soil, the main change is how you plan plant nutrition. Instead of controlling each nutrient application mainly through irrigation water, you build a growing medium that stores nutrients, supports biological processes and can remain useful over a longer period.

You do not have to throw away all your existing materials or change an established crop overnight. We explain which principles change, what you can reuse and how to prepare a manageable first cycle. This guidance applies to organic container media and beds, from broccoli to a cannabis grow.

From individual feeding decisions to the whole root environment

A grow supplied with mineral nutrients also needs a suitable medium, healthy roots and good watering management. Living Soil puts even more emphasis on these foundations. The mix does more than hold the plant upright. It also stores water and nutrients and provides a habitat.

The practical question changes. Alongside “What does the plant receive today?” you now ask “Which reserves and conditions will this medium need over the coming weeks?” A suitable starting mix and well-timed additions take on a larger part of the nutrition plan. Regular care still matters. Living Soil does not function independently of plant demand, light or water.

For an overview, start with Living Soil explained. Here we focus on the decisions involved in making the switch.

The plant still needs available nutrients

Switching systems does not change a plant's metabolism. Roots absorb many nutrients as dissolved ions. Nitrogen, for example, is taken up mainly as nitrate or ammonium. The main differences concern how those nutrients become available, their concentration and the speed of replenishment. Colorado State University's explanation of plant nutrition describes this distinction.

For organically bound nutrients, soil organisms first need to break down material and release nutrients. This mineralisation depends on temperature, moisture and oxygen, among other factors. The German Federal Information Centre for Agriculture explains these relationships. A different fertiliser alone therefore cannot compensate for a mix that is dry or persistently waterlogged.

“Organic” also does not mean that every ingredient acts slowly or that excess nutrition is impossible. Nutrients that are already available count alongside those released later. We therefore plan around a supply that suits the starting materials, rather than the longest possible ingredient list.

Previous mineral fertiliser use is not, on its own, proof that a medium is biologically dead. Some fertilisers and high levels of exposure can affect soil organisms; pH changes and a lack of organic food also matter. The University of Minnesota describes these different influences on soil life. What matters is the present condition of your mix.

What you can reuse from your previous grow

Start with an inventory. Record the base medium, existing fertilisation, previous amendments, irrigation water and any noticeable problems. An unidentified remainder in a bag is not a dependable basis for a new recipe.

• Used growing medium: Reuse may be possible if there are no relevant root diseases and its structure and condition are suitable. Look for compaction, poor water absorption, unpleasant smells and possible salt accumulation. These observations do not replace an analysis.
• New pre-fertilised potting mix: Include its existing reserves in your plan. Adding another full base fertilisation may be excessive. Check the product information rather than treating the mix as an unfertilised base.
• Perlite, pumice and similar structural materials: These do not become unusable because they were previously in a mineral-fed system. Particle size, condition and proportion still need to suit the new mix.
• Coir and other base components: Consider water retention, preparation and previous use. A handful of compost does not automatically turn coir into a fully supplied Living Soil mix.
• Mineral fertilisers and meters: You do not have to discard usable products. However, separate the old feeding plan from the new recipe. Meters remain useful, but only answer the question that their particular measurement method is suited to.

NC State Extension discusses reusing container media and its limits. Organic components can break down over time and lose pore space. Previous mineral feeding is therefore not the only or most important point to check.

If the history is unclear or you suspect excessive nutrient levels, a suitable growing-medium analysis is more useful than automatic flushing. Ask the laboratory specifically for a test suited to your medium. An EC reading measures dissolved salts under the particular test method. It does not measure the entire organic nutrient reserve or the biological performance of the medium.

The simplest start is a planned new cycle

We recommend preparing the change for your next fresh start where possible. You can then combine the base material, nutrient supply and structural components evenly. You do not have to preserve an existing root ball while trying to mix a new medium thoroughly.

Simply switching an established crop that relies on regular nutrient solution to water alone is not a dependable transition. Finish the previous cycle with nutrition suited to its needs. If you want to change during a cycle, you need a plan that accounts for actual reserves, the remaining crop time and additional nutrient release. A universal transition dose would be misleading.

For a fresh start, first select the container or bed and a suitable base mix. Small containers respond more quickly to drying and moisture fluctuations. Larger volumes provide more room for error, but do not fix poor structure. There is no magic volume above which watering and nutrition planning stop mattering.

The actual recipe options are in mixing your own Living Soil. Choose a suitable option as a starting point and account for any fertilisation already present. Let the prepared mix react before planting as appropriate for the materials and product instructions. One fixed waiting period cannot suit every recipe.

Watering and observation become your most important routine

Keep the root environment consistently moist enough without displacing air from the pores. The surface alone tells you little about moisture deeper down. Check several locations and consider container weight, plant development and previous water use. Our guide to watering Living Soil correctly explains the differences between pots and large beds.

Water quality and pH still matter after the switch. Living Soil does not automatically make unsuitable water harmless. Lime or CalMag therefore do not belong in every mix by guesswork. Our comparison of dolomite lime, calcite and gypsum helps distinguish different calcium sources.

Watch new growth and changes over several days. One unusual leaf is not a complete fertilisation plan. Check moisture, root conditions, climate and previous inputs first. When replenishing nutrients, account for existing reserves and the timing of release. Daily additions of raw materials do not make a slow reaction easier to control.

These shortcuts make the switch harder

• Changing everything at once: A manageable mix and clear records make changes easier to understand than many new amendments introduced together.
• Adding organic materials on top of the complete old feeding schedule: Both supply nutrients. Without a shared plan, their contributions can add up unintentionally.
• Trying to buy soil life alone: A microbial preparation cannot replace suitable structure, moisture, oxygen and organic material.
• Solving every problem with more compost: Compost also brings nutrients, salts and a particular structure. Its quality and quantity need to suit the medium.
• Expecting an immediate improvement in the harvest: The change does not guarantee higher yield or quality. What matters is how well you meet your plants' environmental and nutritional needs.

Your plan for the first cycle

Check your materials, select a suitable mix, prepare the start and then maintain it consistently. Record quantities and ingredients rather than repeatedly changing them during the cycle. After harvest, you can assess how water management, nutrition and structure worked together.

If you want to use the mix long term, the next step is targeted care and replenishment. We discuss what remains in place and when intervention makes sense in No-Till Living Soil. The Living Soil foundations take you through the individual components. For your first step, focus on a clear setup that you can observe and develop.

Sources and further technical reading

• Colorado State University: Plant Nutrition
• German Federal Information Centre for Agriculture: Why farmers fertilise
• University of Minnesota: Soil biology
• NC State Extension: Plants Grown in Containers
• LUFA NRW: Soil tests for home and allotment gardens

Technical sources checked in October 2026. General principles of nutrient supply and growing-medium care provide orientation here. Field-soil application rates and certification rules from other countries are not transferred to Living Soil containers.