Plants derive their nutrients from flower soil, but you don’t have to discard old flower soil after just one use. With these tips, you can make it fertile again.
For those aiming to beautify their balcony or garden, a substantial amount of flower soil is necessary. To avoid continuously purchasing new substrates, hobby gardeners often wonder: can old flower soil be reused?
Indeed, flower soil can be reused multiple times if you know how to restore its fertility. By recycling flower soil, you save both resources and money.
Important: When purchasing flower soil, ensure it is peat-free. Peat extraction harms the climate and biodiversity of peatland areas.
Preparing the Flowerbed to Restore Fertility
Before reusing old flower soil for planting, it needs to be enriched with new nutrients. The first step is to clean the flower soil.
To do this, loosen the flower soil from the pot or planting container with your hands. Then remove all root remains, stones, or pottery shards. Ensure the soil is healthy; if you find pest larvae or mold, it’s best not to reuse it and instead discard it.
Tip: Plants like lettuce or herbs have a low nutrient requirement, so you can use the cleaned flower soil to plant them without additional enrichment.
Making Old Soil Fertile Again by Adding New Nutrients
The quickest way to restore the fertility of old flower soil is to mix it with new substrate. Combine one part of the cleaned old soil with one part of the new substrate.
Another simple method is to mix old flower soil with compost. Mix one part of the cleaned old soil with three parts of compost.
Making Flower Soil Fertile Again with Charcoal
Another effective method is to use charcoal to rejuvenate old flower soil. Charcoal, made from renewable materials like wood, hedge clippings, or leaves, has a fine carbon structure that can effectively store nutrients and water.
You can purchase charcoal at well-stocked DIY stores or garden centers, or make it yourself by burning wood and other dry garden waste in a fireproof container or pit, extinguishing it with water, and then grinding it.
Before incorporating homemade charcoal into the old flower soil, activate it with microorganisms. This step is not necessary for store-bought activated charcoal. Sauerkraut juice is ideal for activation—add a liter of sauerkraut juice to the charcoal. Then mix 100 parts of old flower soil with four parts of the activated charcoal.
