Recycling natural materials
In open ground, humus in theis made by the natural breakdown of plant materials. It provides enrichment which is valuable to the growth of plants. You can provide humus for container-grown plants using fallen leaves which can be gathered in woods and parks. Let the leaves dry out completely and crumble them to produce a fine texture which can be blended into the soil.
It you store leaves tor making humus, do not keep them in plastic bags as they will retain moisture and develop mould. Dry the leaves and store them in paper hags or boxes.
You can buy garden lime in small and large quantities, but if you prefer to use a natural material which would otherwise be discarded, eggshells can be used to increase the lime content of your growing medium. Crush them very finely, as sharp fragments can cause damage to the most delicate roots in a plant’s root system.