Also try adding pulverised charcoal alone (without any fertilisers), to the soil around similar plants to help in arriving at more balanced results. The aim is to compare plant health, growth rate, yields and flavour.

Is burnt charcoal good compost?

Fireplace ashes for compost can be used to help maintain the neutral condition of the compost. It can also add nutrients to the soil. … Compost with charcoal can have chemical residue from the additives in the charcoal. These chemicals can be harmful to plants, especially when used in large amounts.

Is burnt wood charcoal good for plants?

Unlike the decomposed remains of leaves, stems and other green plant parts, burned wood doesn’t contain nitrogen. But it does provide phosphorous, potassium, calcium, boron and other elements that growing plants need. … Use only wood ashes, not ash from coal, charcoal briquettes or fake logs.