Inactive compost can be a barrel of trouble for growers. Factors such as the amount of compost/m², the extent of compacting when filling phase 2 and phase 3 compost and the quantity of supplement all influence activity.
It’s important to start at the root of the problem of the compost. A composter always depends on the raw materials supplied, but despite this reliance there are still many ways to influence compost activity. Take a critical look at the fermentation process to see if it can be shortened by a day. The compost must already be well decomposed in order not to cause other problems such as ‘too green’ compost where the decomposition process is not completed. Secondly it’s important to achieve the right balance of ingredients in the compost to stimulate good decomposition.
An oxygen rich micro-climate is also very important. And optimal moisture content is a must. Finally keep levels of micro-flora active by mixing fresh compost with maximum 5 % inoculable compost or fresh compost of a couple of days old after the high phase 1 temperatures which destroy micro-flora.
Jos Buth, C point