Woodash on soil or in compost


Does anyone have experience in using woodash in compost or on soil? I have access to a lot of deciduous woodash.



Hi Suella,

Iā€™m not sure of the composition of the wood ash I get from a friend. However, I put it in either my compost bin or hugel beds as I build them.

I used to put it directly on the soil but found that it caked rather than blending in. Mind you, in the compost it can still clump up or become quite slimey.

A friend occassionally gives me woodash which I give to alliums. He tells me it is good for everything and I should just put it everywhere. He does grow very impressive crops but I have a memory residue which I suspect dates back to the time of power station clinka so I would not do that myself. Most of my mentors are very much of the only apply compost to the soil way of thinking so they would recommend putting your wood ash on the compost. My John Bond Good food growing guide says " am excellent source of potash (up to 15%). Wood ash is alkaline and a useful soil neutraliser. It can be added to compost heaps to supply lime, potash, phosphorus and magnesium, or for spreading thinly over ground. Heavy dressings cake the surface and destroy the tilth. The younger the plant material burnt the higher the potassium content. Herbaceous plants and young bracken fronds can contain 50 per cent K. Spread over leaf mould, wood ashes speed up decomposition.

I am going to add my bonfire ash to the leaf mould next November but regretably have not tried that yet. The onions seem happy with th ash though.

I use it on strawberries & tomatoes as well as alliums. Based on old gardening books by Lawrence Hills.

I was wrong to use on blueberries though. They don't thrive in alkaline soils & mine are puny & yellowed. We live & learn...