Weeds In Bought Compost

Question

I use bags of expensive compost every year and have noticed my garden is now covered in one type of weed which I don’t recognise but it is everywhere. I had a bag left over from last year and where the bag was torn these weeds were growing from the holes. My question is can bought compost contain weed seeds?

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Answer 1

It can, but typically a properly turned and heated compost won't contain any seeds. You can use boiling water to kill them off without harming the soil, though.

https://www.gardeningknowhow.com/composting/basics/heating-up-compost-pile.htm

https://www.gardeningknowhow.com/composting/basics/storing-compost.htm