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Mushroom compost

I needed compost for containers to grow butternut squash and aubergines but everywhere I went was sold out. However I did find mushroom compost. Can anyone please advise if it is ok to grow butternut squash and aubergines in mushroom compost. They will be grown in the greenhouse.  I have also brought some manure which I thought I could mix it in with? Many thanks. 

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  • Pete.8Pete.8 Posts: 11,340
    Mushroom compost often contains chalk which makes it quite alkaline.
    I don't know if squash/courgettes prefer acid or alkaline soil.
    It sometimes also contains quite a bit of chicken manure which is fine if it's well rotted, but if there's a smell of ammonia, then it's too fresh and best avoided or left to rot for a few months before using.
    Aubergines grow into big plants and squash are even bigger so they need lots of space.
    I'd be a bit concerned about growing them in a greenhouse due to the humidity, high temps. and possibility of rot.
    They grow very well outside where I live.


    Billericay - Essex

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  • Pete.8 said:
    Mushroom compost often contains chalk which makes it quite alkaline.
    I don't know if squash/courgettes prefer acid or alkaline soil.
    It sometimes also contains quite a bit of chicken manure which is fine if it's well rotted, but if there's a smell of ammonia, then it's too fresh and best avoided or left to rot for a few months before using.
    Aubergines grow into big plants and squash are even bigger so they need lots of space.
    I'd be a bit concerned about growing them in a greenhouse due to the humidity, high temps. and possibility of rot.
    They grow very well outside where I live.

    Thank you for your help
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