Old compost help!

[OuiOuiMonAmi]

I've got 4 or 5 large veg boxes (around 3 feet square). The plants in them have mostly been diseased - I'm not sure whether soil or air-borne. I've Googled but it doesn't seem to fit any description. Anyway, I presume I can't reuse the compost because of the disease? I don't suppose there's such a thing as compost steriliser, is there?!

Also, what on earth do I do with it?! Google has lot of ideas for reusing small amounts but there's so much of the stuff... far too much to dump on a flower bed.

Any ideas?!

Council tip. You may have to pay.

Garden waste bin

Bag it up and use it as soil improver over time.or Facebook or free cycle it.

@mayblossominapril

Garden waste bin

Check first. Our council garden waste bin explicitly states no soil

What plants were you growing? It may help identify the disease.

@TroubleInSnowland

What plants were you growing? It may help identify the disease.

I was growing courgettes and squashes. They definitely have powdery mildew but they're also going rotten at the ends (like blossom end rot on tomatoes but it's not that).

The powdery mildew is perfectly normal on courgettes etc… I compost mine and the soil is fine. The leaves go like that due to water on them. I’d compost.