The tub contains amaranth, borlotti beans and silverbeet, some of which are so tiny you can't see them. The beans sprouted in this tub, the other plants were added as seedlings, so the beans are the only thing that grew at all.
I have aerated, fertilised, watered more and watered less.
If anyone has any ideas about the cause or possible solutions, I want to know!
Lots of love and thanks in advance,