Sorry if it’s an obvious question Galty, but you’re not growing them in the same patch every year are you?
And what about the type you grow, are there more ‘resistant’ types you could try like there are in blight-resistant tomatoes and fly-resistant carrots etc?
Failing that, all I can think of is try a smaller amount in a container or a couple of Grow-bags with fresh compost, so it would be a brand new growing medium altogether.
It must be very frustrating, and you must be wasting time and money as well.
Oh, one more thought, you may have already read this, but here is a link to the RHS and what they say about White Rot. It may be worth a read?
Best to grow onions in the same ground year after year Unless you have had white rot…use jays fluid and wait 3 years to plant onions again other things can be planted.
I Have just taken over an allotment, within walking distance of my house its been left fallow for a number of years and boasts a very impressive amount of weeds! still to wet to start digging but maybe soon
We have two honey bee hives on the site shame can not support any more
They Like Rosemary and Comfrey flowers which I grow, which will take another month to appear.
Now me being a bit of a slob left some sprouts in from last year which went to seed and started to produce flowers.
Took a break and sat down and watched the honey bees collecting pollen of the sprouts flowers and watched the honey bee having a punch up with a bumble bee both going for the same flower(another 200 hundred next to them)