Red Onion

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Ian Foster
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Hi,

Most of my Red Onion sets have bolted despite being "heat treated". Is there a way to stop bolting in future ?

Thanks

Ian
tigerburnie
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I grow Robinsons Mammoth Red Onions from seed, so far no problems over the past 5 years
Been gardening for over 65 years and still learning.
Myrkk
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I think it’s a tough year to stop this tbh. the weather has been so unpredictable. It was 5 degrees last week and then 18 yesterday, I’m not sure you can account for that level of stress to plants. Popping one of those white fleecy things over them that allows the sun and water in but protects from the cold snaps might help?
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oldherbaceous
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Well heat treated sets shouldn’t bolt…..were they Autumn plant ones, Ian?
I have gone back to growing Onions from seed and this has stopped the bolting problem….for the Spring sowing/planting Onions, that is!
Kind Regards, Old Herbaceous.

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tigerburnie
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I grow a few shallots from sets, but I doubt I will ever go back to Onion sets again, starts the growing season off sowing your Onions in December in the propagator for me.
Been gardening for over 65 years and still learning.
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