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10 messages
22/06/2013 at 08:39

What causes onions to bolt? Can this be stopped? Is the ground too hot? cold? wet? dry?

Any ideas appreciated


22/06/2013 at 09:30

Probably too dry, but will eventually go to seed anyway. When they do that there probably isn't much more growth to come so you can start to lift and enjoy. Usually you lift the plant a bit to break the roots, lay it down to enable the foliage to die off (which also feeds the bulb) , and then store or eat. Plants that go to seed store less well, than those that don't. So if you do store check them regularly looking for mould or nasty things. Then salvage what you can.

22/06/2013 at 10:41

Thanks Woodgreen. I think you are assuming that the onions are mature, but they are still very small. I am surprised that this one has bolted so early.I have kept them quite well watered in my raised bed so I doubt they were too dry. Should I lift them as soon as they bolt even if very young?

23/06/2013 at 15:42

Onions have to be the most neurotic veg on the planet. The only need the slightest disturbance to think they're in peril and will seek to reproduce themselves by producing a flower, which is what bolting is all about. Fluctuating temps can be enough to do it. I now wait till temps have stablised before planting them.

23/06/2013 at 15:59

Thanks Italophile. So I could wait a long time in the NE of Scotland for temperatures to stabilise!!

23/06/2013 at 16:11

I've tried everything and they still bolt!! I just live in hopes and eat BIG spring onions!!!

23/06/2013 at 16:26

John, fluctuating temps can be one cause. Or too cold or too hot. Or irregular watering. Anything that gives them a fright. They're just neurotic creatures.

23/06/2013 at 16:43

I have only just managed to finish my raised bed and have been growing my onions in my conservatory.

How deep should I plant them ?   

23/06/2013 at 16:56

I plant them deep enough just to bury the white part.

23/06/2013 at 17:04

Thank you. I am going to do it now while the rain holds off !

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