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growing onions in a polytunnel

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QuestionsHow to growGreenhouse GrowingOther greenhouse vegetablesgrowing onions in a polytunnel
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mike kennedy asked 10 years ago

I am growing onions in a polytunnel but the stalks are shooting up way too fast and starting to fall over. Is there any way to slow this growth?

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Gerry Daly Staff answered 6 years ago
Onions respond to the extra heat by growing longer leaves and might flop over but onions usually continue to grow when leaves have toppled.

You can slow growth a little by not watering as much, but left too dry, the onions may go to seed and not form a bulb at all.

Onions do not need the heat of a greenhouse, only to start off seeds, if you wish, and the seedlings are planted out.

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