With our mild frost free Winters and warm wet Summers, onions generally don’t do well in the subtropics. They are cool-weather growers, and need a bit of chill to form bulbs. I have tried about six different varieties from seed, plus leeks and chives, and have had good results only from white bunching onions, meaning that these might be the subtropical onions for me.
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Onions are another crop that can be tricky in the subtropics, but generally they need some patience and understanding. Most types need cold weather to form good bulbs, so for warmer climates bunching onions with their different growth habit can be a good choice. They are like permanent spring onions and they grow like massive chives, with many stems. Growing bunching onions Autumn is a good time to sow, to take advantage of the cooler weather. After moving here I planted mine in late Winter, which was not an ideal start, but…
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