Given that the recent hot dry weather has resulted in my garlic plants having very little green foliage, it's mostly yellow, should I lift them now, or wait until autumn when I'd normally expect them to go yellow ready for harvesting ?
Late last autumn IIRC. It's not the planting so much, it's whether the heat will have not only yellowed the foliage but stopped bulb growth too. I'd prefer to give them time to maximise bulb size but the state of the foliage makes me query if leaving them a month or two more is wise.
If I can't find the answer on the net I may have to just harvest them anyway.