Is there a general rule about when to re-pot potted citrus? May be width of the foliage/pot diameter ratio or something like this? I have potted Owari Satsuma that is growing in air pruning pot like this: 
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so root bounding is not an issue, but it would be interesting to know when it is not enough root volume for the tree to grow well.
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Re-opening this topic
I have a couple of citrus that have been in their pots for quite a while and I want to re-pot them. But when? The lime tree is fruiting, new fruits at various stages but none ready to pick. I figure re-potting now will disturb the roots and cause the fruit to abort.
I’d rather do it before I take them inside for the winter, but a freeze is due next weekend so I have to take them in this week - this always disturbs them and causes leaf drop. In the spring, they bloom.
They never seem to go dormant, when re-potting would safest. So - when?
I agree with you on this. Bringing them in for the winter is enough stress on them, so I wouldn’t re-pot now. Before growth resumes in early spring would be the ideal time.
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It can be a narrow window