Two things. Whiteflies can complete a generation in 3 weeks. If you can protect your crops for 3 weeks, that can help break the infestation. Second, as you go into cooler weather, predators work faster and keep them under control. Once you get to some really cold weather, the predators will get ahead and you shouldn't have a problem.
Do it! Just cover it immediately.
I would. Either treat the new kale with neem regularly and keep the other plants as a decoy or cover as already stated.
I'm 7b so were roughly the same. This gives me hope!
Two things. Whiteflies can complete a generation in 3 weeks. If you can protect your crops for 3 weeks, that can help break the infestation. Second, as you go into cooler weather, predators work faster and keep them under control. Once you get to some really cold weather, the predators will get ahead and you shouldn't have a problem.
Yes, it’s great! Leave it to overwinter and vigorous growth in the spring is delicious!