There are also non-frilly types of kale. I prefer those because when aphids attack there aren't all the nooks and crannies to hide in as there are with the frilly kales. I grow one called Premier whose leaves are rather flat. It has taken temps down to the upper 20's without problem but probably wouldn't take as much cold as Siberian. Premier isn't a tall kale like the Tuscan but is more wide.
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