Sorry, posted to the wrong forum..

Are they dead? Or can I cut them back- how far down the stems?
It took ages for them to grow. Help

Wrong therad (as you said), but........

First photo, just cut off the dead. It looks like the center growth point is fine.
Second photo, the leaves are dead all the way to the center. cut into one of the stems at the top, is it mushy or green? Green/red/not-mushy -> Ok, should grow back. Mushy/brown/yellowish-clear -> Cold damaged, you can cut back until you see healthy tissue.

My Ti plants do that every winter. As long as the roots don't freeze, you'll get new growth.

Next time a freeze heads your way, you can cut them off @ soil level, stick in a bucket of water, roots will appear within a week, then plant back in the garden. Water well to get it established. Eventually you'll have a LOT more from doing that, and never have to start a season with ground-level-only plants. Or if you turn a big trash can over them for the frozen night, you might not have any leaf loss.