Are they dead?

A cuphea and some calibrachoa, over wintered in a cold greenhouse, and most importantly a Scabiosa Knautia Boujalais Bonnets are not showing any new growth yet - should they be? I cut them all back a bit when they'd finished last year and they look exactly the same now, stumps of woody stems and nothing else. Thank you. (I'm new to the forum, so hi)
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Yes, clk; welcome
Wonderful, thank you. Good thing I joined the forum or I would composted them tomorrow.