"Doug Kanter" expounded:

Marginally hardy south of Boston??? The plant does fine here (Rochester NY),
where the winter makes yours look like a trip to a day spa. What sort of
miniclimates do you have around your house?

The constant warming/frost, etc. causes them to start growing too
early, then they get caught by a hard freeze and it kills them. You
stay more consistently cool until you warm. Big difference.
--
Ann, gardening in Zone 6a
South of Boston, Massachusetts
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