I should say that depends upon the species/cultivar, filmbuffy.
If they are a deciduous type, then hopefully they'll be ok.
If they are evergreen, then probably not.
Evergreen Agapanthus hail from the warm, wet East and West Capes of South Africa and so are generally more tender.
I have an evergreen Agapanthus in a large container. Every winter it goes into a cold greenhouse, insulated with plenty of fleece and no problems so far (have had it for over 10 years now).
A nice deep 8-9" mulch of dry straw around the deciduous types applied in early winter and removed in spring is usually enough to keep them protected.
Just give the leaves and stems a tug. If they're ready to come away you won't have to pull hard.
But I wouldn't plant into open ground now. It'll be cold and wet. I'd wait until you see signs of growth in the spring, then you'll be sure you're planting living bulbs - just in case some tender ones have died over the winter.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
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I should say that depends upon the species/cultivar, filmbuffy.
If they are a deciduous type, then hopefully they'll be ok.
If they are evergreen, then probably not.
Evergreen Agapanthus hail from the warm, wet East and West Capes of South Africa and so are generally more tender.
I have an evergreen Agapanthus in a large container. Every winter it goes into a cold greenhouse, insulated with plenty of fleece and no problems so far (have had it for over 10 years now).
A nice deep 8-9" mulch of dry straw around the deciduous types applied in early winter and removed in spring is usually enough to keep them protected.
I grow the deciduous ones; this is what they look like at the moment - they'll be fine
The more tender ones tend to be the ones with thicker fleshy leaves. Do you know which you have?
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Have both types i think. Wanting to plant in border now. Can i cut them back and remove flower stems?

Just give the leaves and stems a tug. If they're ready to come away you won't have to pull hard.
But I wouldn't plant into open ground now. It'll be cold and wet. I'd wait until you see signs of growth in the spring, then you'll be sure you're planting living bulbs - just in case some tender ones have died over the winter.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.