The frosts have arrived and the three survivors in pots are looking very disheveled. If I plan to regrow them again next year in the same pots can I leave them potted and move the pots into an unheated greenhouse for the winter? Will they overwinter like this or do they need lifting and storing, any suggestions? many thanks for any advice anyone could offer.
You can overwinter them in the greenhouse in their pots but they'll probably do better next year if you replant them in fresh compost in the spring, and they might benefit from bigger pots as the tubers should have got bigger.
Doncaster, South Yorkshire. Soil type: sandy, well-drained
thanks @jennyj I will move them this weekend before we get too many more frosty nights. What would you do with all the foliage now, cut everything down to an inch or so?
I leave mine in the ground here (sandy well-drained soil), but I cut off the stems back to just a bit above the ground (just enough that I can see where they are so I don't dig them up by accident before they start growing).
Doncaster, South Yorkshire. Soil type: sandy, well-drained
Thanks again @JennyJ I will cut back and move this weekend.
i have a few other potted perennials that I believe are borderline hardy. Agastaches ( I lost one over winter last year in the ground) and an evergreen agapanthus. I potted these this year to help overwinter them. I also wanted to overwinter these in an unheated greenhouse, should these be moved in now too? we have now had a couple of slight frosts overnight.
I've only got deciduous Agapanthus, which stay outside in their pots moved near the house walls, and my Agastache have come through winters fine in the ground so far (again the sandy soil helps) so I'm afraid I can't help you. Hopefully someone else will be along soon - I think @Hostafan1 grows Agapanthus so maybe he'll know.
Doncaster, South Yorkshire. Soil type: sandy, well-drained
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You can overwinter them in the greenhouse in their pots but they'll probably do better next year if you replant them in fresh compost in the spring, and they might benefit from bigger pots as the tubers should have got bigger.
i have a few other potted perennials that I believe are borderline hardy. Agastaches ( I lost one over winter last year in the ground) and an evergreen agapanthus. I potted these this year to help overwinter them. I also wanted to overwinter these in an unheated greenhouse, should these be moved in now too? we have now had a couple of slight frosts overnight.