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Overwintering tender perennials

iankyle2Hd9Gmtfziankyle2Hd9Gmtfz Posts: 19
in Plants
Any advice for overwintering tender perennials in containers....agapanthus windsor grey and charlotte and salvia nachtvlinder and love and wishes? I do not have a greenhouse but I have a small growhouse.

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  • AnniDAnniD Posts: 12,585
    @Fairygirl might be able to advise, she's pretty far North. I would say Nachtvlinder is slightly tougher than Love and Wishes. I have never been able to overwinter that and l'm in South West England. 
  • FireFire Posts: 19,096
    You might want to try fleecing the pots and plants.
  • FairygirlFairygirl Posts: 55,117
    Hi @iankyle2Hd9Gmtfz - if it's one of those plastic ones, no - they won't be enough, unless you're in a sheltered position in the town itself. Even then, the dampness can be a problem so you'd need to watch them regularly. I still wouldn't trust them.
    Salvias are very iffy here altogether. I grow one, but it's that hardier one - S. nemorosa 'caradonna'. I have it in a pot, and I tuck it in behind other plants against the house wall to keep it drier over winter.
    Agapanthus - some are hardier than others. I wouldn't leave them in a plastic greenhouse though. 

    Cannas don't survive in cold frames or similar here, so that might be a useful guide. I've always had to bring them inside the house, or a conservatory, for them to get through a winter.
    It's a place where beautiful isn't enough of a word....



    I live in west central Scotland - not where that photo is...
  • iankyle2Hd9Gmtfziankyle2Hd9Gmtfz Posts: 19
    They were planted this year in glazed pots. The salvias are still in bloom. I live in inland Fife and we had a light frost last night. I will now need to take steps to try to protect them. I think I will try to cover them with fleece in my plastic growhouse. Fingers crossed.  Will they need any attention over the winter such as watering?
  • FairygirlFairygirl Posts: 55,117
    edited October 2020
    Ah - ok. Fife is very different from here. I don't really think of it as Central Scotland  :)
    Keep them on the drier side anyway. Wet cold isn't good for any of those.
    They would manage dry cold better, but again - once you have regular frosts, that cold gets compounded, so you'd definitely need fleece, or more .   :)

    It's worth doing cuttings of your salvias next summer too, to give you back up if you lose the main plants  :)
    It's a place where beautiful isn't enough of a word....



    I live in west central Scotland - not where that photo is...
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