Overwintering plants in a greenhouse

Discussion in 'General Gardening Discussion' started by Nikolaos, Nov 12, 2019.

  1. Nikolaos

    Nikolaos Gardener

    Joined:
    Jun 26, 2019
    Messages:
    438
    Gender:
    Male
    Location:
    Midlands, UK
    Ratings:
    +702
    Hi All,

    I bought three plants that are slightly too tender for my hardiness zone (USDA 8, RHS H4-H5) due to not doing enough research before buying and my friend has offered to keep them in his greenhouse. Will they need covering with fleece or should they be fine without it? And will any of them need watering?

    They are Salvia 'African Sky', Salvia uliginosa and Convolvulus sabatius.

    Thanks,

    Nick
     
    • Like Like x 1
    • NigelJ

      NigelJ Total Gardener

      Joined:
      Jan 31, 2012
      Messages:
      2,026
      Gender:
      Male
      Occupation:
      Mad Scientist
      Location:
      Paignton Devon
      Ratings:
      +6,413
      @Nikolaos Unless it turns particularly cold they shouldn't need covering with fleece in a cold greenhouse. I probably wouldn't water until spring, unless they start to wilt when I would give a little water.
       
      • Agree Agree x 1
      • Informative Informative x 1
      • Nikolaos

        Nikolaos Gardener

        Joined:
        Jun 26, 2019
        Messages:
        438
        Gender:
        Male
        Location:
        Midlands, UK
        Ratings:
        +702
        Brilliant, thanks for that, Nigel! I suspected they wouldn't need fleece but it never hurts to check. :blue thumb:

        Nick
         
        • Agree Agree x 1
        • Perki

          Perki Super Gardener

          Joined:
          Jun 2, 2017
          Messages:
          836
          Gender:
          Male
          Location:
          Lancashire
          Ratings:
          +2,701
          I chuck tender salvias ( amistad etc ) in a pot and leave them in the GH and dont water them till late winter spring or till they start growing. You would probably get away with most plants in H4-H5 outside. I have Uliginosa in the garden and it survived the winter ( it were quite mild last winter ) just got swamped out by its neighbours so lifted the other day.
           
          • Like Like x 1
          • Informative Informative x 1
          • ARMANDII

            ARMANDII Low Flying Administrator Staff Member

            Joined:
            Jan 12, 2019
            Messages:
            43,370
            Gender:
            Male
            Ratings:
            +88,079
            :hate-shocked::heehee::loll::lunapic 130165696578242 5:
             
            • Funny Funny x 2
            • Mike Allen

              Mike Allen Total Gardener

              Joined:
              Jan 4, 2014
              Messages:
              1,519
              Gender:
              Male
              Ratings:
              +2,690
              This is perhaps what makes gardening so interesting. Irrespective of ones knowledge of horticulture, what books we have read etc. We all at some point ask our friends.
              So so often we find ourselves perhaps underestimating the plants ability to withstand the traumas of life. I wonder. Please cast a thought back in time. The compost heap or dumpsite. Hey! That plant I dumped has started sprouting! I recall the winter of 62/3 on the plot some discarded plants had laid bare to that vicious winter, and now were showing signs of life. So overwintering plants in the GH or under other protection. Allow them to drift off into their dormant state. Gradually withold watering. Even in a GH extra precautions can be taken, such as, covering the pots etc with straw or fleece. Much of this remains a matter of trial an error.

              For instance. This year. I have had a good display of Begonia semperflorens outside my front door. We have already had a couple of overnight frosts, yet the plants are still good. Most gardeners would simply pull up the plants and destroy. Me. I will lift them. Take cuttings..............cuttings this time of the year. Yes! done it before and had good results. Cuttings and rootstocks will be kept in the GH. Apart frp the bubble plastic GH insulation. This is now home for both cuttings and roots until spring.
               
              • Informative Informative x 2
              Loading...

              Share This Page

              1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
                By continuing to use this site, you are consenting to our use of cookies.
                Dismiss Notice