Alstroemeria overwintering

I have a large Alstroemeria in a pot, I understand they are not fully hardy in cold climates.  If I move the pot to an unheated greenhouse or shed overwinter will this be enough to keep it ?  Also if the plant survives, when is the best time to split it ?


  • Alina WAlina W Posts: 1,445

    Yes, it should be OK provided we don't have very severe frosts. Keep it only lightly watered, too.

    Splitting - I would be inclined to do this in spring.

  • sotongeoffsotongeoff Posts: 9,802

    I have had alstroemerias growing in the borders for the past few years-and have survived bad winters-before that they were in a container and were quite happy in an unheated greenhouse over winter-my feeling is despite their exotic look they are a lot hardier than we think

    As Alina says split in the spring

  • Thank you both for the good advice - off to the greenhouse/shed with it then, soon, and fingers crossed

  • I have a number of alstromerias and have left some in the ground for the last 4 winters, its been down to -10 for the last few winters here, i just put a heavy mulch of manure over them to protect them, the ones i have in pots i just move under a large tree and allow them to die back and pile the old growth on top of the pot to give it some protection. ( the soil here is very free draining, if you have a heavy damp soil they may not survive so well)

  • Thank you Bournemouthgardener, another few handy tips for Alstroemeria survival

  • Alstreroemeria in pot must in greenhouse in wintertime.  

    I have 60 variable colours. (cut-alstroemerias-tall 70 cm)

    From most of them I have grains.

  • Thank you Paul, so far the weather is mild for the time of year, but will put in the greenhouse soon

  • Thanks sunnylou. Put the pot in the ground and cover the pot with a little mulch around the plant. The advice of Bournemouthgardener is good.

    Give also the plant a little water from time to time. 

    The soil in the pot has to be very free draining.

    Split the plant in spring.(15 mai)

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