London (change)
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24/11/2011 at 15:28
I got 6 dahlias in pots is it ok to leave in pot & store in shed & also should i leave or cut off stems. Chris
24/11/2011 at 15:28
The danger with leaving them in the pot is that they will rot. What I would do is remove the dahlia from the pot, cut off the stem and dry the tuber as described in the article. Once dry place the Tubers in a tray/pot and cover with dry compost. Then watch Sarah's video on taking cuttings. From my experience taking cuttings is a guaranteed way of increasing your stock of Dahlias for free!
24/11/2011 at 15:28
I would like someone to answer stoneyford(Chris') comment because I'd also like to ask that question! Thanks Vic.
24/11/2011 at 15:28
Last year as a trial I left one Dahlia plant in a pot & it came back this year and it is flowering now. When the leaves were blacken by the frost I cut the top growth and left the tuber in the pot & kept it dry in the greenhouse. Around March I brought them inside onto a sunny windowsill and started watering the tubers and they started to grow. If you keep the pot dry you should be able to leave the tubers in their pots.
24/11/2011 at 15:28
is it OK to lift them if they are still in flower ? or should i wait until they die down.
24/11/2011 at 15:28
I live in Enniskillen N.I. we can't leave in soil as they will rot. To wet.
24/11/2011 at 15:29
Interesting post! I've been searching for useful tips on how to grow dahlia tubers. I want to grow dahlia tubers of different variety I got at Lynch Creek Farm. I look forward to see other helpful tips in this site.
24/11/2011 at 15:29
I leave my dahlias in the ground until the frosts, because where I live ( Sutton Surrey ) they are still in their prime. Gardening as we all know is not done to the exact time of the year but by on conditions prevailing at the time. I think this is important to bear in mind the pundits are reminding us not saying it should happen necessarily now.
24/11/2011 at 15:29
Excellent advice. I was really unsure what to do with my Dahlias but this answers my question. Thanks GW....
24/11/2011 at 15:29
I was thinking of using sawdust instead of dry compost, for storage, any comments would be welcome
24/11/2011 at 15:29
I usually wait until the first frost when the foliage goes black, then i lift them.
29/09/2012 at 07:32


I left mine to their own devices last year and didnt even dead head at the end. This year I have had loads of new plants even different colours.

29/09/2012 at 09:24
I turn dahlia tubers upside down to "drain" for day or so before potting up or storing. I do this on greenhouse shelving but anywhere warm n dry. Dahlias can be left in the ground here but those I do lift, to propogate, etc.,, are treated as I've described
30/09/2012 at 18:56

I grow all my dahlias in large pots.  I lift them before they are frosted - usually when they start to look straggly (October time).  I dry them off upside down in the greenhouse for a couple of days.  I then wrap them in newspaper and store them in cardboard boxes in my loft.  I have not had any failures.  This year (and the tubers are a few years old now) they reached 6 ft. and gave a truly wonderful display.

13/10/2012 at 12:45
It is mid October and my Dahlias are still in flower. I read that I should cut them back and lift them for the winter - is it too soon? I am reluctant to cut back such beautiful flowers before I need to...
13/10/2012 at 12:51

DO NOT cut them back, enjoy the flowers, they will be fine until the first frost. It is a recommended task but obviously depends where you are in the country, if you have a sheltered garden you could get another 6 weeks of pleasure whereas someone in Scotland may already have had to dig theirs up.

13/10/2012 at 13:17
I don't think there is anything complicated about storing dahlia tubers. As long as they are DRY. Dont let them shrivel so wrap in something. I use fleece but others use newspaper and other materials and keep in greenhouse or indoors. I totally agree with kate1123, enjoy your flowers for as long as possible
13/10/2012 at 15:46

You should not lift dahlias until the frost has blackened the tops-they longer they are in the ground the better- this builds up the food reserves in the tuber making it bigger for flowering power next year

Some don't even lift them but leave them with a thick mulch too see them through the winter.

14/10/2012 at 16:12

I have had some disasters with dahlias over the years. When we lived in Reading, Berks, I dug up the tubers and stored them in the loft. It was too dry and I lost the lot. We moved to central Scotland. I lifted the dahlias and stored them in the shed. Temperatures fell to -17 degrees that winter, again I lost the lot. Next year, stored them in the shed carefully insulated I thought, again very low temperatures caused me to lose them all. Last year I lifted them, dried them, packed each tuber in a plastic bag with holes in and put them in crates under the stairs. Al most all survived! I started them in pots in the greenhouse (remember that fine weather in March?) We went away for a week. There was snow. I got back to find the tops blackened but luckily got away with it and have had a fine display. I've just lifted them and am drying off. Will store under the stairs again as it is neither too hot nor too cold there. Fingers crossed.

14/10/2012 at 20:09
Helen, you deserve to succeed with your dahlias. Such determination despite the setbacks. Bet you get great plants next summer
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