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I note that Chris says keep them uncovered and dry. yet Monty says keep them covered and moist. I will, as ever, ignore Monty's advice.
Alina W

Don't - dahlias can dry up and die if they get too dry.

I pot up dahlias and keep dry. I dig up tubers and leave them uncovered in the greenhouse. I leave dahlias in the ground. Albeit I'm in mild SW I have only lost dahlias through rot. Did Monty say keep them moist? How can you do that with tubers? If tubers are now fat n full I think keeping them dry and frost free is best. Keep in greenhouse, wrap in fleece and in cardboard boxes.

To clarify-he stored them in a box with vermiculite and he damped the vermiculite-he did not say keep them moist -just not to completely dry out-I find they seldom completely dry out and I cover mine with newspaper

His were kept in frost-free greenhouse where the temperarure did not drop below 5c as I recall so pehaps a tad warmer than usual and he also said to inspect them occasionally-good advice

If you think about if kept in the ground they are never going to dry out and always be moist

It is as usual what works for you-ignore what you l like-but why "as ever" Hostafan 1?


Alina W

By contrast, I've never had any problem with rot in an airy garage, but I have lost them through drying out. As Geoff says, they never dry out in the ground.



I thought you waited untill the frost has killed of the folige and then dig them up turn them upside down for a week or two and then store them in a cool dark place in a brown bag or straw.


turning upside down to let the water drain out so they don't root 


My dahlia is still flowering and new buds are still coming through. Should I cut them all down. And put thick mulch to cover in winter as I am not planning to take them out from the ground. 

I welcome all your advise as this is my first year in gardening.

kind regards

I'm planning to do as green gardener has suggested, the first frost turns them dormant. I would def dig them up, here in the midlands mine wouldn't make it through the winter.

Sorry, I meant clueless gardener. I've bought sawdust to store mine in.

Hi there. I planted out 4 Grandalia Sunrise dahlia plants 23rd June in Scotland.(56.1964º). They bloomed well throughout the summer. It is now 17th October and we have had our first frost. Not a very hard frost and none of the leaves or stems have blackened.

I lifter one plant and washed the root system. No tubers - the plant maybe too young or grown for flowers only. If there are no tubers to die while in ground over the winter - which may or may not be heavy (climate change!!) - will I lose the remaining three plants.

Will I cut them down to the ground when they have blackened, cover the roots with winter fleece and a heap of mulch? Will leave the one I lifted to dry off and then store in the shed up off the ground in a tray with bulb fibre to cover the roots? Should I sprinkle with sulphur in case of rot?

I come from the tropics and here ... I have no experience with these plants.

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