[Geordie]

I am over wintering some dahlia Tubers in my garage for the first time and they have started showing what looks like mold?

Is this anything to worry about? The tubers still feel solid but unsure whether I should be doing anything about it.

Any help would be greatly appreciated. 

[mumofstig]

If it's just on the stem, I'd just brush it off, and keep an eye on them. Any tubers that start to go mushy should be removed from the root. You sometimes get 1 or 2 but if they're removed before they all get rot, the plant will still regrow.
Do you have anywhere dryer you could move them to? More mould would then be unlikely..

[Geordie]

My garage is quite cool, averaged about 5 Celsius over the last 3 weeks. It has dropped to 0 Celsius recently but I have them fleeced and in a cardboard box.

I will clean them up as you suggested and see if I can find somewhere slightly warmer.

Thank you.

[Geordie]

Thanks for the info.

Having cleaned them down and brushing away the mold I think the problem may be I didn't dry out a couple of the tubers fully!

Do you think it would be ok to pop my 'not completely dry' tubers into a propagator for a few hours set at a low temperature, maybe 12-15 Celsius?

 

[mumofstig]

Doing that would probably make them start growing, so unless you have somewhere to grow them on eg conservatory/frostfree greenhouse, I wouldn't advise it.