Chitting Advice

The rule is in the light and frost free - everything else is just peoples best efforts at providing those conditions within their own situation.

Dark and warm (airing cupboard) is exactly what they don't need! They would make long, white, weak and spindly shoots 

Which channel was the program on and do th have an app like bbc Iplayer that can be used to watch it? Might be of benefit to us over the Irish sea

I have my seed potatoes in an egg box. Do you just let them be? Or should I be turning them periodically? All the shoots seem to be appearing on the bottom of each and i'm not sure if these are roots or shoots that are being produced.
Thanks

I thought I had all of mine the right way up, but no, there are always some awkward beggars that need turning 

Bought my seeds from Dobbies (can't remember the variety and have discarded the wrappers)  

They have been on a sill of a north facing top hall window for what will be 2 weeks this Saturday. I have spotted very small signs that something is happening (pin size green dots) on some of them. Had I not seen these growths developing, think I would have been posting the same question as you BLOOMING LOVELY.

I'm guessing it will depend on the variety and how cold/warm your bedroom is. Any advice I have read states it can take around 4-6 weeks for potatoes to chit. I reckon I'll be at least another 4/5 weeks before I can get mine in the ground.

I may have miss-understood you Rexmundi, so apologies if I have.  You do not need to wait for the chits to be of a certain size before planting out.  Plant then when the time is right weather-wise.