Little Chits?

I bought my first earlies - Rocket - from Wilkinson's on 13th Feb and immediately laid them out to chit in my south facing conservatory. They started after about a week but growth was very slow. Somebody suggested it might be too light & so after another week or so I moved them into the garage.

The chits are currently about 1cm long and purple, and just don't seem to be growing. Am I doing something wrong? Should I wait until they're longer or would they now be just as well off in the ground? 

Too much light wouldn`t be a factor.
I had Rocket from Wilkinsons too and they chitted O.K. I know some people say keep them cool to avoid dehydration, but I like to chit them in a warm bright room, above 15 C. Mine never went soft at all.

If you plant each one in a small pot of moist compost with the eyes level with the top of the compost and keep them in a warm light place they will rapidly start chitting and rooting. 3 or 4 weeks later plant out as normal.

We have noticed that the early potatoes don't seem to have such 'vigorous' & long shoots/chits as the maincrop potatoes, it doesn't seem to effect their growing & cropping.

That's a lot of faffing around...........why don't you just plant them the same as he will ?

The ground has warmed up a lot down here so I would put them straight in the ground now. Yesterday I dug up some taters left by a previous tenant and they were already growing (no chitting needed there  )

Thanks for all your replies - they've gone back in the conservatory, then, and I'll get them in the ground as soon as the warm stuff looks like it's here to stay