Seedlings safe to move to unheated greenhouse?

Grandma Sue, They look fine to me.

 

I wouldn't be too keen to over pot at this stage, just because a few roots show in the drainage holes doesn't mean the plants are pot bound.

 

Thanks Pete, always glad to hear your advice. I will now deff wait until their begging me to go into a larger pot.

 

Yeah well dont leave them too long but those pots look big enough to me until planting out time.
Too much potting on early could delay the first flower truss and cause lots of leafy growth.

 

Yes - don't let them get too comfy. It's counter productive
Treat 'em mean and that pushes them into self preservation, ie flowering/fruiting.

 

Don't think anyone treats their tomatoes as mean as me. These little babies have been out in the cold with only a storage box for protection since 'conception' in February (drainage holes in the bottom and holes in the lid for ventilation). They're not roaring away I'll grant you, and some varieties are doing better than others, ie. Burlesque are taking their time. They're all hardy, with no signs of damping off, and where they're not as forward as their more 'pampered' cousins, I've a feeling their growing season might be a little longer than the softer grown ones. Nature is the driving force and not a germination set up. This system of growing may not suit everyone, but I'm happy with it, it's less stressful and pretty easy to do. I wouldn't swap methods in the middle though, just wanted to illustrate how you raise your seedlings matter.

 

It is still early to put tomatoes in unheated accommodation. However, your tall seedlings need more light so perhaps putting them in the cold frame lined with fleece for night time might be OK. It looks as if you have plenty of replacements if they get caught by a late frost.

 

Looking at others pics maybe I should have started earlier.

 

Mine are just growing their first true leaves (except a couple of stragglers). I'll probably transfer them into individual pots next weekend, then they have about a month to six weeks before it's safe to put them outside in the open permanently. They'll be doing the hokey cokey (in-out-in-out) before then depending on the weather, probably finishing with a week or two in the cold frame.