Unless the plant is becoming root-bound in its container, unlikely for a 3-inch plant, I would wait until springtime.

Berry plants are typically planted in isolation, a foot or more from any other plant, and much can happen in the dead of winter to such a small object. Perhaps you will be caging or protecting the seedling outdoors.

Otherwise the raspberry should be plenty hardy in your zone.

Ok that's what I was thinking. It is probably a bit risky and even unnecersery to throw it out into the cold. It is my only raspberry seedling my other one died so at this stage it's probably best to leave it alone.

Thanks
Nick

If your lights are in a warm location I think your seedling will be growing a bit nesh. Have you got an unheated porch or greenhouse, Nick? You could start hardening off your seedling a bit somewhere protected but cool, as long as we don't go back into that cold snap again. Since it's been raised inside I wouldn't put it out yet but I do think it should start learing to toughen up a bit.

Can I ask why you chose to grow from seed rather than a runner, which would be much quicker to fruit? Was it just curiosity? And also wild fruit is likely to be much smaller than a cultivated variety.

Well I went out to my secret wild raspberry loation *wink* and got a few cuttings but they didnt take at all so as a last ditch attempt I planted a few seeds and 2 sprouted, 1 seedling died (ok I confess I killed it by accident) and this other is left, not that I doubt that'll take long at all to improve my 'stock'

My lights arnt incredibly warm or partiularly bright as it was mainly my super cheap winter lettuce raft experiment, which was quite a reasonable sucess, so much so I might do it properly, *sometime*

We are actually having quite a warmish spell here (10C) so maybe its time to pot it up, and put it in the greenhouse and I can always bring it back in if it gets too cold again. :)

Hope it doesnt die *cross fingers*