what are optimal temps for deflasked phal seedlings?

[Rowangreen]

I have a mix of seedlings including some phals (heiroglyphica X Kenneth Schubert). I've been aiming at 22C, but it's varied between 26 and as low as 18. Phals have shown good growth since coming out of flask about a month ago! I do have a heat mat, but I've not been leaving it on as I've been worrying if it goes about 25!

Interesting if the phals could actually benifit from it being higher: but I guess I will keep things as they are as other seedlings might not apreciate it. I guess the temps you had before were definitely OK (maybe depending on what species or cross you have?) but if the information you have leads you to think higher will be better...

Re humidity: I had some advice from a real life expert that keeping the humidity high at first is very important. My trays seem to give 100% humidity, so I've been leaving the top off for some time and gradually increasing that: they are now doing all evening going down into the 60's. If yours have been out for a while I guess there's no problem, but I think I'd be cautious about extra heat if you can't maintain humidity with it?