I dont let mine drop below 70F...they got deformed looking when I did that on the first batch..coupled with the low light and cooler temps

Winterlager,
Perhaps my experience will give you some guidance. I grow my seedlings under flourescent lights in my greenhouse, which is currently recording a temperature of 58F. No doubt they germinate and grow more slowly in the winter than they would in Florida, but I can't harvest the seed in the fall when it's ripe, and then store it and hope that it's fresh enough to give good germination in the spring. Freshly planted pots of seed I will often place on top of the flourescent fixtures for bottom heat until the seed shows signs of germination. Here are some seedlings that were planted 8 weeks ago-

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I'm not surprised if HDD is laughing at this right now. Although, HDD will probably vouch for me that the results have been at least halfway decent.
I'll start fertilizing in about 4-6 weeks as things begin to warm up around here. Sometime between June and August, they'll be large enough to start potting individually.
Paul

I'm tempted to put mine in a plastic container and float them in my solar heated pool under the pool blanket. I'm just concerned that the chlorine fumes that build up under the blanket might be bad for them. The pool stays at least 75 this time of year and will hit 90 once in a while.

I don't think you need to go to those extremes. I would love 60s at night, and you'll be warming up nicely there pretty soon.

Paul no way I'm laughing..growing seedlings in winter is a b***h...and Pauls hybrids are great..don't let him kid you
I'm using full spectrum lighting as a back up when its to cool here for seedlings to go outdoors, seedling mats(best investment I have made and use 9 watts of power per 9 X 19 inch mat, good bottom heat source)
Winter I don't know about the pool idea. I would be afraid of an air circulation problem (fungus)over the chlorine effects.
I started winter with roughly 750 seedlings...so far I have lost 40(weaklings)
I fertilize when seedlings have hardened off and have 4 leaves
I started some neo seeds 8 days ago..that were sent to me that were harvested in July 07...may not germinate even after removing the caps

I get good germination and growth under 14 hours fluorescent light and a heat mat at 24C (75F). Germination takes about three weeks this way and my seedlings grow good.

To test the difference I placed half of my Alcantarea seedlings in natural light at 15C (60F) for some weeks and they grow much slower. So now they are back in the lightbox.

Sander

I do'nt not have special-purpose processing
In this of mine, low-temperature Centigrade the most 7-10
The majority can be spent safely
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My seeds usually sprout in 7-10 days. These Lueddemanniana are 11 days old. I planted them the day after Christmas (I ran out of sphagnum peat moss mix and just used regular potting soil) and when the cold front hit on the 2nd of January I hid them in a warmish dark place for 2 days. I'm thinking warmth is more important than light for the first few weeks.

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