Been wanting to break into these for awhile, and finally got a chance when the ICPS seed bank opened back up in late July. I did some reading, including the stickied thread by Pyro here in this sub-forum, and this settled and filtered out of all the agregate:
They are in a sand-heavy mix with peat, in a very shallow tray, which I fill, then allow to dry for a day or two before refilling.
The light is a 100-watt equivalent CFL bulb with a color temperature of 2700k.
I'm wondering if I should have gone with the 150-watt equivalent (highest I can find), but the actual wattage was twice that of the bulbs I have (40 as opposed to 23).
They're out in the open so that they'll get cooler overall temperatures this winter, probably as low as the mid-forties at night during the coldest times, and the light is on a 12-hour cycle right now. Over the next two months, I plan on trimming it down to 10 hours.
Now....the question is....what am I doing wrong? Because I'm sure it's something. XD
(Edit) the seeds are D. hookeri, btw. I'll also be putting a tuber each of D. modesta and D. menziesii in the same conditions if they're appropriate.