Our regular domes are not tall enough for vigorous seedlings like cucurbits and tomatoes: these larger plants will be pushing against the underside of regular domes almost as soon as they sprout! To continue to offer extra warmth and protection to these crops after germination, try these 7"-high domes that fit neatly over a standard 1020 tray (and somewhat less neatly, but still effectively, over a heavy duty tray).
If you're grafting nightshades or cucurbits, you can use these high domes as the “healing chamber.” Two dial-type vents on the top of the dome allow you to manage the humidity. If you live in a cold drafty farmhouse like I do, your young plants will appreciate the extra dome time. 11½x22x7".