Here's my Royal Dwarf at about 44 days. I don't think stretching is particularly harmful, but you'll have sparse buds and those at the bottom won't be too big. My Chronic Ryder is 8'' and essentially a cola growing out of the ground. I should have gone with at least a gallon for the Dwarf but I had to make due. Actually, all my plants are 8-9'' tall. I attribute to the crazy ass veg I gave them.