My experience has been that a cool Spring seems to bring shorter growth-- and, especially if it is a cool, dry spring. On the other hand, a warm spring seems to bring taller growth--and again, especially if it is a warm, wet spring. Just my conclusion based on association. This year when I look at the 'overall', I believe they may be a little taller than average here. But, I've had pretty much an ideal spring as far as lily gardening goes with just the right amount of moisture.
I should note I have a couple exceptions where I have some real turkey-necks on some very large fall transplanted bulbs. Since these were in an area ravaged by voles, I going to assume the main section of these bulbs was damaged but they shot up a spindly stem from a small developing offset somewhere within the bulbs themselves.
This is an interesting question. I just heard from a lady in northern Wisconsin who says all of her newly planted Fall bulbs were taller than she has experienced before. I wonder, also, what everybody else on this forum is experiencing this year.
