How are blooms measured? It seems there could be a lot of variation in size depending on how open the plant is when you measure it.

Good question! I've wanted to know the answer to that myself, and I could never remember to ask! Hopefully someone will come along and let us both know!

Here are the American Hemerocallis Society guidelines for measuring, outlined in their "Registering a Daylily" section, for both traditional and spider-forms:

http://www.daylilies.org/AHSre...

You can scroll down or use your search bar to find:

DIAMETER OF FLOWER IN INCHES AS NATURALLY STANDING
FLOWER FORM (SPIDER)

Hope this helps!

Thanks Tina! Now things make more sense on the registered size of blooms! I've always thought that some were listed as being much smaller than what I thought they were, but if you aren't "flattening" out the bloom, I can see where the numbers come from!

ok, does this mean you look at the flower and hold up a tapemeasure superimposed over the circle of bloom? As if you had a life sized head on photo? So long trumpet shapes would be only what you see from the top open area? UFs and spiders would not take the part of the petal curved back as part of the measurement?

Spiders are measured differently

http://www.daylilies.org/ahs_d...

I've always just measured the bud before blooming and doubled it.

I have never heard this method before. Where did you hear this? I think I will try it!