Re: Yucca blooms are emerging..............
The "blue color" on Yuccas and Agaves is usually very much washed of by rain here, but there are also genetic differences. When I chose the seedlings which i will grow to maturity here in our garden, I chose the most blue forms, a few mediate forms and a few of the palest forms also. We usually start with 10-15 plants in the first selection, and end up with 3-8 clones of the best of the first selection. Of the fibrous yuccas I always chose the most "hairy" ones, I don't have much hair my self, but some of the Yucca does :-) . The most promising hairy we grow is a hybrid pollinated with pollen from your Yucca arkansana ssp. fremanii.
The photos is from 2014, I hope they will grow well this year.
I will keep you informed as the Yucca filamentosa 'Tenn' x (reverschonii x thompsoniana fh1180.8) grows on, it will most likely really take off from tuesday then the temperature goes above 20C and later in next week maybe up to 28C (This is a very rare high temperature here in our part of the world).
Have a nice sunday