Re: Yucca blooms & more
WOW, all your Yuccas looks fantastic. and I really like all your super tall forms. Don't you have any wind where you live?, or are the hybrids very strong at the base of the plants. Where I live the tallest blooming Yucca in our garden is Yucca flaccida, it's only 180 cm tall in good years, but the rosettes has has a very weak base, so the plants tilt over in just a little hard wind, and since we live in one of the most windy areas in Denmark, they always need support.
I have a suggestion, which you probably already made have your self, but maybe you should try to make the cross:
Yucca cernua tall bloom forming x (flaccida x 'reverchonii-thompsoniana').
The hybrid plants of such cross might give plants quite similar to Yucca cernua, but with a better tolerance for moisture.
And of course cross the tall once with each other :-).
Your specimen of my hybrid Yucca filamentosa x rostrata does indeed look very nice with the very visible spiral growing pattern and the cool "blue" color.
in 2 weeks or so the Yucca blooming season starts here, so if you have any pollen left at that time, I could use some tall American hybrid genes :-)
There will not be many blooming Yuccas here this year, the last 4 winters and last years very cold summer, has sat their mark on almost everything in the garden (This summer is not much better or maybe worse compared with the temperature ..... day temps highs between 14C and 18C....). I think, that the first to bloom will be a small hybrid Yucca filamentosa sp. (big blue form) x glauca. It's one of my first hybrids from 2003, it was sown in 2004, it also bloomed 2 years ago, so it's a good bloomer. And it would be really interesting to cross with your cernua and some of your other tall forms. The "mother" for the hybrid a big blue form of the filamentosa-flaccida complex will also bloom this year, it's a super strong Yucca, and would also be a good candidate to cross with your tall Yuccas and maybe Yucca reverchonii-thomsoniana (your plant has good pollen I know :-)).
Keep up the good work and have a nice weekend