Just a couple of pictures of Yucca in my USDA zone 4 garden, Ontario, Canada. Thanks to all who provided seed- See the bottom of this message for the hybrids I (think...??) I was able to make this year.
Yucca Gloriosa "Branching" after flowering
Yucca 'Filata' 'Big Mamma; F2 plants
Yucca filata x thompsoniana
Yucca gloriosa in its winter protection
Yucca flaccida x thompsoniana
Yucca 'Kaktusgarten' x elata
Opuntia engelmanii seedlings from a cross Tim made years ago
I have seed from the following for trade or gift! They are either H.P. (Hand pollinated) or O.P. (Open Pollinated). I had blooms on Yucca arkansana, Yucca glauca, Y. glauca v. stricta, Y. gloriosa (4 different plants), and Y. filamentosa. Note- I do have Yucca moths in my garden... None of the crosses onto my glauca v. stricta were takes.
Yucca glauca x Y. gloriosa (Tennessee, best form) H.P.-
Yucca gloriosa (Tennessee, Best form) x Yucca glauca H.P.
Yucca gloriosa (Tennessee seed, mixed, O.P.)
Yucca glauca (O.P.)