I made the following cross today: Forsyth Summer Snow X Gentle Shepherd. If the cross is successful, anyone interested in growing these seeds, let me know. I will be happy to share them. Forsyth Summer Snow is not as white as Gentle Shepherd but it is a very vigorous plant that blooms profusely with some blooms at 7" across. Its foliage is very nice dark green and it sets pods very easily too.
Forsyth Summer Snow