Darn! I thought my seed purchase process was complete and then I saw this on the Harris Seed site.
Since I've never seen it before, I'll pass along what Harris said about it and provide the link
- just in case your shopping isn't quite over yet, either.
Harris Seed - 50 seeds $9.80
A Fantastic Foliage® selection. The superb foliage of this begonia combines majestic beauty with strength and durability to make an outstanding presentation in single or combination containers.
The multiseed pellets germinate easily and will produce plants that are more tolerant to stressful conditions than Rex begonias, and size up more quickly than vegetative foliage type begonias.
Easy-care Gryphon has low water needs and produces showy displays, making it a great item for both outdoor and indoor gardens.
For home gardeners who want to grow their own from seed, figure 8-9 weeks from sow to transplant into a 4-5 inch pot.
Grow it on for another 5-6 weeks, and then you’ll want to move it into your large container. (We used whiskey barrels here at the company.)
Once the plants are established you’ll find that Gryphon’s water needs are not too demanding and you’ll still get a very vigorous and showy plant. The breeder claims the plants can also be brought indoors, so I’ve already brought my planter at home inside to see how it fares over the winter months.
Here's a YouTube video - you'll get a sense of the size to expect Gryphon to become - smallish in a pot at the beginning of the video, then a full size one at the end.
Has anyone grown this from seed or succeeded with plants?