Scarifying is actually pretty easy - just rub lightly with medium sandpaper until you are through the seed coat in one spot. I believe they also need stratifying (cold) so I would plant several seeds to a pot and leave them outside over the winter, not letting them dry out and protecting them from foraging squirrels, etc. You should get sprouts over the spring months - but don't give up on them if it takes until summer or even the next spring.

If you want to grow one of the cultivars, be aware that seedlings may not come true - the leaf color of 'Forest Pansy' seedlings can vary, and I would imagine the colors of the blooms of the other selections may vary as well. It may be more interesting, but it may not be the same as the parent tree.

Not sure where you'd get seed for this

;-)

Here is a link that might be useful: {{gwi:441967}}

i used a paper or metal nail file to scratch the coat ... more control than a big sheet of sandpaper ... or any gentle [vs course] wood file .... ken