Anyone growing Ground Plum, Astragalus crassicarpus?

Anyone growing Astragalus crassicarpus? If so, what are your experiences?
I planted some seeds this year, it's a very slow growing plant. I probably wont get any fruit off of it until next year. Has anyone ever tried it?

I have tried to grow from seed but mine died, like most plants I try to grow.

Going to try again.

oh, bummer. Don't give up!

I've just noticed my three coming up again in the polytunnel.  I've got a bed that I seldom water and it seems to be surviving there.  I assume that the roots are deep enough now they are reaching the bedrock (only a foot or so down) which probably has seepage from outside the tunnel.  This is their third year, so I'm hopeful they may flower.