Hello all,
First post. Great site. Read an older post and thought the group would like to see some pictures. I have two flats that have been under a clear lid outside under the shade of a porch. I decided to give one some air and direct sun for short period of time. Good idea or not?

I filled a mason jar with dry crush granite and 10,000 seeds. Gently shook the jar and then spread evenly. I got results but the germination rate is low. Typical? Are they even sedum seedlings?

Would like to start a green roof. Interested in starting much more. Suggestions for better germination rate are welcomed.
Thanks for any help

Hi Inkidu, and to NGA.
They look like they may be sedum seedlings, but look like they need more light. They look very spindly. If the seeds are a mix of different sedum they can emerge at different times. Some take longer to germinate. Now comes the tricky part, don't let them dry out. But you also don't want to drown them.
Please keep us up to date on your progress. It will be interesting to watch them grow.

valleylynn said: Now comes the tricky part, don't let them dry out. But you also don't want to drown them.

Thanks for the reply,

I checked on them and noticed the flat, with a flat Oasis sheet, was noticeably lighter. Seem to catch it quick enough and it was only in the mid 60's today. I thought they looked spindly myself. Not wanted to risk them drying out again, I thinking I'll keep the lid on for now. I understand that their drought tolerant and like the sun but there is a limit for something so small. Would 5-8 hours of direct sun with the lid on be too much? Maybe a gradual introduction to the sun might be better?

Thanks for any help

I think right now direct sun might fry them. But they do need very bright light. Maybe a couple of hours of early morning sun? I have never grown sedum from seed, other than using the winter sow method. Had great results with that.

valleylynn said:Hi Inkidu, and to NGA.
Now comes the tricky part, don't let them dry out. But you also don't want to drown them.
Please keep us up to date on your progress. It will be interesting to watch them grow.

A year later (not a complete loss, but close)

Try try again, Better this time so far.

And my first attempts at a grow out bed/proof of concept modular green roof setup.
Some concerns of the long term durability of the perlite and expanded clay after repeated freeze thaw cycles. It would never be walked on.



Any suggestions on where to post a DIY green roof thread?
Thanks for any help.

Wow, you've been busy.
This would be a good Forum to post a DIY. https://garden.org/forums/view...