What to grow on the roof?

This page has ten suggestions for earth bermed roofs.  Seems like drought tolerance with earth holding roots that do not try to penetrate too deep would be the criteria. Any experience on the wofai so far?

I would also like suggestions for this. Particularly, I want to integrate the roof into the surrounding environment (forest edge) so I would like some plants that grow to a decent height despite only having enough soil for maybe 6 inches of roots.

Other desirable attributes would be:
- fast growing
- something remaining in the winter

any ideas?

on allerton abbey what i noticed is growing best is clover (all sorts) there are a lot of plants up there but it seams to me that the clover is taking over. at the very top it seams like mostly red clover( i might be wrong it might just look very similar to red clover). it died back a bit last year at the hottest driest point in summer but then as soon as rain came it started doing its thing again.down closer to ground level sweet clover and vetch seam to be taking over the most.

Jon Piper wrote:I would also like suggestions for this. Particularly, I want to integrate the roof into the surrounding environment (forest edge) so I would like some plants that grow to a decent height despite only having enough soil for maybe 6 inches of roots.
Other desirable attributes would be:
- fast growing
- something remaining in the winter
any ideas?

Because you have not filled out your profile it is hard to know what advice would match your location. Please go to the profile button at the top of the page and indicate your location and posibly make a signatrue line with more information.
Basicly you have to go to the forest edge where there is shallow soil availability and see what grows there.
In my area a low grower would be nikinik. For a higher structure with evergreen leaves it would be salal.

Ah.. of course...
Thanks for reply and the tip about my profile.

Central Connecticut - zone 6