"Not very much - about 50mm (and less than that in places). A mix of vermiculite, compost and loamy soil on wettened thickish cardboard. Having checked its condition recently, I need to add more organic material as the polythene sheet is now visible…"
"Of course! My mistake. It's put the idea of Toad Lily into my mind though, and would probably enjoy my generally damp climate, somewhere in the garden. There is a 'bald' patch in the middle of the green roof this year and Toad Flax…"
"Sound advice and great pics, Rose. I have been monitoring my green roof on the old pigsty here in Gwynedd. The Sedums coped well during a rare 11 day rain-free period earlier in the spring, my geraniums less so; although they came back to life again…"
Welcome mark, good to see that the welsh map is filling a little. i hope life isnt too harsh as of today with this snow. im working out of colwyn bay, a little milder here. drop me line if your around , any Qs any time. i would be intested in sharing your design experience i enjoyed a Landscape Archetect course at mmu