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Shallow planting area circa 4 inches deep

We moved to a new house last summer, just starting to do things with some of the beds.  I dug up a Sedum Autumn Joy to discover that part of the bed is basically on what seems to be an area of concrete hard standing.

The Sedum seemed happy enough on this shallow area.  It is quite shady so I was planning to plant hostas, hellebore and some dicentra alba.  I'm unsure now whether to plant them there and would love some ideas for shady plants that don't need a lot of root space and I would imagine poorish drainage......

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  • DovefromaboveDovefromabove Central Norfolk UKPosts: 77,407
    You can’t grow hellebores and hostas in only 4” of soil depth. Sounds ideal for sedums  :)
    “I am not lost, for I know where I am. But however, where I am may be lost.” Winnie the Pooh







  • BobTheGardenerBobTheGardener Leicestershire, UKPosts: 11,336
    edited January 2019
    Depending on the drainage, any of the plants recommended for a 'green roof' should be OK.  Personally, I'd investigate further and consider have a border elsewhere if it does turn out to be buried hard standing - you seem to have a lot of space there. :)
    A trowel in the hand is worth a thousand lost under a bush.
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