"Mike" wrote in message
...
A friend has a small courtyard overshadowed by Sycamores ,as you
know they
deposit sticky residue over everything beneath in the summer .
Attempts to grow normal plants has failed ,has anyone any
suggestions ,as
the trees are staying put.

I have a dense Acer pensylvanicum in whose shade Hostas, Geranium
sanguineum Lancastriense and Viola labradorica are doing well.

Franz