beecrofter expounded:

If you want color you are probably going to have to move pots of
flowering plants in and out of the shade to maintain blooming.

I second the pots. You can do beautiful things in pots with all of
the standard shade annuals like impatiens, coleus, and now a host of
other shade-tolerant plants. You'll never get much go grow amongst
the roots of the maples.
--
Ann, gardening in Zone 6a
South of Boston, Massachusetts
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