need suggestion for some shady areas.

[The Velveteen Ocelot]

5. Since your soil is sandy, have you tried blueberries (at least in sunnier spots)?

Most vegetables don't do well in shade, although lettuce, cabbage, other cruciferous vegetables manage a little better - that's because we eat mostly the leaves of those vegetables and not fruiting bodies (like tomatoes, squash family, etc.) which need the sun's energy to grow. I haven't had any luck with asparagus ever since the trees in my yard got big enough to cast shade on the area for half the day.