Shade plants for zone 6 gardens here are some of the best shade plants for zone 6: bigroot geranium � hardy in zones 4 through 6, this 2-foot tall plant produces pink flowers in the spring and the foliage of some varieties changes color in the fall.. This low-maintenance perennial is a must for any shade garden that can supply moist, rich, well-drained soil. in midspring, the graceful, feathery plumes in pink, red or white complement light green fern-like foliage.. Hardy in zones 6-10 liner plant 10-12" tall, shipped in 3"pot, 1-2 yr old plant big pack - (50,000) mixed pink, blue, white french forget me not, myosotis sylvatica flower seeds - perennial zone 3-9 by myseeds.co (french mixed forget me not - 50,000 seeds).