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Ornamental Pepper ‘Black Pearl’ is an annual with purplish-black leaves. ‘Black Pearl’ grows 18 to 20 inches tall and sports clusters of little black (hot!) peppers that mature to bright red:
‘Jungle Beauty’ is a dormant daylily with blackish-red, 5.5-inch flowers on 30-inch-tall scapes. You can really set off the dark flowers by planting them with yellow daylilies or other yellow flowers.
Heuchera ‘Blackout’ has almost-black leaves. This perennial grows 6 inches tall with 10-inch cream-colored flower scapes that appear in early summer:
