Poker primrose Primula vialii Type Perennial Blooms Red calyces with purple flowers in late spring to early summer Light Part shade (full sun in cool areas) Size 12 to 20 in. tall, 10 to 12 in. wide Cold-hardy USDA zones 5 to 8 Heat-tolerant AHS zones 8 to 1 Source Dutch Gardens
Reliable red barrenwort | Garden Gate eNotes
Lupine Lupinus hybrids Type Perennial Blooms Yellow, deep blue, pink, purple, red, salmon, white, cream and mixed flowers from late spring to midsummer Light Full sun Size 18 to 60 in. tall, 24 to 30 in. wide Cold-hardy USDA zones 4 to 9 Heat-tolerant AHS zones 9 to 1 Source Bluestone Perennials
European wild ginger (Asarum europaeum, USDA Hardiness Zones 4-8) is dark and shiny, and its rounded, overlapping leaves form a thick carpet. It grows up to 3 inches tall and more than 12 inches wide. It prefers partial to full shade and fertile, moist, well-drained, slightly acidic soil.