Liatris spicata
Blazing Star is an elegant perennial with striking purple flower spikes that bloom from top to bottom. The stiff, vertical stems appear in July and August and provide a wonderful contrast with rounder garden plants. Butterflies and bees adore the nectar-rich flowers.
Plant in full sun in moist but well-drained soil. The plant tolerates short dry spells but performs best with regular watering. Avoid winter waterlogging around the corms. An annual compost dressing in spring promotes flowering.
Leave seed heads standing after flowering for birds. Only cut old stems back to ground level in early spring. Divide the corms every three to four years to keep flowering vigorous.
Echinacea purpurea
Purple Coneflower is a sturdy perennial with distinctive pink-purple petals surrounding an orange-brown cone. The flowers appear from July to September and are a magnet for butterflies and bees. In autumn and winter, the seed heads attract goldfinches and other seed-eating birds.
Rudbeckia fulgida
Black-eyed Susan blooms from July through October with radiant golden-yellow petals surrounding a dark brown center. The plant is virtually indestructible, spreads gradually, and suits large borders and prairie-style gardens. After flowering, the seed heads provide food for birds.
Coreopsis grandiflora
Tickseed is a cheerful perennial that floods the garden with bright yellow daisy-like flowers from June to September. The plant grows compactly and is particularly suited to dry, sunny borders. Butterflies and bees happily visit the blooms.