How to Plant Iris Flowers for Spectacular Blooms

Irises are sun-loving plants that create dazzling displays in late spring or early summer with free-floating blooms amid deep green foliage. Colors range from traditional purple to brilliant blue, yellow, and white. They spread quickly, returning each spring larger and more colorful.

Step 1: Choose a Sunny Location

Select a spot with 6–8 hours of direct sunlight daily. Partial shade reduces size and bloom color.

Step 2: Prepare Well-Drained Soil

Till a bed 6–8 inches deep. Add well-rotted manure or compost to improve drainage and texture. Mix thoroughly.

Step 3: Plant Rhizomes Correctly

Plant from spring to late summer for next season's blooms. Place so the top third of the rhizome is above soil line. These fibrous roots prefer sun and spread along the surface. Water thoroughly, allow soil to dry slightly between waterings. Apply water-soluble fertilizer monthly during active growth.

Step 4: Control Weeds

Remove young weeds as they emerge. Hand-pull grass between bulbs. Eventually grass roots cease sending new shoots.

Step 5: Divide Overgrown Clumps

Divide in late summer or early fall when overgrown (usually every 3–4 years). When rhizomes crowd and blooming decreases, it's time.

Step 6: Lift and Replant Divisions

Dig under with a garden fork, lift free. Pull rhizomes apart gently or cut with a sharp knife. Leave a fan of foliage and several roots on each. Cut foliage back to 6 inches. Replant in similar location, water thoroughly for root formation.

Follow these steps for thriving, multiplying iris displays.