How to Care for Sweet Pea Plants for Maximum Blooms

Overview

Sweet peas are old-fashioned favorites with colorful, lacy blooms and bright green vines. A cool-weather plant, they fill the gap after spring bulbs fade and before summer flowers emerge. Cutting for arrangements encourages even more blooms.

Care Steps

Step 1: Fertilize at Planting Only

Work balanced granular fertilizer into soil at planting per directions. Don't fertilize later—excess nitrogen promotes foliage over flowers.

Step 2: Mulch for Cool Roots

When plants reach 4–6 inches, spread organic mulch around bases to keep soil cool and moist.

Step 3: Install Support Early

Vines grow 5–10 feet. Install a sturdy trellis, or plant near a wall/fence. Do this while plants are small to avoid root damage. Tie vines with string or stretch ties.

Step 4: Water Consistently

Keep soil moist but not soggy—overwatering causes mold. Water in morning so foliage dries by evening to prevent fungus.

Step 5: Deadhead Daily

Pinch or cut spent flowers daily to prolong blooming. Also cut for long-lasting indoor arrangements.

Step 6: Clean Up After Season

Cut vines to ground level when blooming ends. Leave roots to decompose, enriching soil with nitrogen.