Helen Campbell Cleome Seeds - Flower, 30 seeds

Quantity: 30 Seeds / pack

Helen Campbell is a white-flowered spider flower (Cleome hassleriana) that sends up tall, airy stems topped with large, spidery white blooms. Reaching 3–5 feet, it adds height and movement to the back of summer borders and makes a striking cut flower.

Why choose our seeds?

• Large, spidery white blooms on tall, airy 3–5 foot stems
• Long bloom season from early summer until frost
• Dramatic back-of-border plant and excellent cut flower

How to grow Helen Campbell Cleome seeds

Choose Your Planting Method

• Indoors: Sow indoors 6–8 weeks before the last frost.
• Outdoors: Direct sow outdoors 1–2 weeks before the last spring frost date.

Prepare Your Materials

• Seed-starting trays or pots (if indoors)
• Well-draining potting mix
• Spray bottle for misting

Sowing the Seeds

• Surface-sow and press in lightly — cleome seeds need light to germinate.
• Chilling the sown tray in the refrigerator for about 2 weeks before warming can improve germination.

Provide the Right Conditions

• Light: Bright light; seedlings need strong light to grow stocky.
• Temperature: Around 60–70°F (16–21°C).

Germination

• Seedlings usually appear in 10–21 days.
• Grow on in a bright spot until plants are sturdy enough to plant out.

Transplanting

• Set out after the last frost.
• Harden off indoor-started plants for a week before planting out.
• Spacing: Space plants 18–24 inches (45–60 cm) apart.

Care Tips

• Sun: Full sun in regular, well-drained soil.
• Water: Water regularly until established; afterwards water only during dry spells.
• Fertilizer: Mix a couple of inches of compost into the soil before planting.
• Pinch once when plants are about 6 inches tall for bushier plants; note the small thorns on the stems when handling.

Bloom Time:

Blooms from early summer until frost, about 12 weeks from sowing.