Romneya Coulteri Seeds – Grow Stunning Giant White Matilija Poppies

Enhance your landscape with the dramatic and elegant blooms of Romneya Coulteri, also known as the Matilija Poppy. Famous for its extra-large, crinkled white petals and bright yellow centers, this perennial is a showstopper in any garden. It thrives in warm climates, tolerates drought once established, and spreads beautifully in open spaces.

Perfect for sunny borders, xeriscapes, cottage gardens, pollinator-friendly gardens, and natural landscaping, these poppies bring a unique, airy texture that stands out from traditional flowering plants.

FEATURES

• Premium-quality Romneya Coulteri seeds

• Produces giant white poppies with crepe-paper texture

• Drought-tolerant once established

• Attractive to pollinating insects

• Excellent for sunny and dry landscapes

• Non-GMO seed quality

• Long-lived perennial

SPECIFICATIONS

• Common Name: Matilija Poppy

• US Common Name: Tree Poppy

• Botanical Name: Romneya coulteri

• Plant Type: Perennial

• Bloom Color: Pure white petals with a yellow center

• Height: 4–8 feet

• Spread: 3–6 feet, depending on conditions

• Light Requirement: Full sun

• Soil Type: Well-drained, sandy or loamy soils

• Watering: Low; drought-tolerant once established

• Hardiness Zones: USDA Zones 7–10

• Bloom Season: Late spring to midsummer

• GMO Status: Non-GMO

• Heirloom: Yes

• Growth Style: Spreading perennial

• Maintenance: Low

PLANTING GUIDE

1. Lightly scarify seeds for improved germination.

2. Sow seeds on the soil surface or barely cover them.

3. Keep soil consistently moist until germination.

4. Maintain temperatures between 65–75°F.

5. Germination may take 30–60 days depending on conditions.

• Transplant seedlings to sunny locations with well-drained soil.

• Space plants 3–5 feet apart to allow room for spreading.

• Water deeply but infrequently once established.

• Avoid overwatering, especially in heavy soils.

• Prune old stems in early spring to encourage vigorous new growth.