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Romneya Coulteri Flower Seeds – Tree Poppy for Planting

Romneya Coulteri Flower Seeds – Tree Poppy for Planting

$16.79 USD
$16.79 USD
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How to Sow and Plant

Sow Romneya Coulteri seeds in well-drained soil during the warm season. Lightly press seeds into the soil surface without covering deeply, as they need light to germinate. Water gently to keep the soil moist but not soggy. Germination may be slow, so patience is required. Transplant seedlings carefully as the plant dislikes root disturbance.

How to Grow

Grow Romneya Coulteri in full sunlight for best flowering. Choose a location with excellent drainage to prevent root rot. Water moderately during early growth stages, then reduce watering once established. Avoid excessive fertilization, as it prefers lean soil. Minimal pruning is needed—remove dead stems after flowering to maintain plant health.

Tips

Plant in a permanent location due to deep roots
Requires full sun for maximum blooms
Avoid overwatering once established
Best suited for open garden spaces
Ideal for ornamental and pollinator gardens

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About
Product Information
Features
life-cycle

Life Cycle

Perennial

plant-characteristics

Plant Characteristics

Golden centers

growth-habit

Growth Habit

Spreading

bloom-season

Bloom Season

Late Spring

flavour-profile

Flavour Profile

Ornamental

suitable-for

Suitable for

Outdoor

About
Romneya Coulteri Flower Seeds – Tree Poppy for Planting
seed-type

Seed Type

Open Pollinated

plant-type

Plant Type

Flowering Plant

Romneya Coulteri is a striking perennial ornamental flower native to California, famous for its large white poppy-like blooms. The plant develops deep roots and spreads gradually, making it ideal for open landscapes and ornamental borders. Its flowers attract bees and butterflies, enhancing garden biodiversity. Once established, it becomes drought tolerant and low maintenance, offering dramatic blooms year after year.

Planting information
planting-season

Planting Season

Spring

fruit-size

Fruit Size

N/A

plant-height

Plant Height

5–8 Feet

light-requirement

Light Requirement

Full Sun

water-needs

Water Needs

Low to Moderate

hardiness-zones

Hardiness Zones

USDA Zones 8–10

container-garden

Container Garden

No

plant-spacing

Plant Spacing

4–6 Feet

planting-depth

Planting Depth

Surface Sow

growing-conditions

Growing Conditions

Well-drained soil

Coverage
Seed Count
Recommended Coverage
Seed Count
100
GTIN
036000136302

Frequently Asked Questions

Can Romneya Coulteri spread beyond its original planting area?

Yes. It has a spreading habit and deep roots, so choose a permanent location with enough space rather than a confined planting site.

Why is Romneya Coulteri unsuitable for containers?

The plant develops deep roots and spreads gradually. The product page specifically recommends open garden spaces rather than container cultivation.

Can Tree Poppy be used in a pollinator garden?

Yes. Its large white flowers can attract bees and butterflies, making it suitable for ornamental and pollinator-focused garden designs.

What companion plants work with Romneya Coulteri?

Choose plants that tolerate full sun and relatively dry conditions. Give the Tree Poppy enough room so its spreading growth does not crowd smaller plants.

How can Romneya Coulteri fit a low-water landscape?

Once established, it is described as drought tolerant. It can suit dry garden designs where full sun and well-drained conditions are available.

Why should Tree Poppy be planted in its permanent location?

Deep roots can make later relocation difficult. Selecting a spacious, sunny site before planting reduces the need to disturb the established root system.