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California poppy

Eschscholzia californica · Papaveraceae

The gardener's calendar

The right move for September

Ideal time to plant california poppy: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

JFMAMJJASOND Planting

ID card

Origin
California (United States)
Family
Papaveraceae
Plant type
Annual or biennial herbaceous plant
Adult size
30 to 60 cm in height
Flowering
April to October
Foliage
Deciduous, finely cut and bluish
Hardiness
Tender (to be grown in warm temperate climates)
Growth
Fast

Care

Light and exposure

California poppy requires a very sunny location, with at least 6 to 8 hours of direct sunlight per day. Flowers bloom fully in the sun and close in shade or on cloudy days. Choose a south or west-facing exposure for generous and continuous flowering.

Soil and planting

This plant prefers well-draining, light and poor to average soil. Overly rich soils encourage foliage at the expense of flowers. Sandy or rocky soil suits it perfectly. Avoid waterlogged conditions that could cause root rot.

Watering

Water moderately once established. California poppy tolerates drought and only needs watering if the soil is very dry. In pots, keep the substrate slightly moist but never waterlogged. Reduce watering during cold periods.

Fertilizing

Poor to average fertilizer is sufficient; overfertilizing encourages leaves at the expense of flowers. A light application of balanced fertilizer in spring is enough, or even unnecessary if the soil is already fertile.

Pruning and maintenance

Remove spent flowers regularly to extend flowering. Pinch young plants at the few-leaf stage to encourage bushy growth. No drastic pruning is necessary; this plant generally manages on its own.

Pests and diseases

California poppy is very resistant to pests and diseases, especially in well-draining soil. Powdery mildew can occur in humid and warm conditions. Ensure good air circulation and avoid excess moisture to prevent fungal problems.

Did you know?

California poppy has been the official flower of the State of California since 1903 and almost disappeared from France in the 19th century, when it had become popular there. Californians call it the "sleeping poppy" because its petals close at night and in bad weather, a unique behavior that makes it fascinating to observe throughout the day.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.