California poppy
Also known as
Californian poppy, Golden poppy, Cup of Gold, California sunlight
Keep this plant’s care guide close at hand.
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Eschscholzia californica, the California poppy, is a short-lived perennial often grown as an annual, prized for its satiny, four-petaled blooms in shades of orange, yellow, cream, and occasionally red. Finely divided, blue-green, glaucous foliage forms a low rosette from which wiry stems carry cuplike flowers that open in sun and close at night or in cool, cloudy weather. Native to the western United States and Baja California, it thrives in lean, well-drained soils and is exceptionally drought tolerant once established. A long taproot helps it access deep moisture, but also makes it resent disturbance and transplanting. Flowers attract bees and other pollinators, and plants readily self-seed to naturalize in suitable sites, creating seasonal carpets of color from spring into early summer, with possible rebloom in fall where summers are not excessively hot. It is a signature species of water-wise meadows, roadside restorations, and coastal gardens.
Taxonomy
Properties & Requirements
How to care for California poppy
Water
Keep the seedbed evenly moist (not soggy) until seedlings are established. Once plants have several true leaves, transition to deep, infrequent watering. In the ground, water only during extended dry spells, soaking the soil 6–8 inches deep and letting it dry fully between cycles. Containers dry faster and may need watering when the top 1–2 inches are dry, but ensure excellent drainage. Overwatering reduces bloom, invites root issues, and shortens plant life—err on the dry side after establishment.
Light
Provide full sun for best flowering—aim for 6–8+ hours of direct light daily. In coastal or temperate regions, all-day sun is ideal. In very hot inland climates, light afternoon shade can reduce heat stress without severely reducing bloom. Too much shade leads to lanky growth and sparse flowers. California poppy is not well suited to indoor culture; if attempted in containers, place in the sunniest outdoor location available.
Nutrients
California poppy is a light feeder that performs best in lean, well-drained soils. Excess nitrogen encourages lush foliage at the expense of flowers and can cause floppy growth. For in-ground plantings, skip fertilizer or mix a small amount of compost into poor soils before sowing. In containers, apply a very dilute, balanced fertilizer (e.g., 5-10-5 or 10-10-10 at 1/4 strength) once early in growth, then stop. Avoid high-phosphorus bloom boosters and never fertilize stressed or droughted plants.
Temperature
Best flowering occurs in cool to mild weather, roughly 50–75°F (10–24°C). Plants tolerate light frosts as rosettes and can overwinter as short-lived perennials in USDA Zones 6–10 with good drainage. Hard freezes may kill tops, but reseeding is common. Intense heat (above ~90–95°F/32–35°C) can pause flowering; bloom often resumes with cooler nights or fall rains. Avoid humid, stagnant conditions; provide air circulation. No special indoor temperature care is needed since it’s typically grown outdoors.
