The California poppy, also known as golden poppy, is a short-lived perennial in USDA zones 8-11 that is often grown as an eye-catching annual elsewhere, available not only with its signature orange flowers but also in the form of other colorful cultivars. California poppies prefer full sun and happily grow in a variety of soil types, bringing pollinators wherever you plant them.

When planting, keep in mind that California poppies are toxic to people and animals.

California Poppy Care

Here are the main care requirements for growing California poppies:

• Choose a sunny location that gets at least six hours of direct sunlight.
• Plant in sandy, well-drained soil.
• Water sporadically; only needs occasional water.
• No fertilization is needed, especially when growing as an annual.
• Deadhead for more blooms or leave heads on for reseeding for the next growing season.

Light

California poppies grow and bloom best in full sun, meaning at least six hours of direct sunlight on most days. The more sunlight, the better. Poppies grown in shady conditions often look ragged and easily succumb to diseases. 

Soil

Many flowers need rich, loamy soil, but California poppies can thrive in poor soils. Sandy and rocky soils both provide suitable conditions for California poppies. Heavy clay soil doesn't work because these plants need sharp soil drainage. Try planting in a raised garden bed or container if you have clay soil.

Water

California poppies require very little water and are good candidates for drought-tolerant xeriscapes. Sporadic spring rainfall is usually adequate to irrigate the plants. In areas with hot summers, the plants will often go dormant and need no additional irrigation during this time.

Temperature and Humidity

The warming of the soil in the spring, combined with moisture from the spring rain, will trigger the germination of California poppy seeds. California poppies will continue to grow as long as temperatures remain mild, between 50 and 75 degrees Fahrenheit. Excessive heat can cause dormancy.

However, when cool temperatures return, the plants often will regrow and even rebloom. Moreover, California poppies prefer low to moderate humidity levels. In high humidity, good soil drainage and airflow around the plants are essential for them to stay healthy.

Fertilizer

No fertilizer is necessary to successfully grow California poppies, even in areas with nutrient-poor soil. Adding chemical fertilizers can cause excess foliage growth at the expense of blooms.