Papaver heterophyllum Plant Care

Papaver heterophyllum (Papaver heterophyllum) belongs to the Papaveraceae family within the Papaver genus. Papaver heterophyllum is native to the western California Floristic Province and known to grow in the area starting from the San Francisco Bay Area of Central Western California southwards to northwestern Baja California, Mexico.

Papaver heterophyllum displays an upright, clumping perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Papaver heterophyllum produces large, colorful bowl-shaped flowers in shades of red, orange, pink, or white.

Leaf size: approximately 4 inches.

Papaver heterophyllum requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Papaver heterophyllum thrives in full sun to partial shade.

Papaver heterophyllum grows best at temperatures of 50–75°F. Papaver heterophyllum prefers humidity levels of 40–60%.

Well-draining, fertile soil with good organic content. Good drainage is essential for Papaver heterophyllum to prevent waterlogging, which leads to root rot and fungal issues.

Feed Papaver heterophyllum every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.

Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Papaver heterophyllum can be propagated through seeds. Similar propagation techniques also apply to long-headed poppy plant care, which shares the same genus.

See all plants toxic to cats and plants toxic to dogs.

Papaver heterophyllum is susceptible to aphids, slugs, snails. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Papaver heterophyllum grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Papaver heterophyllum is native to the western California Floristic Province and known to grow in the area starting from the San Francisco Bay Area of Central Western California southwards to northwestern Baja California, Mexico. In cooler regions, grow Papaver heterophyllum as a houseplant or bring it indoors before the first frost.