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California Poppy
Eschscholzia
California Poppy blooms from May through August.
Mature size, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not.
Growing California Poppy
Plant it in full sun. It prefers low water. It is hardy in USDA zones 6–10. Expect it to reach about 12 in tall and 8 in wide at maturity, in roughly 1 year.
When to plant California Poppy
Wait until all danger of frost has passed, then plant out California Poppy into warm soil; in most zones that means late spring. Planted then, it flowers from May to August.
Month-by-month timing for your zone is on the planting calendar: for the middle of its range, start with zone 8 in March.
Comes in 5 varieties across 4 colors
Same plant, same care - pick the color you are growing.
Good to know about California Poppy
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Only mildly toxic and low risk. Concentrated herbal products can cause mild nausea; a Wildflower Center expert found no listing as poisonous to dogs. per Poison Control and Wildflower Center
Worth knowing
Related to the opium poppy but a different genus: it makes no morphine, which is why its long herbal use as a mild sedative is gentle, not narcotic. per Frontiers and Molecules
Invasive outside its home range
A valued native wildflower in the western US, but a documented invader in Chile, Australia, New Zealand and South Africa. There, deadhead hard to stop seed escape. per Calscape and PLOS ONE
Sow in place, never transplant
It grows a fleshy taproot with long, sensitive roots and resents disturbance, so sow seed directly where it will grow rather than moving seedlings. per NC State
Rich, wet soil kills it
Built for lean, dry, sharply drained ground: rich soil and overwatering give soft, floppy, leafy growth with few flowers, and can rot the crown and roots. per NC State
Flowers close at night
The satiny cups close at night and in cloudy or rainy weather. Petals are usually bright orange but range from creamy yellow to deep orange. per NC State
Deer resistant
Reported deer resistant, likely because of the bitter alkaloids it carries, though rabbits may nibble the foliage. per Calscape and Molecules
What pairs well with California Poppy
Good companions share its growing conditions and add something it lacks: an earlier or later bloom, a lower carpet in front, or structure through winter.
Goldenrod
Shares full sun and low water; overlaps, then carries the display into mid fall; both are strong pollinator plants; its seed heads stand through winter, for structure and the birds.
Aster
Shares full sun and low to moderate water; blooms in early fall as this one finishes; both are strong pollinator plants, and they feed in different months; its seed heads stand through winter, for structure and the birds.
Black-Eyed Susan
Shares full sun and low water; overlaps, then carries the display into early fall; both are strong pollinator plants; its seed heads stand through winter, for structure and the birds.
Rosemary
Shares full sun and low water; opens in early spring and overlaps into this one's season; both are strong pollinator plants; evergreen, so the bed keeps its shape through winter.
Grape Hyacinth
Shares full sun and low water; blooms in early spring, before this one opens; both offer pollinator forage, in different months; lower at 8 in, for the front of the border.
Switchgrass
Shares full sun and low water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; taller at 4.9 ft, for the layer behind it.
Fountain Grass
Shares full sun and low water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; taller at 3.3 ft, for the layer behind it.
Pampas Grass
Shares full sun and low water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; stands well above at 8.2 ft, a canopy to plant beneath.
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