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PlantFiles: Cream Cups
Platystemon californicus

Family: Papaveraceae (pa-pav-er-AY-see-ee) (Info)
Genus: Platystemon (plat-ee-STEE-mon) (Info)
Species: californicus (kal-ih-FOR-nik-us) (Info)

One vendor has this plant for sale.

6 members have or want this plant for trade.

Alpines and Rock Gardens

6-12 in. (15-30 cm)

9-12 in. (22-30 cm)

Not Applicable

Sun Exposure:
Full Sun


Bloom Color:
Pale Yellow
Bright Yellow

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall


Other details:
May be a noxious weed or invasive
Flowers are fragrant
Drought-tolerant; suitable for xeriscaping
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Soil pH requirements:
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow outdoors in fall
From seed; direct sow after last frost

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds

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By matricesp
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By Kelli
Thumbnail #2 of Platystemon californicus by Kelli

By Kelli
Thumbnail #3 of Platystemon californicus by Kelli

By AnniesAnnuals
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By AnniesAnnuals
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1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive matricesp On Mar 20, 2008, matricesp from San Pedro, CA (Zone 10b) wrote:

bought this plant from a plant sale in January 2008, bloomed late winter in pot and finished blooming a couple weeks ago

Neutral saya On Mar 10, 2005, saya from Heerlen
Netherlands (Zone 8b) wrote:

Seeds should be sown in situ...don 't like to be transplanted.


This plant has been said to grow in the following regions:

Concord, California
Richmond, California
San Jose, California
San Mateo, California

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