Photo by Melody

PlantFiles: Japanese Poppy
Hylomecon japonica

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Family: Papaveraceae (pa-pav-er-AY-see-ee) (Info)
Genus: Hylomecon (hy-LOH-mee-kon) (Info)
Species: japonica (juh-PON-ih-kuh) (Info)

5 members have or want this plant for trade.

Category:
Perennials

Height:
6-12 in. (15-30 cm)

Spacing:
9-12 in. (22-30 cm)

Hardiness:
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Sun to Partial Shade

Danger:
Unknown - Tell us

Bloom Color:
Bright Yellow

Bloom Time:
Late Spring/Early Summer

Foliage:
Unknown - Tell us

Other details:
Unknown - Tell us

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing the rootball
From seed; winter sow in vented containers, coldframe or unheated greenhouse

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By ulfhocke
Thumbnail #1 of Hylomecon japonica by ulfhocke

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive dave12122 On Dec 30, 2010, dave12122 from East Haddam, CT wrote:

A charming ephemeral, fully hardy to zone 6. Makes attractive divided foliage in April, blooms for 2 weeks in May, then is gone for the rest of the year. Sun/light shade (NOT a shade plant) with severe drainage gives the best results. Flowers are attractive, like a miniature yellow poppy. Worth a try!

Regional...

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

East Haddam, Connecticut



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