Japanese Wood Poppy

Glaucidiumpalmatum

Genus
Glaucidium (glah-SID-ee-um)
Species
palmatum (pahl-MAY-tum)
Synonym
Sun Exposure
Partial to Full Shade
Foliage
Herbaceous
Height
18-24 in. (45-60 cm)
Spacing
15-18 in. (38-45 cm)
Hardiness
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
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)
Bloom Color
Rose/Mauve
Bloom Time
Mid Spring
Late Spring/Early Summer
Other Details
Category
Perennials
Water Requirements
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Non-patented
Propagation Methods
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Anchorage, Alaska

Palmer, Alaska

East Haddam, Connecticut

Louisville, Kentucky(2 reports)

Taylorsville, Kentucky

Norway, Maine

Shelburne Falls, Massachusetts

Saint Louis, Missouri

Pequannock, New Jersey

Hillsdale, New York

Wilkes Barre, Pennsylvania

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Gardener's Notes:

2
positives
3
neutrals
0
negative
Sort By:
Sort By:
A
| February 2014 | positive

A treasure in a cool damp climate, where those delicate lilac/lavener poppies last for weeks. Best in well-drained, acidic soil or pure p...Read More

L
Pequannock, NJ (Zone 6b) | January 2014 | neutral

This plant lasted a couple of years. It was a little late to show and went to sleep early. The flowers were pretty but didn't last long. ...Read More

J
Palmer, AK (Zone 3b) | March 2011 | positive

This lovely shade plant has proven hardier than expected. Best results for germination have come from sowing the seeds around the parent ...Read More

D
East Haddam, CT | December 2010 | neutral

This is a hard plant to find in flowering size. If grown as a smaller plant, it can take 3-4 YEARS to flower. Mice find the roots attra...Read More

M
M
Ewing, KY (Zone 6a) | August 2001 | neutral

This perennial is a native of Japan. It grows up to 20 inches high and wide. It has attractive, bright green, paired leaves, which are di...Read More

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