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Dendromecon harfordii
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Channel Islands Tree Poppy
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Dendromecon harfordii
  

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About Channel Islands Tree Poppy (Dendromecon harfordii) A species of flowering plant in the poppy family known by the common names Channel Islands tree poppy and Harford's tree poppy. It is sometimes treated as subspecies harfordii of its relative, Dendromecon rigida. This is a shrub or small tree reaching heights between 2 and 6 meters. It has thin branching stems covered sparsely in smooth-edged, oval-shaped silvery leaves 3 to 8 centimeters long. It bears showy flowers with four bright yellow petals each 2 or 3 centimeters long. The fruit is a curved, cylindrical capsule over 7 centimeters in length.

Channel Island Bush Poppy is spectacularly beautiful, easy to grow and very fast growing. It can grow to 6 feet in two years, and is covered by beautiful yellow flowers most of the year. It likes full sun and well draining soils, though does well in dry part shade also. It likes gentle slopes and flats. They are very tolerant of summer water for their first two years, but when mature, best to cut down to 1x / month or eliminate supplemental water completely, especially if the plant is in part shade.
Plant Description
Plant Type
Shrub

Max. Height
3.5 - 20 ft (1.1 - 6.1 m)

Max. Width
8 ft (2.4 m)

Form
Fountain

Fragrance
None

Growth Rate
Fast

Dormancy
Evergreen

Leaves
Blue green, somewhat slivery, oval and pointed

Flower Color
Yellow

Flowering Season
Spring, Summer, Fall
Spring
Summer
Fall
Winter


Native Status
Native

Natural Setting
Site Type
Chaparral, coastal sage scrub, coastal bluff scrub, and foothill woodland slopes, canyons and flats on the Channel Islands, where the climate is very strongly marine influenced.

Sun
Part Shade, Sun

Elevation ?
7' - 1868'

Annual Precip. ?
11.8" - 22.6"

Summer Precip. ?
0.14" - 0.31"

Coldest Month ?
46.8° F - 57.3° F

Hottest Month ?
62.7° F - 74.8° F

Humidity ?
1.37 vpd - 19.68 vpd

Soil Description
Tolerates sandy or clay soils

Soil PH
5.0 - 8.0

Drainage
Fast, Medium, Slow

Cold Tolerance(° F)
Tolerates cold to 5° F

Sunset Zones ?
7, 8*, 9*, 14*, 15*, 16*, 17*, 18, 19*, 20*, 21*, 22*, 23*, 24*

Companion Plants
Landscaping Information
Ease of Care
Moderately Easy

Water Requirement ?
Very Low
Extremely Low
Very Low
Low
Moderate - High


Popularity
Moderately Popular

Max. Summer Water ?
No Summer Water, 1x/month
No Summer Water
1x/month
2x/month
3x/month
1/week
Keep moist


Mulch
Organic with Rocks

Propagation ?
For propagating by seed: Fire treatment or 1-1.5 mos. stratification ( Hildreth and Tohnson 1976). 3 mos. stratification with a diurnal fluctuation from 46° to 70°F may improve germination. More easily propagated from stem cuttings in winter with intermittent mist and bottom heat.

Common uses
Hedges

Nursery Availability
Sometimes Available

Other Names
Botanical Names
Dendromecon harfordii var. rhamnoides|Dendromecon harfordii var. harfordii

Common Names
Harford's Tree Poppy


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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