Category Archives: Horticulture Reports

Horticulture Report: Dutchman’s Pipe

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Plant Name:  Aristolochia californica

Common name:  Dutchman’s Pipe

Plant type:  Deciduous Vine

Height:  10- 15 (up to 20 feet), plant requires a trellis, or other vertical support.

Bloom Time:  Later winter/Early Spring  

Flower Color:  Flowers are pale Green with dark maroon veins. Flowers are shaped like curved pipes with a flared bowl.

Exposure:  Part Shade

Soil Requirements: Tolerates most soils   

Water Needs:  Somewhat drought tolerant, but likes moisture areas; in nature is grows in moist wooded areas, alongside creeks and streams.

Attributes: Heart-shaped leaves on woody stems. Musty odious flowers attract carrion-feeding flies & gnats for pollination; insects eventually escape after plant attaches pollen to them. Plant is host for native Pipevine Swallowtail Butterfly (Battus philenor). Aristolochia californica is the only food source of the Pipevine Swallowtail!  Dutchman ’s Pipe provides habitat for other beneficial insects.

Firewise:  Unable to determine

Native to: Sacramento Valley, Northern Sierra Nevada foothills, San Francisco Bay Area, Northern Inner California Coast Ranges, Southeastern Klamath Mountains

USDA Hardiness Zone: 8 -10

Report by: Carlotta Lucas, AGC Member

Photo of Flowers By: peganum from Small Dole, England – Aristolochia californica, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=47474436

Photo of Pipevine Swallowtail caterpillar by: Joanie Kintscher, AGC Member & Past President

Horticulture Report: Hesperantha Coccinea

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Plant Name: Hesperantha Coccinea
(Previously known as Schizostylis Coccinea)
Common Name: Kaffir Lily, River Lily
Plant Type: Herbaceous Perennial
Flower Color: Pale Pink, Dark Pink, Crimson, White, Orange, Red, Pale Purple
Bloom Time: Late Summer to Early Winter
Foliage Color: Blue-Green, semi-evergreen
Sun Exposure: Full Sun – Part Sun
Water Requirements: Evenly moist soil; do not let dry out
Height: 24-36 in
Spacing: 9-12 in
Hardiness: 7a to 9b
Uses: Cut flowers, Along stream beds, By Ponds & Creeks, Perennial flowerbeds, Borders, Mediterranean Gardens
Attributes: Gladiolus-like flowers appear on spikes; Likes moisture; Tolerates poor soil; Grows in clumps
Native to: South Africa

Firewise Plant: Evening Primrose

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Plant Name:  Oenothera species

Common name:  Evening Primrose
Plant Type: Herbaceous Perennial or Biennial
Plant Height: 2’ – 6’
Plant Width:  1’ – 2’
Bloom Time: Spring, Summer, Fall
Flower Color:  Yellow or Pink or White
Exposure:  Sun to Shade
Soil Requirements: Rocky or Sandy Soil; Well-Drained
Water Needs: Low to Medium
Fire Resistant: YES; Zone 8 – Plant 30’+ from Structure
Attributes: Attract Moths; Birds Eat Seeds; Attracts Hummingbirds; Fragrant Flowers; Deer Resistant; Drought Tolerant
Uses: Full Sun Ground cover; Rock Gardens; Erosion Control; Native Plant Gardens
Note: Flowers Open in the Evening
Native to: Eastern North America
Oregon Native:  NO
USDA Hardiness Zone:  3 – 8

Report by: Viki Ashford, AGC Member & Master Gardener

Firewise Plant: Muscari armeniacum Grape Hyacinth

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Plant Name:  Muscari armeniacum
Common name:  Grape Hyacinth
Plant Type: Bulbous Perennial
Plant Height: .5’ – .75’
Plant Width:  .25’ – .50’
Bloom Time: April
Flower Color:  Royal Blue with thin White Rim
Exposure:  Full Sun to Part Shade
Soil Requirements: Well Drained; Sandy; Loam
Water Needs: Medium
Fire Resistant:  YES; Zone 10 – Plant 10’+ from structure.
Attributes: Showy Flower; Fragrant; Good Cut Flower; Deer Resistant; Tolerates Clay Soil; Attracts Bees/Butterflies.
Uses: Mass in Open Areas; Around Shrubs; Under Deciduous Trees; Rock Gardens; Front of the Border; Container Plant.
Note:  Reduce Watering After Foliage Begins to Die Back.
Native to: Western Asia, Southeastern Europe
Oregon Native:  NO
USDA Hardiness Zone:  4 – 8

Report by: Viki Ashford, AGC Member, Master Gardener

Photo by (c)2008 Derek Ramsey (Ram-Man), GFDL 1.2 http://www.gnu.org/licenses/old-licenses/fdl-1.2.html, via Wikimedia Commons