Category Archives: Horticulture Reports

Oregon Native: Twinberry Honeysuckle (Lonicera involucrata)

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Plant Name: Lonicera involucrata

Photographer: Beckers, Eric

Common name: Twinberry Honeysuckle
Plant Type:  Deciduous Shrub
Plant Height: 3’ – 8’
Spread: 3’ – 4’
Bloom Time:  March – August
Flower Color:  Yellowish-Orange to Reddish-Purple; Black Berries with Reddish Bracts
Exposure:  Sun – Part Shade – Shade
Soil Requirements:  Moist Loamy/Sandy Soil.
Water Needs: High
Attributes: Attracts Birds, Bumble Bees, Butterflies, Hummingbirds; Deer Resistant.
Note: Berries mildly poisonous.
Uses:  Hedge, Bird & Hummingbird Gardens; Landscape Ornamental.
Native to:   Northern & Western North America.
Oregon Native: YES
USDA Hardiness Zone: 4 – 10

Report by: Viki Ashford

Photo from: https://www.wildflower.org

Oregon Native: Potentilla gracilis (Slender Cinquefoil)

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Plant Name:  Potentilla gracilis
Common name: Slender Cinquefoil
Plant Type: Herbaceous Perennial Wildflower
Plant Height: 1’ – 2’
Spread: 1’ – 2’
Bloom Time: June – September
Flower Color: Golden Yellow
Exposure: Full Sun to Light Shade.
Soil Requirements:  Average, Moist, Well-Drained.
Water Needs: Medium; Drought Tolerant once Established.
Attributes:  Nectar & Pollen Source for Native Bees, Butterflies, Beneficial Insects; Attractive Seed Heads; Fall Foliage Color Interest; Deer Resistant.
Uses: Perennial Garden Border; Cottage Garden; Wildflower Gardens.
Native to:  Canada & Western North America
Oregon Native:   YES
USDA Hardiness Zone:  3 – 7

Report by: Viki Ashford, AGC Member & Master Gardener

Photo credit: Stan Shebs / CC BY-SA (https://creativecommons.org/licenses/by-sa/3.0)

Oregon Native Plant: Ribes nevadense

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Plant Name:  Ribes nevadense
Common name:  Sierra Flowering Currant/Mountain Pink Currant
Plant Type:  Deciduous Multi-Stem Shrub
Plant Height: 3’ – 6’
Spread: 3’
Bloom Time: Late Spring
Flower Color: Soft Pink
Exposure: Sun to Light Shade
Soil Requirements: Tolerates variety of soil with good drainage.
Water Needs: Can tolerate moderate drought, but prefers consistent moisture.
Attributes:  Attracts Bees, Other Insects, Hummingbirds; Host for Butterflies & Moths; Fragrant Flowers.
Uses: Bee, Bird, and Butterfly Gardens; Native Gardens.
Note: The fruit is an edible bluish-black berry, somewhat waxy and studded with glandular hairs. Always get professional advice before consuming wild edibles; in the wild this berry can be confused with poisonous berries in the area. 

Native to:  California, Nevada, Oregon
Oregon Native:  YES
USDA Hardiness Zone:  5 – 8

 

Report by: Viki Ashford, AGC Member & Master Gardener

Photo from:https://www.sevenoaksnativenursery.com/

Oregon Native: Black Hawthorn

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Plant Name:  Crataegus douglasii
Common Name:  Black Hawthorn
Plant Type:  Much-Branched Shrub or Small Tree
Plant Height:  6’ – 30’
Spread:  10’ – 25’
Bloom Time: May – June
Flower Color:  White followed by Blue-Black Berries
Exposure:  Sun – Part Shade – Shade
Soil Requirements: Moist
Water Needs: High
Attributes: Showy Fruits,  A few Birds consume Berries; Attracts Butterflies; Fragrant Flowers; Autumn Foliage; Drought Tolerant.
Note:   Prune in winter or early spring; Susceptible to: Rust, Fireblight, Powdery Mildew, Borers, Leafminers, & Scale.  Cons: Has Prickles & Thorns; Messy Fruits; Suckers Form Thickets. 
Uses: Hedge
Native to:  Alaska to Northern California, Rockies
Oregon Native: YES
USDA Hardiness Zone:  3 – 9

Report by: Viki Ashford

Photo from: Oregon State University Department of Horticulture https://landscapeplants.oregonstate.edu/plants/crataegus-douglasii