Tag Archives: AGC Horticulture Report

Horticulture Report: Sedums

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Plant Name:  Sedum species
Common name:  Sedum or Stonecrops
Plant Type:  Perennial Succulent
Plant Height:  2” – 12”; Varies Depending on Varieties:  Ground Cover Level to Upright
Plant Width:  6” – 24”
Bloom Time:  Summer, Fall
Flower Color: Pink, Red, White, Yellow (Depends on Variety)
Exposure: Full Sun to Part Sun
Soil Requirements: Loamy, Sandy, Well Draining.
Water Need:  Low; Drought Tolerant Once Established.
Fire Resistant: YES; 10” or more from house.
Attributes: Attracts Birds/Butterflies; Foliage in Shades of Green to Blue/Chartreuse to Pink; Deer Resistant
Uses: Rock Garden; Edging; Containers, Smaller varieties ground cover.
Note: Deadhead After Flowering to Maintain Shape & Size; or Leave Attractive Seed Heads for Winter Interest; Subject to Mealybugs, Scale, Slugs/Snails, Powdery Mildew.
Native to: Eastern United States
Oregon Native:  Some varieties of Sedum spathulifolium and other broadleaf stonecrop are native to Oregon
USDA Hardiness Zone: 3 – 10

Report by: Viki Ashford, AGC Member

Autumn Joy Sedum and Broad-Leaf Sedum Photos by: Carlotta Lucas, AGC Member

Sedum oreganum (Yellow flowers) photo by: Stan Shebs https://calscape.org/loc-california/Sedum%20oreganum()

Horticulture Report: Sempervivum

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Plant Name:  Sempervivum species
Common name:  Hens & Chicks
Plant Type:  Succulent
Plant Height:  2” – 6”
Plant Width:  6” – 10”
Bloom Time: June – August
Flower Color: Pink
Exposure: Full to Part Sun
Soil Requirements: Well-Drained Sandy or Gravelly Soil.
Water Need:  Low
Fire Resistant: YES; Grow 10’+ from house.
Attributes: Wide Variety of Foliage Colors; Deer Resistant; Year Round Interest
Uses:  Rock Walls; Rock Gardens; Succulent Gardens; Edging
Note:  Parent Plant Produces Flowers & Smaller Plants (or chicks); Plant Dies After Flowering Thus Offsets; >
Native to: Southern Europe/Western Asia
Oregon Native:  NO
USDA Hardiness Zone: 4 – 10

Report by: Viki Ashford, AGC Member

Photos by: Carlotta Lucas, AGC Member

Clemson Variegated Silverberry

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Plant Name:  Elaeagnus pungens ‘Clemson Variegated’
Common name:  ‘Clemson Variegated’ Silverberry; Thorny Olive; Silver Thorn
Plant Type:  Evergreen Shrub
Plant Height:  6’ – 10’
Plant Width:  6’ – 10’
Bloom Time:  October – November
Flower Color:  White Flowers followed by Red Fruit
Exposure: Full Sun to Part Shade
Soil Requirements: Tolerates Wide Range of Soils with Good Drainage.
Water Need:  Regular
Firewise: Medium Flammability
Attributes: Deer Resistant; Fragrant, Showy Flowers; Attracts Songbirds & Bees; Drought Resistant; Winter Interest; Variegated Leaves of Green, Gold, Yellow
Uses:  Background Plant; Wind Break; Screen.
Note:  Thorns
Native to:  China & Japan
Oregon Native:  NO
USDA Hardiness Zone:  7 – 11

Report by: Viki Ashford, AGC Member & Master Gardener

Photo from: Oregon State University Dept. of Horticulture https://landscapeplants.oregonstate.edu/node/2132

Posted by: Carlotta Lucas

Horticulture Report: Douglas Spirea

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Plant Name:  Spiraea douglasii
Common name:  Douglas or Western Spirea
Plant Type:  Deciduous Shrub
Plant Height:  3’ – 7’
Plant Width:  3’ – 6’
Bloom Time:  June to August
Flower Color:  Deep Pink
Exposure:Full Sun to Part Shade
Soil Requirements:  Well drained, acidic, loamy, sandy soil.
Water Need:  Does well in wet areas;
Attributes: Retains brown seed heads; Attracts Bees, Butterflies, Hummingbirds, Other Pollinators; Deer Resistant.
Note:  Needs consistent moisture; Remove suckers; Susceptible to Fire Blight, Leaf Spot, Powdery Mildew, Aphids, Scale.  Prune after Flowering.
Uses: Hedge; Rain Garden; Cottage Gardens; Borders; Slopes.
Native to:  Oregon to Alaska
Oregon Native:  YES
USDA Hardiness Zone: 5 – 8

Report by: Viki Ashford, AGC Member

Photo by: Carlotta Lucas, AGC Member                                                                  Photo Location: Hyatt Lake, Oregon – July 25, 2020

Horticulture Report: Christmas Fern

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Plant Name:  Polystichum acrostichoides Common name: Christmas Fern Plant Type: Evergreen Fern Plant Height: 1’ – 2’ Spread: 1’ – 2’ Bloom Time: N/A Flower Color:  N/A Exposure:  Part Shade to Full Shade Soil Requirements:  Organically Rich, Well-Drained; does not tolerate clay soil. Water Needs: Dry to Medium Attributes:  Winter Interest; Deer Resistant; Young fiddleheads are silvery & scaled in spring. Note: Plant Rhizomes at angle to avoid crown rot. Uses: Borders; Ground Cover, but plant next to each other as does not spread; massing on slopes to control erosion. Native to: Eastern North America Oregon Native:  NO USDA Hardiness Zone:  3 – 9 Report by: Viki Ashford, AGC member & Master Gardener Photo credit: Wiki Commons https://commons.wikimedia.org/wiki/File:Christmas_Fern_(6928030406).jpg Author: Virginia State Parks staff / CC BY (https://creativecommons.org/licenses/by/2.0)