Category Archives: Horticulture Reports

Horticulture Report: Rock Rose

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Plant Name:  Helianthemum nummularium

Common name:  Sun Rose or Rock Rose

Plant Type: Herbaceous Perennial

Plant Height:  8” – 10”

Plant Width:  12” – 16”

Bloom Time:  June – August

Flower Color:  Red, Pink, Yellow, Orange, Multicolored

Exposure: Full Sun

Soil Requirements: Dry, Alkaline, Rocky, Sandy Soil;

Water Needs: Dry; Low

Fire Resistant:  YES – Zone 1:    Plant 30+ feet from Structure

Attributes: Mounding Growth Habit; Drought Tolerant; Evergreen with Grey-Green Foliage; Attracts Bees/Butterflies.

Uses:  Rock Gardens; Edging Plant; Ground cover; Border Front.

Note: Shear Plants after flowering to encourage additional growth; each flower opens for only one day.

Native to: Europe; Asia Minor

Oregon Native:   NO

USDA Hardiness Zone: 4 – 7

Horticulture Report: Armeria maritima (Sea Thrift)

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Plant Name:  Armeria maritima

Common name:  Sea Thrift
Plant Type:  Herbaceous Perennial
Plant Height:  .5’ – 1’
Plant Width:  .5’ – 1’
Bloom Time: April – May
Flower Color:  Pink to White
Exposure: Full Sun
Soil Requirements: Infertile, Well-Drained Soil.
Water Needs: Low
Fire Resistant:  YES; Zone 8 = Plant 30’+ from house.
Attributes: Showy Flowers; Drought Tolerant; Deer Tolerant; Attracts Bees; Butterflies.
Uses: Ground Cover; Edging/Border Fronts; Rock Gardens; Containers.
Note:  Deadhead to Encourage More Blooms.
Native to: Northern Hemisphere
Oregon Native: YES
USDA Hardiness Zone: 4 – 8

Report by: Viki Ashford, AGC Board Member

Photo by: Carlotta Lucas, AGC Board Member

Horticulture Report: Columbine

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 Plant Name:  Aquilegia species

Common name:  Columbine

Plant Type:  Perennial

Plant Height:  10” – 36”

Plant Width:  10” – 12”

Bloom Time: May – July

Flower Color: Multicolor

Exposure: Full Sun to Partial Shade

Soil Requirements: Clay, Loam, Sand

Water Needs:  Average

Fire Resistant: YES; Zone 8 = Plant 30’+ from house. 

Attributes: Good Cut Flower; Showy; Deer Resistant; Attracts Bees, Butterflies, Hummingbirds; Many Colorful Hybrid Varieties.

Uses: Borders; Containers; Rock Gardens; Cottage Gardens; Native Gardens.

Note:  Remove spent flowers to prolong blooming; Self-seeds Prolifically; Prone to Powdery Mildew & Leaf Miners.

Native to: Northern Hemisphere

Oregon Native:  YES

 USDA Hardiness Zone: 3 – 9

Columbines

Report by: Viki Ashford, AGC Board Member

Photos by: Carlotta Lucas, AGC Board Member

Horticulture Report: Chives

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Plant Name:  Allium schoenoprasum

Common name:  Chives

Plant Type:  Perennial Bulb

Plant Height:  1’ – 1.5’

Plant Width:  1’ – 1.5’

Bloom Time: June – August

Flower Color: Pale Purple

Exposure: Full Sun to Part Shade.

Soil Requirements: Average, Medium, Well-Drained.

Water Needs:  Medium

Fire Resistant: YES – Zone 1 – Plant 10’+ from house.

Attributes:  Showy Flower with Fragrant Leaves; Deer/Drought Tolerant; Attracts Butterflies, Bees, Pollinators; Consistent performer

Uses: Herb; Herb/Vegetable Gardens; Rock Gardens; Containers.

Note:  Self seeds unless spent flowers are deadheaded; Harvest Leaves by clipping at base of plant; Root Rot may occur in poorly drained soil. 

Native to: Temperate Northern Hemisphere

Oregon Native:   YES

 USDA Hardiness Zone: 4 – 8

Chives

Report by: Viki Ashford, AGC Board Member

Photo by: Carlotta Lucas, AGC Board Member