Today in the Garden: Hostas

Long-lived perennials for shade and semi-shaded areas. Hostas come in a wide variety of sizes & textures. They are available as tiny plants only 8-inches tall to large plants as big a 4 feet clumps with 2 foot leaves. USDA Zones 3-9

Photo from Carlotta Lucas’ garden 5/7/21.

Horticulture Report: Diabolo® Ninebark

Plant Name:  Physocarpus opulifolius ‘Diabolo®’
Common name: Ninebark ‘Diabolo®’
Plant Type: Deciduous Shrub
Plant Height: 4’ – 8’
Spread: 4’ – 8’
Bloom Time: May – June
Flower Color:  Pinkish White with Purple Leaves and Reddish Fruit.
Exposure:  Full Sun to Part Shade
Soil Requirements:  Tolerates many soil types.
Water Needs: Dry to Medium
Attributes:  Drought Tolerant; Bird Friendly
Note:  Prune immediately after bloom.
Uses: Hedge; Exfoliating Bark provides Winter Interest; Shrub Border.
Native to: North America
Oregon Native:  NO
USDA Hardiness Zone:  2 – 7

Report by: Viki Ashford, AGC Member & Master Gardener

Photo from: Monrovia  https://www.monrovia.com/plant-catalog/plants/1926/diabolo-ninebark/

Pieris Japonica

This is a Pieris Japonica I bought at the Jackson County Master Garden Fair in a one gallon container about 7 or 8 years ago. The new growth is always this stunning pink color. At first, when I saw it I thought it was a cross between a Pieris and an Azalea. ~ Jeanne Arago, AGC Member

Pieris Japonica

Horticulture Report: 
 
Plant Name: Pieris Japonica, Japanese Andromeda, Japanese Pieris 
Type: Broadleaf evergreen
Height: 4 -8 feet
Spread: 3 to 6 feet
Bloom Time: April
Bloom Color: White
Exposure: Full sun (in northern climates)  Part to Full Shade (elsewhere)
Water: Medium
Attributes: Showy Flowers, Colorful Foliage, Evergreen, Winter Interest
Tolerates: Deer, Heavy Shade
USDA Zone: 5 to 8
 
Best grown in organically rich, slightly acidic, medium moisture, well-drained soil in full sun (see above) to part or full shade. Weakened plants due to hot summer stress may cause to to succumb to a harsh winter. It grows best in locations sheltered from wind with some afternoon shade. Remove spent flowers immediately after bloom.

Horticulture Report: Helichrysum petiolare

Plant Name:  Helichrysum petiolarelicorice-plant1.jpg
Common name:  Licorice plant
Plant type: Annual
(Tender Perennial Zones 9-11)

Height: 6-9 inches
Spread: 1-3 ft
Bloom: White, but Insignificant
Exposure: Full Sun – Part Shade
Soil Requirements:  Average
Water Needs: Dry to medium
Attributes:   Dense trailing silvery leaves, Tolerates poor soil & drought
Notes: Good drainage is a must!
Uses:  Annual, Hanging Baskets, Containers, Rock walls, Annual ground-cover
Native to: Southern Africa
USDA Hardiness Zone: 9-11

Horticulture Report: Cotoneaster salicifolius

Plant Name:  Cotoneaster salicifolius


Common name:  Willow-leaf cotoneaster
Plant type: Broadleaf  Evergreen shrub
Height:  6-8 ft
Width:   6-10 ft
Bloom Time:  May
Flower Color:  Small White
Exposure: Full Sun to Part Shade
Soil Requirements: Well-drained Sandy Loam
Water Needs: Average, tolerates drought       
Attributes:  Non-edible Showy Red Berries in Winter, Arching Habit with open branches, Bird-friendly. 
Uses:  Border, Specimen, Background plant, Bank Cover, Group/Mass Plantings, Hedge, Year-round Interest.
Note: In hot areas part sun is best.
Native to: Western China & Northern India  
USDA Hardiness Zone: 6-8

Low-growing varieties:

Cotoneaster salicifolius ‘Repens’:  Low-growing form. Can use as a groundcover. Covered in red pomes fruits in the fall.  Semi-evergreen in severe winter areas. ‘Green Carpet’ is very similar in habit.

Cotoneaster salicifolius ‘Scarlet Leader’ – Prostrate form creates a mat-like low ground cover only 2-3′ tall but spreads 8- 10′. Foliage is glossy & disease-free. Leaves can have purple hue in winter.  Produces abundant scarlet berries in the winter.

Drumstick Allium

Plant Name:  Allium sphaerocephalonAllium_Drumstick
Common name:  Persian Onion or Drumstick Allium
Plant type:  Bulb
Height:  20-24 inches
Bloom Time:  May-June
Flower Color:  Reddish-Purple
Exposure:  Full Sun- Part Sun
Soil Requirements: Well-drained fertile sandy soil
Water Needs:  Average
Attributes:   Colorful Fragrant Flowers, Interesting egg-shaped flower,  Attracts Pollinators, Easy to grow, Deer resistant , Squirrel & Rabbit resistant.
Uses:  Cut flower, Dried Flower,  Perennial Garden, Mass plantings, Garden Interest
USDA Hardiness Zone:  5-8