Alphabetical Plant Listing

Hypericum kalmianum Sunny Boulevard® (Kalm St. John's Wort)

Kalm St. John's Wort Sunny Boulevard®, Hypericum x 'Deppe' PP20045, CBR#3587


Free-flowering, Hypericum kalmianum Sunny Boulevard® (Kalm St. John's Wort) (Kalm St. John's Wort) is a compact, tightly branched, rounded shrub with showy, rich yellow flowers from mid to late summer. While small, they are produced in such quantities that they literally cover the plant. Each cup-shaped flower presents 5 petals surrounding a prominent tuft of golden stamens. Rich in nectar, they are a favorite of butterflies, bumblebees, or other pollinators. The foliage of willow-like dark green leaves provides a lovely backdrop for the bright golden blossoms. This deer-resistant little shrub is perfect for adding bright summer color to the garden.

  • Grows up to 2-3 ft. tall and wide (60-90 cm)
  • A full sun to part shade lover, this plant is easily grown in medium moisture, well-drained soils. Prefers moist, rich, sandy loams but tolerates poor, rocky or wet soils. Drought and salt tolerant.
  • Low maintenance, this plant is also generally pest and disease free. Deer resistant.
  • Perfect as a specimen or massed in borders, rock gardens, slopes, naturalized areas. Makes a pretty hedge.
  • Prune as needed to shape after flowering.

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Requirements

Hardiness 4 – 8
Climate Zones 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 10
Plant Type Shrubs
Plant Family Hypericum - St John's Wort
Exposure Full Sun, Partial Sun
Season of Interest Summer (Mid,Late)
Height 2' – 3' (60cm – 90cm)
Spread 2' – 3' (60cm – 90cm)
Spacing 24" – 48" (60cm – 120cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Showy
Tolerance Deer, Drought, Dry Soil, Salt
Attracts Birds, Butterflies
Garden Uses Banks and Slopes, Beds and Borders, Hedges and Screens
Garden Styles Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow

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Photo Credit - Courtesy of Proven Winners - www.provenwinners.com

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 4 – 8
Climate Zones 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 10
Plant Type Shrubs
Plant Family Hypericum - St John's Wort
Exposure Full Sun, Partial Sun
Season of Interest Summer (Mid,Late)
Height 2' – 3' (60cm – 90cm)
Spread 2' – 3' (60cm – 90cm)
Spacing 24" – 48" (60cm – 120cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Showy
Tolerance Deer, Drought, Dry Soil, Salt
Attracts Birds, Butterflies
Garden Uses Banks and Slopes, Beds and Borders, Hedges and Screens
Garden Styles Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow

Great Plant Combination Ideas with Hypericum - St John's Wort

Guides with Hypericum - St John's Wort

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