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Sale New Hypericum kalmianum Cobalt-n-Gold™ (Kalm St. Johnswort)

Hypericum kalmianum Cobalt-n-Gold™ (Kalm St. Johnswort)

$29.00 $0.00
Next available Monday or Tuesday

Unavailable Available Only few left Out of Stock Pre-order
Shrub

Colbalt-n-Gold Kalm St. Johnswort is a small, cheerful, decorative shrub.

The small flowers cover the shrub in June and look good on top of the gray-green leaves.

Everything about this plant is cute - the small stature, the button-like flowers (albeit the showy yellow stamens would make them spiky awkward buttons), and the petite leaves.

Colbalt-n-Gold likes to spread wider than it grows high and we like to plant groups (in groups of odd numbers) or tuck in empty spaces one-at-a-time. It looks proper at the base of taller, leggier shrubs and it look like it belongs mixed in with perennials. It's like one of those kids who can talk to anybody in the class or a person of any age - they're not pigeonholed in one social group - a quality I admire.

  • small native shrub for sunny, dryish locations
  • bright yellow flowers, yes, that's nice for 2-3 weeks, but the gray-green foliage looks great throughout the growing season
  • that leaf color, plus the small leaf texture, contrast in a border or foundation planting where so many other plants have broad, green leaves
heat tolerant, cold tolerant, pollinator plant
Common Name
Kalm St. Johnswort, Kalm's St. Johnswort, St. Johnswort, St. John's wort
Other Names
n/a
USDA Hardiness Zones
4a-8a
Size
small
Class
flowering shrub, deciduous
Shape
round
Height
2-3'
Width
4-5'
Growth Rate
average
Flower Color
yellow
Showy Flower?
yes
Flower Season
summer
Leaf Colors
  • Spring: blue-green
  • Summer: blue-green
  • Fall: yellow, orange, red
Fall Leaf Color Quality
good
Ornamental Bark?
yes
Bark Feature
exfoliating
Native to USA?
yes
Native To
upper Midwest
Soil Moisture Requirements
average garden, well-drained, no standing water
Soil pH Requirements
acid, neutral, alkaline
Light Requirements
full sun, part shade
To Make It Thrive
Give Kalm St. Johnswort well-drained soils. In the wild it grows in rocky soils so that tells you something about needing drainage. Best flowering in full sun.
Plant Patent
'PIIHYP-I' PP25,318
Is this the medicinal St. Johnswort?
No, this isn't the medicinal species, that's Hypericum perforatum and is an herbaceous perennial, while Kalm St. Johnswort is a woody shrub.

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