Hypericum kalmianum 'Gemo'
Gemo Kalm St. John's Wort

Hypericum kalmianum ′Gemo′ - Flowering Habit

Family:

Hypericaceae (St. John's Wort Family) 6

Genus:

Hypericum (St. John's Wort St. Johnswort Aaron's Beard Wort, St. John's) 6

Plant Type:

Shrub 468

Growth Forms:

Bushy 187

Hardiness:

USDA Zone 4 520

Deciduous / Evergreen:

Deciduous 839

Flower Notes:

Yellow (Unique and attractive bright golden yellow petals with a large dome of similar-colored stamens)

Foliage Notes:

Green (Glossy blue-green summer foliage)

Fruit Notes:

Brown (4-5 celled beaked capsule; moderately interesting; can persist into spring)

Ultimate Height:

2-3 feet

Ultimate Spread:

2-3 feet

Light Requirements:

Soil Notes:

Adaptable, but must be well-drained

Range:

Cultivated origin

Diagnostic Characteristics:

Leaves (1-2" long) are opposite, simple, narrow, linear to lanceolate and dotted with resin glands. Stems are 4-angled. The showy flowers, borne in small cymes, have 5 petals, 5 styles, and a large dome of numerous long stamens.

Special Characteristics:

Flowering Characteristics 287

Pest and/or Disease Resistant 96

Additional Information

Hypericum kalmianum 'Gemo' is a compact, mounded deciduous shrub that produces a profusion of small, interesting, bright yellow flowers beginning late spring and continuing all the way into fall.