• Photo of Hypericum kalmianum (Hypericum kalmianums)

Plant Profile: Hypericum kalmianum

Taxonomy: Hypericum kalmianum

Names

Kalm's St. John's Wort, Saint Johnswort

  • Photo of Hypericum kalmianum (Hypericum kalmianums)

Phonetic Spelling:hy-PER-ih-kum kal-mee-AH-num

Genus:Hypericum

Species:kalmianum

Family:Hypericaceae

Drought-resistant and characterized by a more open and airy growth habit compared to other hypericum varieties, this is one of the most cold-tolerant species available. It thrives in various soil types and can withstand dry conditions.

**Identification Tips:**
This plant can be a deciduous or evergreen shrub, a small tree, or an herb. The genus Hypericum encompasses approximately 400 species, which range from herbs to shrubs and trees, each with unique flowering periods and care needs.

Hypericum kalmianum Feature Summary

Hypericum kalmianum Image Gallery

Tags

#deciduous
#drought tolerant
#yellow flowers
#blue-green leaves
#cold tolerant
#fantz
#compact habit

Similar Plants

Hypericum kalmianum Feature Summary

Fruit
A (2)3-5 celled capsule, sometimes fleshy.
Flowers
Solitary or cymose, terminal or axillary. Yellow (usually) 5-petaled (rarely 4), 5 sepals (rarely 4); stamens numerous, in bundles or in showy boss.
Gold/Yellow
1-3 inches
Leaves
Opposite or whorled, decussate, simple, entire; sessile or petiole short.
Green
Blue
Opposite
Whorled
1-3 inches
< 1 inch
Stem
Contain 2 to 4(up to 6) ridges on newer growth, smooth and rounded on older growth.
Attributes
Whole Plant Traits
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Hypericum kalmianum Fruit

Hypericum kalmianum: Fruit Description

A (2)3-5 celled capsule, sometimes fleshy.

Hypericum kalmianum: Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Hypericum kalmianum Flowers

Hypericum kalmianum: Flower Description

Solitary or cymose, terminal or axillary. Yellow (usually) 5-petaled (rarely 4), 5 sepals (rarely 4); stamens numerous, in bundles or in showy boss.

Hypericum kalmianum: Flower Color

filter_vintage
Gold/Yellow

Hypericum kalmianum: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Hypericum kalmianum: Flower Bloom Time

Winter
Spring
Summer
Fall

Hypericum kalmianum: Flower Size

1-3 inches
3-6 inches
< 1 inch
> 6 inches

Hypericum kalmianum Leaves

Hypericum kalmianum: Leaf Description

Opposite or whorled, decussate, simple, entire; sessile or petiole short.

Hypericum kalmianum: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Hypericum kalmianum: Leaf Color

spa
Blue
spa
Green

Hypericum kalmianum: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Hypericum kalmianum: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Hypericum kalmianum: Leaf Margin

Crenate
Crenulate
Dentate
Denticulate
Doubly Crenate
Doubly Dentate
Doubly Serrate
Entire
Lobed
Serrate
Sinuate
Undulate

Hypericum kalmianum: Hairs Present

No
Yes

Hypericum kalmianum: Leaf Length

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Hypericum kalmianum: Leaf Width

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Hypericum kalmianum Stem

Hypericum kalmianum: Stem Description

Contain 2 to 4(up to 6) ridges on newer growth, smooth and rounded on older growth.

Hypericum kalmianum: Stem Color

grass
Green

Hypericum kalmianum: Stem Is Aromatic

No
Yes

Hypericum kalmianum Attributes

Hypericum kalmianum: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Hypericum kalmianum Whole Plant Traits

Hypericum kalmianum: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Hypericum kalmianum: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Hypericum kalmianum: Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Hypericum kalmianum: Texture

Fine
Medium
Coarse

Hypericum kalmianum Cultural Conditions

Hypericum kalmianum: Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Hypericum kalmianum: USDA Plant Hardiness Zone

thermostat
4a
thermostat
4b
thermostat
5a
thermostat
5b
thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b