Hypericum calycinum
Creeping St. John's Wort

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:

Stoloniferous 4

Hardiness:

USDA Zone 5 253

Deciduous / Evergreen:

Evergreen 262

Flower Notes:

Yellow (Interesting, bright yellow 3" flowers with a dome of stamens on new growth in the summer)

Foliage Notes:

Green (Dark blue-green leaves, glaucous beneath; no appreciable fall color)

Fruit Notes:

Brown (Not ornamentally important)

Ultimate Height:

18 feet

Ultimate Spread:

24 feet

Fruiting Times:

Light Requirements:

Soil Notes:

Widely adapted to soils; best in well-drained soil

Range:

Southeastern Europe, Turkey

Diagnostic Characteristics:

Opposite, simple, ovate, sessile leaves (2-4" long by 0.5-1.75" wide) arranged with a decussate phyllotaxy (where leaf pairs, in an opposite arrangement, grow perpindicular to the previous pair). The showy flowers, borne in small cymes, are 2- 3" across with 5 petals and a large dome of numerous long stamens. Stems are 4-angled.

Purdue Plant Doctor

Parts and Problems of St. John's Wort

Special Characteristics:

Additional Information

Relatively trouble-free. Tolerates dry conditions well (even drier shade). Generally, tops are killed back in severe winters near its limit of hardiness. Mowing to the ground each spring improves aesthetics of the following regrowth. Slow to leaf out in spring. Can be invasive via spreading stolons. Poisonous to animals.

Plant Photo Gallery

Groundcover Habit

Leaves

Flower Bud

Flower

Fruit

Stems

Winter Foliage

Winter Habit

When Hypericum calycinum has been observed flowering or fruiting at Purdue University

Flowering

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Fruiting

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7 Hypericum calycinum found

Building Map...

= Heritage plant = Memorial plant

Number	Accession ID	Location
1	2009_15650*A	DAUC
2	2009_15631*A	LYNN
3	2014_00142*A	DAUC
4	2014_00142*B	DAUC
5	2009_15632*A	LYNN
6	2023_00775*A	HORT
7	2023_00775*B	HORT

Other plants like this Hypericum calycinum (Creeping St. John's Wort)

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