Fourpetal St. John’s Wort (Hypericum tetrapetalum)

Educational Story

The Fourpetal St. John’s Wort, Hypericum tetrapetalum, is a small woody shrub with few branches that can be found growing in pine flatwoods throughout Florida. It occurs only in Florida and limited areas of Georgia.  This species can be identified by its brilliant yellow flowers, with four petals and heart shaped leaf bases that clasp around the stem. It enjoys full sun to part shade, in damp sandy soils of mesic flatwoods.

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Gardening Facts

Scientific Name: Hypericum tetrapetalum
Common Name: Four-petal St. Johnwort
Description of facts and concepts: Open branched species with small stems, with leaves that “clasp” around the stems. Leaves are blue/ green and the plant grows an irregular form.
Seed or division information: Small black seeds form after the flower, about 0.5 mm.
Date of flower’s bloom (Month and week): All year
Ecoregion: Damp, sandy soils
Color of Flower: Yellow
Height: Up to 3 feet
Spread: 1-2 feet
Family: Hypericaceae (St. John’s-wort or garcinia)
Soil Type: Base to Acidic Acidic to neutral
Soil: Dry to Wet Moist
Light: Sun to Shade Full sun to part shade
Zone: 8B-10B