Do not plant. Listed invasive in Kentucky.
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Ecological relationships
Who uses this plant?
22CaterpillarsGenus host records with ranges including KY
Genus host records with ranges including KY · Hypericum
- Acleris maculidorsanaStained-Back Leafroller Moth
- Choristoneura rosaceanaOblique-Banded Leafroller Moth, Rosaceous Leaf Roller
- Eupithecia miserulataCommon Eupithacia, Common Pug
- Hyppa xylinoidesCommon Hyppa
- Iodopepla u-albumBurgundy St. Johnswort Moth, White-Eyed Borer
- Iridopsis ephyrariaPale-Winged Gray
- Melanchra assimilisBlack Arches
- Mocis latipesSmall Mocis, Striped Grass Looper
- Nedra ramosulaGray Half-Spot
- Nemoria bistriariaTwo-Striped Emerald, Red-Fringed Emerald
Show all 22
- Nemoria tuscaroraAppalachian Emerald
- Phlogophora irisOlive Angle Shades
- Platynota flavedanaBlack-Shaded Platynota
- Probole amicariaFriendly Probole
- Sparganothis sulfureanaSparganothis Fruitworm Moth, Sulfur Leafroller, False Yellow-Head
- Synchlora aerataWavy-Lined Emerald, Camouflaged Looper
- Tallula watsoniWatson's Tallula
- Xestia c-nigrumSpotted Cut-Worm, Setaceous Hebrew Character, Lesser Black-letter Dart
- Zale lunataLunate Zale
- Caloptilia hypericella
- Coleotechnites nigritus
- Xenotemna pallorana
—BeesSoutheastern regional records
—Specialist beesPollen specialists
1BirdsRecorded genus food-resource interactions; not a state feeding claim
Recorded genus food-resource interactions; not a state feeding claim · Hypericum
- Aythya collarisRing-necked Duck
Growing and identification
Plant details
- Family
- Hypericaceae
- Hardiness
- Zones 3a–8b
- Soil pH
- Acidic to alkaline
- Flower color
- Yellow
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Flower color · “Yellow” · NC Extension Plant Toolbox
- Hardiness · “Zones 3a–8b” · NC Extension Plant Toolbox
- Height · “1–3 feet” · NC Extension Plant Toolbox
- Leaves · “Deciduous” · NC Extension Plant Toolbox
- Life cycle · “Perennial” · NC Extension Plant Toolbox
- Light · “Full sun (6 or more hours of direct sunlight a day); Partial shade (direct sunlight only part of the day, 2-6 hours)” · NC Extension Plant Toolbox
- Soil · “Moist” · NC Extension Plant Toolbox
- Soil pH · “Acidic to alkaline” · NC Extension Plant Toolbox
- Spread · “9 inches–2 feet” · NC Extension Plant Toolbox
Also known as
Common St. John's wort; Common St. Johnswort; European St. Johnswort
Conservation status
| Kentucky rank | Not available |
|---|---|
| Global rank | GNR |
| KY status | Not verified |
| Federal status | Not verified |
Sources
- tnky_atlas
- usda
- ky_invasive
- Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
- Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
- Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
- Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)
- Narango, Tallamy & Shropshire 2020, Few keystone plant genera support the majority of Lepidoptera species, Nature Communications