Shrubby St. John’s wort is a low to medium-sized native shrub reaching 3 to 4 feet high. The bright yellow flowers with a profusion of yellow stamens look like fireworks. The exfoliating bark and attractive seed capsules add winter interest to the landscape.
This species is native to the Chicago Region according to Swink and Wilhelm’s Plants of the Chicago Region, with updates made according to current research.
- Family (English) Hypericum
- Family (botanic) Hypericaceae
- Tree or plant type Shrub
- Native locale Chicago area, Illinois, North America
- Size range Small shrub (3-5 feet)
- Light exposure Full sun (6 hrs direct light daily), Partial sun / shade (4-6 hrs light daily)
- Hardiness zones Zone 4, Zone 5 (Chicago), Zone 6, Zone 7, Zone 8
- Soil preference Moist, well-drained soil
- Tolerances Alkaline soil, Clay soil, Dry sites, Occasional flooding
- Season of interest early summer, late summer, midsummer
- Flower color and fragrance Yellow
- Shape or form Mounded, Multi-stemmed, Round
- Growth rate Slow