Broombush
Hypericum prolificum
Last reviewed: September 2026
Hypericum prolificum, or shrubby St. Johnswort, is a rounded deciduous shrub with bright yellow flowers from June through August. It grows well in full sun to part shade and tolerates medium to dry soils.
Toxicity unknown
Broombush (Hypericum prolificum) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
The USDA PLANTS Database (opens in new tab) does not flag Broombush as toxic to livestock.
Light
full sun
Water
medium
Size
36"–72" H × 36"–60" W
Bloom
Jun, Jul, Aug
Native to
AL, AR, CT, DE and 29 more states
Pollinators
bees, butterflies
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 452 programs across 44 states, each with a link to the provider and the date we last checked it.
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Broombush is a compact native shrub that produces clusters of bright yellow flowers from June through August. It forms a dense, rounded habit and is drought tolerant once established, making it a reliable choice for sunny locations.
Growing Broombush
Grow Broombush in full sun and medium water. Mature plants reach 36 to 72 inches tall and spread 36 to 60 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Broombush is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
- Winter appearance can look sparse without leaves
Wildlife value
The abundant yellow flowers attract bees and butterflies throughout the summer months. The dense branching structure also provides nesting sites for small birds.
Common questions
- When does Hypericum prolificum bloom?
- Hypericum prolificum flowers from June through August, producing clusters of small, bright yellow blooms.
- What pollinators visit Hypericum prolificum?
- Bees and butterflies are the most common visitors to the yellow flowers of Hypericum prolificum, drawn to the abundant pollen.
- How much light and water does Hypericum prolificum need?
- This shrub performs best in full sun but tolerates part shade, and it does well in medium moisture soils while withstanding drier conditions once established.
- What growth habit does Hypericum prolificum have?
- Hypericum prolificum is a dense, rounded, deciduous shrub that typically reaches three to five feet tall, often used in hedgerows, borders, and pollinator gardens.
- Is Broombush toxic to livestock?
- The USDA PLANTS Database does not flag Broombush as toxic to livestock.
- Is Broombush HOA-friendly?
- Broombush is generally an HOA-friendly choice in the right placement, with low maintenance.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow Broombush? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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