common juniper
Juniperus communis
A genus split is not a placement verdict.
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Common juniper is not a fire-resistant choice near a structure, despite one source treating it as less flammable.
Four of five sources that make a recommendation argue against it. The USDA Forest Service and state Firewise programs place it at 4, “Not Firewise,” the lowest end of their four-step scale. Ohio State’s extension service rates it very highly flammable as an evergreen shrub, the top of its five-band scale. The University of Wyoming’s extension service names common juniper as fire-prone, while Girona’s provincial government and Catalonia’s fire service call it very discouraged under a method combining fire research, fuel structure, maintenance, and fire-service experience.
The Barcelona provincial government and CREAF reach the opposite practical judgment, telling managers to preserve common juniper first among less-flammable species when opening and maintaining perimeter protection strips. That advice is tied to managing a strip, while the Girona guidance judges garden suitability through a broader mix of concerns. The two Catalan conclusions therefore answer different management questions, but they still leave a real conflict over this species.
A laboratory observation adds context without settling the dispute: live, unpredried twigs sampled in February took 27.5 seconds to flame under an epiradiator. The database sets no single threshold that turns that figure into a recommendation. Given the four warnings and the overall highly flammable classification, common juniper is best kept away from structures rather than treated as a resistant shrub.
- Form
- shrub
- Mature height
- ~12 ft
- Light
- Full sun
- Water need
- low
- Rated in
- Catalonia, Spain; Global; Ohio / Midwest; Wyoming +1
