Prune juniper by thinning green wood. New needles will not sprout from the bare interior.
Cut only where green needles remain
| Factor | Recommended | Avoid |
|---|---|---|
| When | Late winter or early spring, before the flush | Late summer cuts that push soft growth into fall |
| Where | Stems that still have green needles or visible buds | The leafless brown interior (the dead zone) |
| How | Thin at a V to a side branch that is still green | Hedge shears that carve a hole in old wood |
| How much | Light; replace the plant if it has outgrown the spot | Cutting back to large leafless limbs |
Junipers shade out their own interiors. That brown core is not a place new buds will fill. If you cut into it, the hole stays. [1] [2] Late summer cuts push soft growth that winter can burn. Shape in late winter or early spring instead.
When should I prune juniper?
Late winter or early spring, before new growth starts. Remove dead or broken wood any time.
Will juniper grow back from bare wood?
No. New growth will not sprout from branches left with no needles. Cut only where foliage remains, or replace the plant.
How to prune juniper
Thin. Do not give it a boxwood haircut.
- Wait until late winter or early spring, before the strong flush.
- Find the last green needles on the stem you want to shorten. Do not go behind that into brown wood.
- Cut at a V-shaped fork, back to a side branch that still has foliage. [3]
- On a creeping mat, lift the pad and pull out dead interior twigs so air can move. Do not scalp the surface into old stems.
- Stop. If the plant already fills the bed, replace it rather than topping into the core. [4]
Creeping mats vs upright trees
On a spreading shrub such as Sea Green, favor the more horizontal side of a V if you want width, and the more vertical side if you need to hold it in. On an upright column such as Spartan, leave the leader and thin side shoots; do not shear the teardrop into a brown wall.
Can I shear juniper like a hedge?
Shearing packs the outer needles and enlarges the bare core. Light tip work on still-green growth can hold a formal outline. Do not carve into brown wood.
If you can see brown wood at the cut, you went too far — stop and leave the remaining green.
FAQ
What if I already cut a hole in old wood?
That gap will not leaf out. Nearby green growth may hide it over years. A large wound is a reason to replace the plant.
Can I prune in summer?
Dead or broken wood can come off any time. Shape cuts belong in late winter or early spring, not late summer.
Related guides
Recommended plants
References
- [1] The Morton Arboretum -
https://mortonarb.org/plant-and-protect/tree-plant-care/plant-care-resources/how-to-prune-evergreen-trees-and-shrubs/ - [2] UMass Extension -
https://www.umass.edu/agriculture-food-environment/landscape/fact-sheets/juniper-culture - [3] University of Georgia Extension -
https://fieldreport.caes.uga.edu/publications/C956/junipers/ - [4] Clemson HGIC -
https://hgic.clemson.edu/factsheet/juniper/
This note is part of Juniperus Guides.
More pruning timing notes by plant live in Pruning Guides.
Updated: Reviewed by Bosquelle Editors