Blue Holly Holly
Blue Princess
Evergreen · Female · Red berries · Zones 5-8
Blue Holly Holly
Blue Girl
Hardy blue-green female holly for northern gardens.
An evergreen member of the blue & meserve holly group, Blue Girl earns its place through bright red berries and a tough, long-lived constitution. Below is a full profile of Blue Girl — its characteristics, how to grow it, whether it needs a pollinator for berries, and answers to the questions gardeners ask most.
About Blue Girl
Grouped among the blue & meserve holly, Blue Girl shows the hallmarks of the class — lustrous blue-green leaves on distinctive purple stems. Ilex × meserveae, bred by Kathleen Meserve, brought glossy foliage and heavy red berries to northern gardens where English holly fails.
Blue Girl is evergreen and hardy across USDA zones 5-8, so it suits a wide range of gardens with the right acidic, well-drained soil and seasonal care.
Characteristics and form
Blue Girl makes a dense, rounded to pyramidal evergreen shrub, typically around 6-10 ft tall and 6 to 10 feet wide. Its foliage is lustrous blue-green leaves on distinctive purple stems. Knowing a holly's mature size and habit is the key to placing it well: give Blue Girl room to reach its full spread without crowding, which also keeps air moving through the plant and disease at bay.
Berries and pollination
Blue Girl is a female holly, so it carries the red berries — but only when a compatible male holly flowers within about fifty feet. Bees move the pollen; without a male in range, a female holly still flowers but sets little or no fruit.
Remember: holly is dioecious — male and female flowers grow on separate plants, and only pollinated females bear fruit. See our full guide to holly berries and pollination for how to guarantee a berry crop.
How to grow Blue Girl
Plant Blue Girl where it will get full sun to part shade in acidic, moist, well-drained soil. Full sun gives the densest growth and the heaviest berry set. Set the plant at the depth it grew in the pot, water it deeply while it establishes, and mulch the root zone to hold moisture and keep the soil cool and acidic.
- Light: Full sun to part shade; full sun gives the densest growth and the most berries.
- Soil: Acidic, moist, and well-drained, ideally pH 5.0–6.5. Improve heavy or alkaline ground with organic matter and keep it mulched.
- Water: Deep, regular watering while establishing; steady summer moisture helps hold the berry crop.
- Feeding: An acid-forming holly fertilizer in early spring keeps the foliage deep green.
- Pruning: Shape in late winter, before growth begins, to preserve the flowers that become berries.
Where to use Blue Girl in the garden
Blue Girl suits cold-climate hedges, foundation shrubs, berry-for-winter plantings, and specimen shrubs. Pair a berrying female such as Blue Princess with evergreens and winter-interest shrubs, keeping a Blue Prince nearby to pollinate it.
Common problems and care
Blue hollies are cold-hardy and easy in moist, acidic, well-drained soil and full sun, which gives the heaviest berry set. Watch for the usual holly troubles — leaf miner, scale, and spider mites, and root rot in soggy ground — and head them off with the right site, good drainage, and good air flow. Yellowing leaves usually signal alkaline soil or poor drainage rather than disease.
Blue Girl — frequently asked questions
How big does Blue Girl get?
Blue Girl grows into a dense, rounded to pyramidal evergreen shrub, typically reaching 6-10 ft tall and 6 to 10 feet wide. Its final size depends on your climate, the site, and how you prune it.
Does Blue Girl have berries, and does it need a male holly?
Blue Girl is female and bears red berries, but it needs a compatible male holly flowering within about fifty feet to pollinate it. One male can pollinate several nearby females.
Is Blue Girl evergreen or deciduous?
Blue Girl is evergreen, holding its lustrous blue-green leaves on distinctive purple stems through the winter.
What hardiness zones does Blue Girl grow in?
Blue Girl is hardy in USDA zones 5-8. That range describes the winter cold it can survive; gardeners colder than zone 5 should give it a sheltered site or choose a hardier holly.
Is Blue Girl easy to grow?
Blue hollies are cold-hardy and easy in moist, acidic, well-drained soil and full sun, which gives the heaviest berry set. Give Blue Girl an acidic, well-drained soil and the ordinary seasonal care any holly appreciates, and it is a straightforward, low-maintenance shrub.
When should I prune Blue Girl?
Prune Blue Girl in late winter, while it is dormant and before spring growth begins — that shapes the plant without removing the flower buds that become the next season's berries.