American Holly
Jersey Princess
Evergreen · Female · Red berries · Zones 5-9
American Holly
Jersey Knight
The standard male pollinator for American hollies; no berries of its own.
Jersey Knight is an evergreen american holly valued for its dense, dependable evergreen habit and its easy, resilient growth. Below is a full profile of Jersey Knight — its characteristics, how to grow it, whether it needs a pollinator for berries, and answers to the questions gardeners ask most.
About Jersey Knight
Jersey Knight belongs to the american holly, a group defined by a dense, broadly pyramidal large shrub or small tree. Ilex opaca is the quintessential native Christmas holly of the eastern United States, grown as much for the birds it feeds as for the greenery it supplies.
Jersey Knight is evergreen and hardy across USDA zones 5-9, so it suits a wide range of gardens with the right acidic, well-drained soil and seasonal care.
Characteristics and form
Jersey Knight makes a dense, broadly pyramidal large shrub or small tree, typically around 20-30 ft tall and 10 to 20 feet wide at maturity. Its foliage is matte, dark green, stiff leaves edged with sharp spines. Knowing a holly's mature size and habit is the key to placing it well: give Jersey Knight room to reach its full spread without crowding, which also keeps air moving through the plant and disease at bay.
Berries and pollination
Jersey Knight is a male holly. It bears no berries of its own; its value is as a pollinator, supplying the pollen that nearby female hollies need to fruit — and as a handsome evergreen in its own right.
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 Jersey Knight
Plant Jersey Knight where it will get full sun to part shade in acidic, moist, well-drained soil. Full sun gives the densest growth. 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.
- 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.
- 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 Jersey Knight in the garden
Jersey Knight suits specimen trees, tall screens and windbreaks, native and wildlife plantings, and holiday greenery. Underplant it with acid-loving shrubs such as azaleas, rhododendrons, and mountain laurel, or let it anchor a native woodland edge.
Common problems and care
American holly is tough and long-lived, asking mainly for acidic, well-drained soil and protection from harsh drying wind in the coldest zones. 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.
Jersey Knight — frequently asked questions
How big does Jersey Knight get?
Jersey Knight grows into a dense, broadly pyramidal large shrub or small tree, typically reaching 20-30 ft tall and 10 to 20 feet wide at maturity. Its final size depends on your climate, the site, and how you prune it.
Does Jersey Knight have berries, and does it need a male holly?
No. Jersey Knight is a male holly, so it does not bear berries. Its role is to pollinate nearby female hollies so that they can fruit.
Is Jersey Knight evergreen or deciduous?
Jersey Knight is evergreen, holding its matte, dark green, stiff leaves edged with sharp spines through the winter.
What hardiness zones does Jersey Knight grow in?
Jersey Knight is hardy in USDA zones 5-9. 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 Jersey Knight easy to grow?
American holly is tough and long-lived, asking mainly for acidic, well-drained soil and protection from harsh drying wind in the coldest zones. Give Jersey Knight 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 Jersey Knight?
Prune Jersey Knight 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.