Ilex cren Sky Box® Description
Sky Box™ Japanese holly (Ilex crenata) is a skinny little space-saving evergreen that’s just perfect for adding a dash of formality and structure just about anywhere! Long a best seller from Proven Winners, it naturally grows with a neat pyramidal habit. Pruning is not required to enjoy this striking shape, but it can be pruned as desired and even made into topiaries. It’s ideally suited to containers or planting on either side of a doorway, or as a centerpiece in a formal herb garden.
Japanese holly has tiny, spoon-like leaves that contribute great texture all year round. It can grow in full sun or part shade, but in too much shade, its habit will be more open instead of dense and lush. Does best when protected from strong winds and not allowed to dry out severely.
Special features: Evergreen, Topiary, Containers
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- Botanical name: Ilex crenata 'Farrowone'
- Common name:
- Sun exposure:
Full sun (min. 6 hrs/day) to part shade (4-6 hrs/day)
- Ship form:
- Soil type:
Moist, well-drained soil.
- Soil moisture:
Average. Leaves can brown if it becomes too dry too often.
- Height x width:
4-5' tall and wide (at base – pyramidal shape is very narrow at top)
- Flower color:
- Foliage color:
- Season of interest:
Specimen, Containers, Narrow hedge, Formal gardens, Topiary
- Patent:USPP 20,049
- Cannot ship to:
AK, CAN, HI, PR
More Info, How-To's, Videos and more
Soil: Moist but well-drained soils are best. If broadleaf evergreens like Japanese holly dry out too much, their foliage will begin to brown.
Light: Full sun (6+ hrs/day) to part shade (4-6 hrs/day).
Water: Average to abundant (as long as soil is well-drained).
Space: 3-5' apart, depending on landscape role.
Fertilizing: If desired, fertilize in early spring, once the ground has thawed, with a granular rose fertilizer. A second application may be made in late spring/early summer as well. If growing in a container with annuals that you'll be fertilizing regularly, you can skip the spring application.
Winterizing: 2-3" of shredded bark mulch is important to protect the shallow roots and minimize water loss. Do not allow plants to enter winter "thirsty" – dry soil during cold, windy weather is the main cause of leaf browning or even the plant dying.
Maintenance: Trim as needed to maintain shape and size desired. Save major pruning for mid-late spring, after new growth has emerged but before it becomes hard and woody.
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