Foliage: The leaves are dark green, elliptic, and provide a dense, deciduous appearance. The foliage turns yellow in the fall before dropping.

Flowers: Produces small, inconspicuous white flowers in late spring to early summer. As a male plant, Ilex "Raritan Chief" does not produce berries but is essential for pollinating nearby female winterberries.

Light Requirements: Prefers full sun to partial shade. "Raritan Chief" thrives best in full sunlight, which encourages the healthiest growth and maximizes its role as a pollinator for female winterberries. It can tolerate partial shade, but full sun will ensure the most robust flowering and overall plant health.

Soil Requirements: Prefers moist, well-draining, acidic soil. This hybrid winterberry grows best in rich, loamy soil with a pH range of 4.5-6.5. It is adaptable to various soil types, including sandy and clay soils, as long as they retain moisture. Adding organic matter, such as compost or peat moss, to the soil will improve its fertility and structure, helping to support the plant’s overall health.

Watering: Requires regular watering, especially during dry periods. "Raritan Chief" prefers consistently moist soil, particularly during the growing season. While it can tolerate wet soils, it does not do well in waterlogged conditions. To keep the soil moist and cool, apply mulch around the base of the plant, which will also help retain moisture during hotter months.

Temperature and Humidity: Hardy in USDA zones 5-9. "Raritan Chief" is well-suited to a range of climates and is particularly valued for its cold hardiness. It can withstand cold winters and frost, making it an excellent choice for gardens in colder regions. The plant prefers moderate humidity levels but can adapt to varying conditions.

Fertilization: Apply a balanced, slow-release fertilizer in early spring to support healthy growth and flowering. An additional application in mid-summer can help sustain the plant during its peak growing season. Organic fertilizers, such as compost or well-rotted manure, are beneficial for maintaining soil fertility and supporting overall plant health.

Pruning: Prune lightly in late winter or early spring before new growth begins. As "Raritan Chief" is typically a male plant and does not produce berries, pruning can be more extensive if necessary to control its size or shape. Pruning helps maintain a dense, attractive form and encourages new growth.

Pests and Problems: Generally pest-resistant but may occasionally encounter issues with common garden pests like aphids or scale insects. Ensuring good air circulation around the plant can help prevent fungal diseases such as leaf spot or powdery mildew. If pests or diseases are detected, treat with insecticidal soap or neem oil. Regular monitoring and maintaining good garden hygiene are key to keeping the plant healthy.