Pittosporum tenuifolium

Pittosporum tenuifolium, commonly known as kohuhu, is a versatile and attractive evergreen shrub or small tree. It’s known for its glossy leaves and fragrant flowers. Here’s a comprehensive care guide to help you maintain a healthy Pittosporum tenuifolium:

Light Requirements

• Sunlight: Pittosporum tenuifolium thrives in full sun to partial shade. For best growth and flowering, provide at least 4 to 6 hours of direct sunlight each day.

Soil Preparation

• Soil Type: This plant prefers well-draining soil. It can tolerate a range of soil types, including sandy and loamy soils. However, it does not do well in heavy clay or waterlogged conditions.
• pH Level: Pittosporum tenuifolium generally prefers slightly acidic to neutral soil (pH 6.0 to 7.0).

Watering

• Initial Watering: Water newly planted Pittosporum thoroughly to help establish the root system.
• Ongoing Watering: Once established, Pittosporum is relatively drought-tolerant but prefers consistent moisture, especially during dry periods. Water regularly, particularly in the first few years. Reduce watering in winter when growth slows.
• Avoid Overwatering: Ensure the soil has good drainage to prevent root rot.

Fertilizing

• Fertilization Schedule: Fertilize in early spring with a balanced, slow-release fertilizer or an organic fertilizer.
• Amount: Follow the manufacturer’s instructions for application rates, as over-fertilization can harm the plant.

Mulching

• Mulch Layer: Apply a 2- to 4-inch layer of organic mulch (like wood chips or bark) around the base of the plant, keeping it away from the trunk.
• Benefits: Mulching helps retain soil moisture, suppress weeds, and regulate soil temperature.

Pruning

• Pruning Time: Prune in late winter or early spring before new growth begins. This is also a good time to remove any dead or damaged branches.
• Technique: Light pruning can help shape the plant and encourage bushy growth. Regular trimming can help maintain the desired size and shape.

Pest and Disease Management

• Monitoring: Regularly check for pests such as scale, aphids, and spider mites. Treat infestations promptly with insecticidal soap or neem oil.
• Diseases: Pittosporum is generally resistant to many diseases but can be affected by root rot if overwatered or planted in poorly drained soil.

Climate and Environmental Needs

• Hardiness Zones: Pittosporum tenuifolium is typically hardy in USDA zones 9 to 10. It prefers warm, coastal conditions but can tolerate some frost.
• Wind Protection: If you live in a windy area, consider providing some protection, as strong winds can damage the foliage.

Uses in the Landscape

• Versatile Planting: Pittosporum tenuifolium can be used as a hedge, specimen plant, or in mixed borders. Its fragrant flowers and glossy foliage make it an attractive addition to any landscape.

Pittosporum tenuifolium – Spacing Guide

When planting Pittosporum tenuifolium for either an instant formal hedge or an informal hedge, spacing will depend on the desired effect and container size. Below are the recommended spacing options, along with the number of shrubs needed for 20 linear feet.

Instant Formal Hedge Spacing

For immediate, dense coverage, full look upon planting. Use the following spacing recommendations based on container size:

Informal Hedge Spacing

For a more relaxed and natural look, consider the following spacing recommendations:

On-Center Spacing

On-center spacing is measured from the center of one plant to the center of the next plant. This method ensures even distribution and helps achieve a uniform hedge.