Japanese Cheesewood
Pittosporum tobira
Pittosporum tobira, commonly known as Japanese Cheesewood, is a versatile evergreen shrub native to East Asia. Its fragrant flowers and lush foliage make it a popular choice for gardens, providing both beauty and structure.
Everything it needs
9 essentials at a glance
Watering
Pittosporum tobira prefers to be watered deeply but infrequently.
Water every 1-2 weeks during the growing season, allowing the top inch of soil to dry out between waterings. In winter, reduce watering to once every 3-4 weeks. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause leaf drop and wilting.
Light
This plant thrives in full sun to partial shade, ideally receiving 6-8 hours of direct sunlight daily.
It can tolerate some shade but may become leggy if not provided enough light. Avoid placing it in full shade, as this can hinder its growth and flowering.
Soil
Pittosporum tobira prefers well-draining soil with a pH range of 6.0 to 7.5.
A mixture of loamy soil with sand or perlite works well to ensure good drainage. Avoid heavy clay soils that retain moisture, as this can lead to root issues.
Humidity
This plant does well in average household humidity but prefers slightly higher levels of around 40-60%.
To increase humidity, mist the leaves regularly or place a humidifier nearby. Signs of humidity stress include browning leaf tips and edges.
Temperature
Pittosporum tobira thrives in temperatures between 60-75°F (15-24°C).
It is hardy in zones 8-10 and can tolerate brief periods of cold down to 20°F (-6°C). In extreme heat, ensure adequate watering to prevent stress.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10 during the growing season, applying every 4-6 weeks.
In fall and winter, reduce feeding. Signs of nutrient deficiency include yellowing leaves and poor growth.
Pruning
Prune Pittosporum tobira in late winter or early spring to maintain its shape and encourage bushier growth.
Use sharp, clean pruning shears to remove dead or damaged branches. Deadheading spent flowers can promote further blooming.
Repotting
Repot every 2-3 years or when the roots outgrow the pot.
Signs it needs repotting include roots growing out of the drainage holes and stunted growth. Choose a pot that is 1-2 inches larger in diameter, and refresh the soil during repotting.
Propagation
Propagation can be done through stem cuttings or seeds.
For stem cuttings, take 4-6 inch cuttings in spring, remove the lower leaves, and place them in a moist potting mix. Keep the cuttings in a warm, humid environment until roots develop, which usually takes 4-6 weeks. Seeds can be sown in spring after a cold stratification period.
When it's unhappy
Yellow leaves
Why it happens
Often caused by over-watering or nutrient deficiency.
How to fix it
Check soil moisture levels and adjust watering schedule. Fertilize if nutrient deficiency is suspected.
Leaf drop
Why it happens
Can occur due to sudden temperature changes or under-watering.
How to fix it
Ensure consistent watering and protect the plant from drafts or extreme temperature fluctuations.
Root rot
Why it happens
Caused by overly wet soil and poor drainage.
How to fix it
Remove the plant from its pot, trim away affected roots, and repot in fresh, well-draining soil.
Pests (e.g., aphids, spider mites)
Why it happens
Commonly attracted to stressed plants or those in low humidity.
How to fix it
Treat with insecticidal soap or neem oil, and improve humidity and care to prevent future infestations.
Leggy growth
Why it happens
Insufficient light exposure.
How to fix it
Move the plant to a brighter location to encourage bushier growth.
Care through the year
Spring
In spring, focus on fertilizing and pruning to encourage new growth. Monitor for pests as the weather warms.
Summer
During summer, ensure consistent watering and protect from extreme heat. Regularly check for pests and diseases.
Fall
In fall, reduce watering frequency as the plant enters dormancy. Prepare for winter by checking for any necessary pruning.
Winter
In winter, minimize watering to once every 3-4 weeks. Protect the plant from frost and cold drafts.
Toxicity & Safety
Pittosporum tobira is mildly toxic to pets and humans. Ingestion of the leaves or seeds can cause gastrointestinal upset, including vomiting and diarrhea. Keep out of reach of children and pets.
Good to know
Why are my Pittosporum tobira leaves turning yellow?
Yellowing leaves can indicate over-watering or a nutrient deficiency. Check the soil moisture and adjust your watering schedule accordingly.
How often should I water my Japanese Cheesewood?
Water every 1-2 weeks during the growing season, allowing the top inch of soil to dry out between waterings. Reduce frequency in winter.
What type of soil is best for Pittosporum tobira?
A well-draining soil with a pH of 6.0 to 7.5 is ideal. A mix of loamy soil with sand or perlite ensures good drainage.
How can I propagate my Cheesewood plant?
You can propagate Pittosporum tobira through stem cuttings or seeds. For cuttings, take 4-6 inch pieces in spring and root them in moist potting mix.
What pests should I watch for on my Japanese Mock Orange?
Common pests include aphids and spider mites. Regularly inspect the leaves and treat infestations promptly with insecticidal soap or neem oil.
When is the best time to prune Pittosporum tobira?
The best time to prune is late winter or early spring before new growth begins. This helps maintain shape and encourages bushier growth.
Is Pittosporum tobira toxic to pets?
Yes, it is mildly toxic to pets and humans. Ingestion of leaves or seeds can cause gastrointestinal upset, so keep it out of reach.
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