Jack tree
Sinojackia xylocarpa · Styracaceae
📷 Denis.prévôt · CC BY-SA 3.0
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around jack tree and prepare for winter.
ID card
- Scientific name
- Sinojackia xylocarpa
- Family
- Styracaceae
- Type
- Tree
- Mature height
- 5 to 6 meters
- Foliage
- Deciduous
- Flowering
- May to June
- Exposure
- Full sun
- Water requirement
- Moderate
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Sinojackia loves generous sunlight but dreads winter waterlogging. Plant on a mound or slope to encourage autumn and winter drainage.
The common mistake
The classic trap is watering too regularly in autumn-winter: the trunk base rots slowly, leaves yellow and the following spring's flowering can decline rapidly.
The pro's trick
Mulch in summer to retain moisture, but clear 10 cm around the collar when autumn arrives.
Care
Exposure
Plant Sinojackia xylocarpa in full sun to encourage abundant flowering and balanced form. This tree appreciates well-exposed locations, sheltered from strong winds that could damage its branches. A slightly south-westerly exposure works best in temperate regions.
Watering
Keep the soil regularly moist, especially during the first two years after planting and during summer. Reduce watering in autumn and winter, adapting to natural rainfall. Check that water drains well to prevent root suffocation.
Soil
Prefer well-drained soil rich in organic matter and slightly acidic to neutral. Improve the soil at planting time with compost or peat to encourage establishment. This species tolerates fertile, well-structured soils.
Pruning
Prune in late winter or early spring, before growth resumes. Remove dead, crossing, or poorly oriented branches to reveal the tree's natural form. Avoid severe pruning that would slow growth.
Fertilizing
Apply balanced fertilizer in spring as growth begins. An annual application of well-decomposed compost around the base effectively complements nutritional needs. Avoid excess nitrogen, which would encourage foliage at the expense of flowering.
Diseases and pests
This tree is generally very resistant to common diseases. Watch for possible pests, especially during periods of water stress. Good air circulation and regular maintenance prevent most phytosanitary problems.
Did you know?
Sinojackia xylocarpa is a rare tree native to China that fascinates botanists with its characteristic woody fruits. Its name "xylocarpa" literally means "fruit of wood," referring to its capsules that harden with age. This species belongs to the Styracaceae family, renowned for its ornamental members and producers of precious essences.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
- Japanese snowbellStyrax japonicus
- Fragrant snowbellStyrax obassia
- Carolina silverbellHalesia carolina
- BoxwoodBuxus sempervirens
- Pedunculate oakQuercus robur
- CamelliaCamellia japonica
Tips generated and checked by Viridia — adapt them to your local climate.