Jooni
Spindle
3 Species
Species
Fertilizing
Feed your Japanese Spindle bonsai every two weeks throughout the growing season from late spring through summer. Use a balanced fertilizer containing nitrogen, phosphorus, and potassium, either as half-strength plant food or slow-release pellets. To enhance autumn coloration, reduce nitrogen levels from mid-summer onwards. Continue fertilizing until mid-autumn, ideally using organic fertilizers applied with irrigation water. Remember that bonsai trees need less fertilizer than regular plants due to their smaller size.
Placement
Position your Japanese Spindle bonsai in a bright location but avoid intense direct sunlight, especially during summer afternoons. While these trees are generally hardy, they require protection when temperatures drop below -5°C (23°F). During severe frost, move the tree to an unheated greenhouse or conservatory, or provide insulation for the pot. Keep the tree away from heating vents and air conditioners to avoid sudden temperature changes. Proper placement ensures both healthy growth and optimal display of your bonsai's ornamental features.
Pruning
Maintain your Japanese Spindle's shape through regular pruning during the growing season. Begin with primary pruning in early spring as new buds start to appear, then continue with 2-3 maintenance pruning sessions throughout the growing period. For denser foliage, perform light pinching of new growth. Cut back new shoots to 2-3 leaves when conducting detailed pruning work. While this species isn't commonly wired, if you choose to wire branches, do so before spring growth begins and protect the delicate bark. Note that for fruit production, you'll need multiple specimens for cross-pollination.
Repotting
The repotting schedule for Japanese Spindle bonsai varies with age. During the first ten years, repot annually in early spring just before new buds begin extending. After the tree reaches ten years of age, reduce repotting frequency to every 2-3 years. Use a basic, well-draining bonsai soil mixture with a neutral to slightly basic pH. When repotting, take care not to overly disturb the root system and ensure proper drainage in the new pot to prevent root rot.
Watering
Maintain consistent moisture for your Japanese Spindle bonsai without overwatering. During the growing season, especially summer, water daily but allow the top layer of soil to dry slightly between waterings. Check moisture levels by inserting your finger about an inch into the soil - water thoroughly when it feels dry at this depth. Regular misting is beneficial during the growing season to maintain humidity, but avoid waterlogging the soil as this can lead to root problems. Reduce watering frequency in winter when the tree's water needs decrease.