Tibouchina granulosa, also known as the Purple Glory Tree, thrives with regular watering (checking soil moisture before watering), proper sunlight (full sun to partial shade), fertilization during the growing season, and regular pruning to maintain shape and encourage new growth. It’s also important to monitor for pests and diseases, and protect from frost in non-tropical climates.
Here’s a more detailed breakdown of Tibouchina granulosa care:
1. Watering:
Regular Watering: Tibouchinas are tropical plants that need consistent moisture, but avoid overwatering.
Check Soil Moisture: Before watering, check the topsoil. If it’s moist, delay watering.
Mulching: Use mulch to help retain soil moisture.
Deep Watering: Once established, a deep watering once a week may be sufficient, especially in areas with moderate to high rainfall.
2. Sunlight:
Full Sun to Partial Shade: Tibouchinas prefer full sun, but they can also thrive in partial shade, especially in hot climates.
Minimum Sunlight: For optimal blooming, 6-8 hours of sunlight daily is recommended.
3. Fertilizing:
Fertilize During Growing Season:Fertilize during spring and summer, typically monthly.
Liquid Fertilizer: Use a complete liquid fertilizer with an NPK ratio of 20-20-20.
Dry Fertilizer: Dry fertilizers can also be used.
Espoma Holly-Tone: Espoma Holly-Tone can be applied in March and September, using ½ to 1 cup per plant.
4. Pruning:
Prune After Flowering: Prune after the flowers fade to encourage new growth and more flowers next season.
Maintain Shape: Prune to maintain the plant’s desired shape.
Remove Drooping Branches: Prune to remove lower branches that droop to the ground.
Pinch New Growth: Pinching new growth can promote branching and enhance the floral display.
5. Pest and Disease Control:
Monitor for Pests: Keep an eye out for pests like aphids and spider mites.
Treat Pests: Use insecticidal soap if necessary.
Monitor for Diseases: Early detection and treatment can prevent major issues.