Thiourea 99% for lychee – A guide to even flowering
Lychee – hard to flower evenly without good treatment
Lychee trees (vải thiều, vải u hồng…) often have problems with:
Uneven flowering
Low fruit set, easy flower and young fruit drop
Difficult off-season treatment to increase crop value
Traditional methods (water withholding, pruning) are labour-intensive with inconsistent results.
Thiourea 99% is a modern option that helps:
✅ Wake dormant buds and promote flower-bud differentiation
✅ Improve even flowering and fruit set
✅ Save time and labour
Effects of Thiourea 99% on lychee
- Breaks dormancy: brings the tree out of the physiological rest period
- Stimulates flower-bud differentiation: even flowering, long and strong flower clusters
- Supports fruit set: limits flower and young fruit drop, improves yield
How to use Thiourea 99% on lychee
| Item | Details |
|---|---|
| Rate | 1,0 – 1,5% (10–15g Thiourea 99%/1 litre of water) |
| Timing | 3–4 weeks after harvest, once the tree has recovered well |
| How to spray | Spray evenly over the canopy, dormant buds and shoots to be treated |
| Number of treatments | 1–2 times, 10–12 days apart if needed |
| Adjuvant | Add Viet-up 90 for better adhesion and rainy-season results |
Technical notes
✅ Treat only healthy trees without severe pest or disease problems
✅ Do not spray when it is raining or rain is coming
✅ Avoid spraying when the tree is producing strong new flushes
Read more: Thiourea 99% and off-season flower induction in dragon fruit
What is dormancy breaking? The role of Thiourea 99% in off-season treatment
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