Below is a professional, TESDA-aligned, and field-applicable module on Seasonal Timing & Leaf Maturity Index for Aquilaria spp., written for Oud Academia training, community-based programs, and plantation SOPs.
This is non-resin, food-grade, and regulatory-safe.
Seasonal Timing & Leaf Maturity Index
for Sustainable Agarwood Leaf Harvesting
1. Why Seasonal Timing & Leaf Maturity Matter
Correct timing ensures:
- Optimal leaf quality for tea
- Preservation of bioactive compounds
- Faster tree recovery
- Long-term plantation sustainability
Key principle:
Harvest the right leaf, at the right time, in the right season.
2. Seasonal Growth Patterns of Aquilaria (Tropical Context – Philippines)
A. Dry Season (November–April)
Recommended harvesting window
- Lower leaf moisture content
- Reduced fungal pressure
- Easier drying and storage
- Stable flavor profile
✅ Best season for leaf harvesting
B. Wet Season (May–October)
Restricted harvesting
- Higher moisture content
- Increased risk of leaf damage and mold
- Slower drying
⚠️ Harvest only if:
- Proper drying facilities exist
- Weather conditions allow controlled drying
3. Leaf Flush & Regrowth Cycle
- New leaf flush occurs after:
- Rainfall
- Light pruning
- Full maturity reached in:
- 6–8 weeks after emergence (average)
4. Leaf Maturity Index (LMI)
Leaf Selection Guide
| Indicator | Immature Leaf | Optimal Mature Leaf | Overmature Leaf |
|---|---|---|---|
| Color | Light green | Deep green | Yellowing |
| Texture | Soft, thin | Firm, leathery | Brittle |
| Aroma | Grassy | Clean herbal | Dull |
| Size | Small | Full size | Curling |
| Bioactive stability | Low | Optimal | Declining |
| Suitability for tea | ❌ | ✅ Best | ❌ |
5. Quantitative Leaf Maturity Index (Training Tool)
LMI Scoring (1–5 scale):
| Parameter | Score 1 | Score 3 | Score 5 |
|---|---|---|---|
| Color | Pale | Uniform green | Dark green |
| Texture | Very soft | Firm | Hard |
| Vein clarity | Faint | Visible | Prominent |
| Flexibility | Limp | Flexible | Brittle |
| Damage | High | Minor | None |
✅ Ideal Harvest Range:
LMI Score 3.5–4.5
6. Canopy Position & Leaf Quality
| Canopy Level | Harvest Recommendation |
|---|---|
| Upper canopy | ⚠️ Limited (sun stress) |
| Middle canopy | ✅ Ideal |
| Lower canopy | ⚠️ Selective only |
7. Harvest Timing During the Day
- Best: Early morning (after dew dries)
- Avoid: Midday heat and late afternoon
8. Integration with Ethical Pruning Rules
- Do not exceed:
- 20–30% leaf removal
- Allow:
- 6–8 weeks recovery before next harvest
- Always maintain:
- Healthy canopy balance
9. Practical Field Checklist (TESDA Use)
✔ Correct season
✔ Mature leaf stage confirmed
✔ LMI within acceptable range
✔ Weather suitable for drying
✔ Ethical pruning limits observed
10. TESDA-Aligned Learning Outcomes
Learners will be able to:
- Identify seasonal harvesting windows
- Apply the leaf maturity index
- Select optimal leaves for tea processing
- Schedule ethical harvest cycles
11. Training Disclaimer
This module applies to food-grade agarwood leaf harvesting only.
Resin induction and destructive harvesting are excluded.
✅ Ideal For:
- TESDA CBLM & assessment tools
- Oud Academia field training
- Plantation SOPs
- Infographics & posters
If you want next, I can:
- Convert this into a 1-page field infographic
- Create a laminated harvest card
- Add this into your TESDA Form 3 (Facilities & Tools)
- Prepare a practical assessment rubric
Just let me know how you’d like to proceed.