Harvesting & Processing

⏱️ 9 min read

📅 Last updated: 2024

🌾 Harvesting & Processing

Harvest Calendar — Annual flowering and harvest periods for major jasmine species — J. sambac can be harvested year-round in tropical climates.

Extraction Process Flow — From harvest to final product — the step-by-step process of converting fresh jasmine flowers into essential oil or absolute.

Enfleurage Frame — Traditional enfleurage apparatus — fresh flowers placed on fat-coated glass frames to absorb their fragrance.

Steam Distillation Apparatus — Steam distillation setup — heat drives volatile compounds from flowers through the condenser into the collection flask.

Harvesting Basket — Traditional woven basket used for collecting freshly picked jasmine buds in the early morning hours.

From dawn picking to precious essential oil

Timing is Everything

Harvest between 6:00 AM and 10:00 AM on dry mornings, when flowers have just opened and oil content peaks. Some species are night-harvested (9:00 PM – 2:00 AM).

Harvesting Methods

Stage 1: Bud Selection

Select buds white at the tip, showing color but not yet fully open.

Stage 2: Picking Technique

Pinch stem below calyx, pull gently with twist. Avoid crushing. Speed develops with experience.

Stage 3: Basket Management

Use shallow, ventilated baskets. Never stack more than 3 layers. Transport within 2–4 hours.

Yield Data

Species	Yield (kg/ha/yr)	Season
J. sambac	8,000–15,000	Year-round
J. grandiflorum	5,000–10,000	Aug–Nov (India)
J. officinale	3,000–6,000	Jun–Sep

Processing Methods

Enfleurage

Traditional / Luxury

Flower petals spread on glass plates coated with vegetable fat. Absorbs volatile compounds over 24–72 hours. Repeated 30–40 times. Requires ~8,000 kg flowers per 1 kg absolute.

Output: ~0.1% of flower weight Cost: $8,000–15,000/kg

Solvent Extraction

Commercial Standard

Hexane extracts aromatic compounds. Produces "concrete" then "absolute" after ethanol wash. Most widely used commercial method.

Output: ~0.2–0.3% of flower weight Cost: $2,000–8,000/kg

Supercritical CO₂ Extraction

Modern

CO₂ above critical point (31.1°C, 73.8 atm) as solvent. Cleaner extract, more true-to-nature. Equipment: $500K–$2M.

Output: ~0.25–0.4% of flower weight Cost: $3,000–10,000/kg

Steam Distillation

Common for Oils

Steam carries volatile compounds from flowers. Produces lighter "essential oil" and valuable hydrosol byproduct.

Output: ~0.05–0.1% of flower weight Cost: $500–2,000/kg

Tea Scenting

Food & Beverage

Green/white tea layered with fresh flowers for 4–24 hours. Repeated 5–7 times for premium teas. Ratio: 1 kg tea : 1 kg flowers per cycle.

Cycles: 1–7 (higher = better) Premium: Dragon Pearl, Silver Needle

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