Rosemary Plant Material and Essential Oil Yield per Acre
The average rosemary yield of fresh plant material is 20 tons per hectare, or 8 tons (17636 lbs.) per acre (keep in mind that 1 hectare = 2,47 acres = 10.000m2, 1 ton = 1000 kg = 2205 lbs.). The average relation “dried:fresh” material is normally 1:3. Consequently, the average rosemary yield of dried material is 6,7 tons per hectare or 2,7 tons (5952 lbs.) per acre.
However, this involves the whole plant (stems and leaves). The average yield of dried leaf is 2,5 tons per hectare, or 1 ton (2205 lbs.) per acre. The average concentration of essential oil is close to 0,3% of total fresh plant mass harvested. Consequently, you can expect an average yield of 60 kg (132 lbs.) essential oil per hectare, or 24 kg (53 lbs.) per acre.
Keep in mind that these average yields are annual and these figures refer to healthy and mature (older than 3 years old) plants that are managed by professional growers. Keep also in mind that there can be significant deviations from these figures, as the yield greatly depends on many parameters (variety, climate, soil condition, fertilization, irrigation, weed and pest control, harvesting, distillation methods etc.).
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Rosemary Plant and Essential Oil Yield
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