Classification
Product TypeRaw Material
Product FormDried
Industry PositionPrimary Agricultural Product
Raw Material
Commodity GroupDried aromatic herb / botanical sweetener crop
Scientific NameStevia rebaudiana (Bertoni) Bertoni
PerishabilityLow (dried), moisture-sensitive
Growing Conditions- Cultivated across subtropical to warm-temperate regions; growth and leaf glycoside profile are influenced by photoperiod, temperature, and water availability
- Common agronomy references describe suitability for semi-humid/subtropical climates and well-drained soils (often reported near neutral pH ranges in cultivation reviews)
Consumption Forms- Herbal tea/infusions (as a leaf ingredient for sweetness)
- Upstream raw material for extraction and purification to steviol glycosides
- Dietary supplement ingredient in some markets (jurisdiction- and claim-dependent)
Grading Factors- Moisture and evidence of rewetting/mold
- Leaf-to-stem ratio and foreign matter
- Color/odor (off-odors from poor drying or storage)
- Steviol glycosides content/profile (when destined for extraction)
- Pesticide residues and heavy metals (buyer and destination-market limits)
- Microbiological criteria consistent with dried aromatic herb expectations
Planting to HarvestHarvest timing is commonly managed around pre-flowering or flower-bud initiation; field studies in temperate settings report optimal harvest around early September (pre-flowering) with growth cycle length dependent on planting time, photoperiod, and management (single-cut to multi-cut systems in suitable climates).
Market
Dried stevia leaf (Stevia rebaudiana) is a traded botanical raw material used both as an herbal infusion ingredient and as upstream feedstock for producing purified steviol glycosides used in food and beverage reformulation. Global leaf supply is concentrated, with peer‑reviewed literature estimating China accounts for a dominant share of world dry leaf production (e.g., ~80% in 2016), while cultivation also occurs in South America and multiple other countries. Market access is shaped by regulatory distinctions between whole leaf/crude extracts versus high‑purity steviol glycosides (INS 960 / E 960), which are widely evaluated and permitted as sweeteners in many jurisdictions. This regulatory split makes demand for dried leaf more sensitive to end‑use (tea/supplement vs sweetener ingredient) and documentation of compliance, traceability, and hygiene controls for dried herbs.
Market GrowthGrowing (medium-to-long term)growth in reduced-sugar reformulation using steviol glycosides, with more variable growth for whole-leaf trade depending on regulatory acceptance by use-case
Major Producing Countries- 중국Peer‑reviewed literature estimates China has dominated global dry stevia leaf production (e.g., ~80% of world stevia leaves output in 2016).
- 브라질Cultivation occurs in the species’ native region; recent reviews describe Brazil as among larger producers by area/output, though comparable official global statistics are not consistently published for leaf.
- 파라과이Country of origin (ka’a he’ê); commercial cultivation exists but some peer‑reviewed sources note smaller scale in countries of origin relative to Asia.
Specification
Physical Attributes- Dried whole or cut leaves with characteristic sweet/herbal aroma; discoloration, excess stem content, and foreign matter are common buyer-rejection drivers
- Moisture sensitivity: quality is strongly affected by post-harvest drying, storage humidity, and protection from odors
Compositional Metrics- Steviol glycosides profile and concentration in leaves (commonly focused on stevioside and rebaudioside A) varies by genotype, agronomy, and harvest timing
- Harvest timing is commonly managed around pre-flowering/bud initiation to support higher glycoside yield in field studies
- Buyer specifications commonly include moisture limits plus pesticide residue and microbiological criteria typical for dried aromatic herbs
Grades- No single global grade standard is uniformly used for dried stevia leaf; commercial trade is typically governed by buyer specifications (leaf-to-stem ratio, foreign matter, moisture, residues, and microbiology) and, where relevant, organic certification schemes
Packaging- Moisture-barrier inner liner (e.g., food-grade polyethylene) with outer sacks/cartons to reduce humidity pickup during storage and ocean freight
- Lot-coded packaging supporting traceability (farm/collection, drying lot, and any microbial-reduction step where applied)
ProcessingFor sweetener supply chains, dried leaf may be milled and aqueous-extracted as an upstream step toward purified steviol glycosides; for herbal channels, leaf is cut/sieved for infusion blends with minimal processing beyond drying and cleaning
Supply Chain
Value Chain- Cultivation (often in subtropical to warm-temperate zones) -> harvest timed around pre-flowering -> drying (field/shed/mechanical) -> leaf stripping and cleaning/sieving -> optional microbial reduction treatment -> moisture-proof packing -> export/import -> (a) tea blending/retail packing or (b) industrial extraction to steviol glycosides
Demand Drivers- Reduced-sugar product reformulation demand for steviol glycosides (upstream pull-through to leaf in some supply chains)
- Herbal infusion and specialty tea blends using stevia leaf for sweetness
- Demand for plant-based sweetening ingredients with label positioning that varies by jurisdiction (food vs supplement vs tea)
Temperature- Ambient logistics are typical, but quality preservation depends on keeping the product dry, cool, and protected from heat spikes and odor contamination
- Moisture control (low relative humidity, sealed liners, desiccants where appropriate) is often more critical than temperature control for dried leaf
Risks
Regulatory Compliance HighMarket access is highly sensitive to how stevia leaf is positioned and regulated: in the United States, FDA states whole stevia leaf and crude extracts are not considered GRAS for use as sweeteners and that import for use as sweeteners is not permitted, creating detention and enforcement risk for mislabeled or improperly positioned products. In the EU, determinations can vary by form and intended use (e.g., specific consultations have addressed stevia-leaf infusions), so documentation of intended use and applicable legal basis is essential.Define destination-market regulatory pathway by product form and use-case (tea/infusion vs sweetener ingredient vs supplement), align labeling/claims accordingly, and maintain import-ready documentation (specs, COAs, traceability, and regulatory opinions where applicable).
Supply Concentration MediumPeer-reviewed literature has estimated that global dry stevia leaf output has been heavily concentrated in China (e.g., ~80% in 2016), increasing exposure to localized weather shocks, policy changes, plant disease pressure, and logistics disruptions that can propagate globally.Diversify approved origins and qualify multiple suppliers across regions; maintain safety stock for industrial users and pre-book drying/processing capacity during peak harvest windows.
Food Safety MediumAs a dried aromatic herb, stevia leaf can face microbial and filth hazards if drying, storage, and handling are inadequate; international buyers may require preventive controls and, in some cases, validated microbial reduction treatments consistent with Codex hygienic practice guidance for spices and dried aromatic herbs.Implement GAP/GMP aligned to Codex codes for dried herbs, control drying parameters and water activity, protect packed goods from rewetting, and use risk-based microbiological and residue testing with lot-level traceability.
Sustainability- Residue management and environmental controls consistent with dried herb supply chains (agrochemical stewardship, drift control, and documented compliance testing)
- Quality losses and waste risk from inadequate drying and humidity control (mold growth, off-odors), increasing the footprint per unit of usable product
FAQ
Is dried stevia leaf treated the same as purified steviol glycosides in food regulations?Often no. Many regulators distinguish whole stevia leaf/crude extracts from high‑purity steviol glycosides (INS 960 / E 960). For example, FDA notes it has no questions about GRAS conclusions for certain high‑purity steviol glycosides, while stating stevia leaf and crude extracts are not considered GRAS for use as sweeteners in the U.S.
Which country dominates global dried stevia leaf production?Peer‑reviewed literature has estimated strong concentration in China, including an estimate that around 80% of world stevia leaves production was from China in 2016. Exact shares can vary by year and are not consistently reported in an official global crop-statistics category for stevia leaf.
What are the most common commercial quality specifications for dried stevia leaf?Global trade typically relies on buyer specifications rather than a single universal grade, commonly covering moisture/foreign matter and safety parameters (pesticide residues and microbiological criteria) used for dried aromatic herbs, plus leaf-specific performance measures such as steviol glycosides content/profile when the leaf is destined for extraction.