Stevia Farming in India — Organic Cultivation Guide

Stevia (Stevia rebaudiana) is the world’s only commercially viable zero-calorie natural sweetener crop, and its leaves contain steviol glycosides that are 250–300× sweeter than sugar. Global demand for stevia extract has grown at 8–10% annually as food companies reformulate products for diabetic and health-conscious consumers. India is emerging as a major stevia producer, with several large processors — Morita Chemicals, PureCircle, and domestic companies — offering contract farming agreements that guarantee buyback at ₹55–80/kg dried leaf. For Mandya farmers, stevia is a compact, irrigation-efficient crop that can generate ₹1–2 lakh/acre per 90-day cutting cycle with 3–4 cuts per year from a single planting.

What Are the Key Facts to Know Before Planting Stevia?

Stevia farming in India is most successful under contract farming arrangements. Processors supply tissue culture (TC) planting material, provide technical guidance, guarantee minimum purchase prices, and ensure quality standards are met. Attempting to grow stevia without a buyer agreement leads to the common problem of having high-quality leaves with no reliable market access.

Contact these before planting:

• Morita Chemicals India (Pune) — established contract programme
• Natural Sweet Solutions (Bangalore) — Karnataka-based processor
• Organic Mandya’s network for group contract negotiations

Which Stevia Varieties Are Available in India?

Stevia planting material in India comes almost exclusively as tissue culture plantlets (not seeds — stevia seeds have poor germination and very low stevioside content). TC plantlets are produced from select high-glycoside parent clones:

• RSIT 95-10-11: Most widely used clone in India; 10–12% stevioside content; high yield; good adaptability
• RSIT 94-751: Higher stevioside concentration (12–14%); slightly lower yield; premium processing value
• Imported clones from Paraguay (Bertoni origin): higher quality but expensive TC material; suitable only with premium contract at ₹70+/kg

All commercial Indian varieties are vegetatively propagated TC plants — purchase only from certified TC labs or directly from processor-supplied nurseries.

What Soil and Field Preparation Does Stevia Require?

Stevia requires:

• Well-drained sandy loam or red loam soils; pH 6.5–7.5
• High organic matter: target 2% organic carbon minimum
• No waterlogging — even 24 hours of water standing kills plants
• Full sunlight (minimum 8 hours/day)

Preparation:

1. Deep plough; prepare raised beds 90 cm wide, 15–20 cm raised (critical for drainage)
2. Mix vermicompost 2 tonnes/acre + neem cake 200 kg/acre into bed soil
3. Mulch beds with paddy straw or sugarcane trash 5 cm thick — conserves moisture and suppresses weeds
4. Install drip irrigation at 30 cm emitter spacing before planting

Planting density: 40,000–50,000 plants/acre on raised beds with 30 cm × 30 cm spacing; drip irrigated. High density maximises leaf yield per acre.

How Do You Plant and Establish Stevia Successfully?

Plant TC plantlets after hardening in shade for 5–7 days. Plant in evening or on cloudy days. Water immediately after transplanting. Maintain light shade for 7–10 days using 30% shade net — stevia TC plants are sensitive to transplant shock under full sun.

Establishment irrigation: twice daily for 7 days; once daily for next 15 days; then drip schedule.

First harvest (cutting): 60–75 days after transplanting. Subsequent cuttings every 70–90 days. A planting typically lasts 3–5 years with annual replanting of 20% to maintain stand density.

What Is the Organic Nutrition Schedule for Stevia?

Stevia is a moderate feeder that responds well to balanced organic nutrition:

• At planting: 2 kg vermicompost per 10 plants mixed into soil
• Monthly jeevamrutha drench: 200 litres/acre — essential for microbial community that supports glycoside production
• Panchagavya foliar: 3% spray every 30 days — improves leaf density and stevioside content
• Neem cake top-dress: 100 kg/acre at 45 days — slow nitrogen release + nematode suppression
• Avoid excess nitrogen — high N pushes vegetative growth but dilutes stevioside concentration, reducing leaf processing value

How Do You Manage Stevia Pests and Diseases Organically?

White fly: Most common pest; causes direct feeding damage and sooty mould. Install yellow sticky traps at 10 per acre. Spray neem oil 5 ml/L + soap solution at 10-day intervals.

Septoria leaf spot: Fungal; appears as grey-brown spots on older leaves. Remove affected leaves; improve air circulation; spray dilute buttermilk (5%) or copper oxychloride 3g/L at first symptom.

Root rot: Only in poorly drained soil. Raised beds prevent this effectively.

Aphids: Spray neem oil 5 ml/L; introduce ladybird beetles as biological control.

How and When Do You Harvest Stevia Leaves?

Cut plants at 10–15 cm above ground when 50% of plants show flower buds — this is the highest stevioside concentration stage. Do NOT wait for full flowering — glycoside content drops sharply after flowers open.

Drying: Spread cut stems on clean raised drying nets or clean concrete floor; dry in sun 2–3 days to below 10% moisture. Shade-drying retains better colour (green) but takes 5–7 days. Processors typically require less than 10% moisture; test with moisture meter before delivery.

Yield per cutting: 400–600 kg dried leaf/acre/cut; 3–4 cuts per year = 1,500–2,400 kg/acre/year.

What Is the Income Potential from Organic Stevia Farming?

Scenario	Dried leaf/acre/year	Contract price	Gross income
Conservative (3 cuts)	1,500 kg	₹60/kg	₹90,000
Standard (3–4 cuts)	1,800 kg	₹65/kg	₹1,17,000
Optimised (4 cuts)	2,400 kg	₹70/kg	₹1,68,000

Input costs: ₹40,000–60,000/acre/year (TC planting material is the largest cost in year one: ₹1–1.5/plant × 45,000 plants = ₹45,000–67,500).

Net income from year two onwards (replanting cost drops to 20%): ₹1–1.5 lakh/acre/year.