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Growing Star Anise in the Rice Bowl of India

Practical, field-tested guidance for establishing and managing star anise (Illicium verum) plantations in Assam and comparable eastern Indian zones, from nursery to market.

Ranjeet Natarajan
Ranjeet Natarajan August 9, 2026 7 min read 1,275 words
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Growing Star Anise in the Rice Bowl of India

Introduction

Star anise (Illicium verum) is a spice tree grown for its aromatic star-shaped fruit used in cooking, perfumery and pharmaceuticals. The warm-humid climates and lateritic alluvial soils of Assam—the Rice Bowl of India—and neighbouring eastern states can be suitable for smallholder and plantation-scale production when growers match site selection, nursery practices and crop management to the tree’s needs.

Where it fits: climate and soil

Star anise is a subtropical to tropical tree. Key environmental factors:

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  • Temperature: prefers warm sites without severe frost; best growth in mean annual temperatures broadly between 15–30°C. Young plants are sensitive to cold spells.
  • Rainfall and humidity: likes humid conditions and well-distributed rainfall; supplemental irrigation useful in dry months to maintain steady growth.
  • Altitude: performs well at low to moderate altitudes common in Assam plains and foothills.
  • Soil: favors deep, well-drained soils with good organic matter. Slightly acidic to neutral pH is acceptable; avoid waterlogged clay pans. Light to medium loams with good drainage are ideal.

Varieties and plant material

Commercial production uses Illicium verum (Chinese star anise). In India, growers often source planting material from nurseries that supply locally adapted clones and seed sources. Practical options:

  • Seed-raised plants: common and inexpensive; genetic variability may affect yield and fruit quality.
  • Vegetatively propagated material: grafted or rooted cuttings from superior mother trees give more uniform orchards and predictable quality.

When buying material pick vigorous, disease-free stock from trusted suppliers and, where possible, select mother trees known for larger, well-formed fruits.

Nursery practices and propagation

Establish a nursery for a reliable supply of uniform seedlings:

  • Seed treatment: clean seeds and sow promptly. Pre-germination treatments (soaking briefly in water) can improve germination; maintain a moist but not waterlogged medium.
  • Media: use a mix of topsoil, compost and sand or cocopeat for good drainage and aeration. Keep seedlings in partial shade.
  • Hardening: gradually reduce shade and watering over 3–4 weeks before transplanting to acclimatise seedlings to field conditions.
  • Time to transplant: seedlings are usually ready for field planting at 8–12 months depending on growth and nursery care.

Land preparation and planting layout

Prepare the land during the dry season. Steps and spacing:

  • Clear competing weeds and level the field for uniform irrigation.
  • Incorporate well-rotted farmyard manure or compost at 10–20 tonnes per hectare depending on soil fertility; this improves structure and provides slow nutrient release.
  • Planting distance: common spacings are 5–7 m between trees in both directions for full-size trees; denser planting (e.g., 4 m) can be used with later thinning or pruning to manage canopy.
  • Pits: dig pits about 50–60 cm wide and deep; fill with topsoil mixed with compost. Allow pits to settle a few days before planting or plant immediately with proper backfilling.

Planting and early care

  • Timing: plant at the start of the rainy season to reduce irrigation needs and support establishment.
  • Planting depth: place root ball at the same depth as in the nursery; avoid burying the stem.
  • Mulching: apply 5–10 cm of organic mulch (straw, sugarcane trash, leaf litter) around the base to conserve moisture and build soil organic matter.
  • Staking: stake young plants in windy sites to prevent root disturbance.
  • Irrigation: keep soil moist but not waterlogged during establishment; frequency depends on local rainfall and soil type.

Nutrition and fertiliser schedule

Star anise benefits from balanced nutrition. Use a practical fertiliser programme adapted to soil tests:

  • Baseline: apply organic manure annually (5–10 kg per tree) to support soil life.
  • NPK: a balanced fertiliser (e.g., 10-10-10) can be applied in split doses—early vegetative season and mid-season. Young trees need lighter applications, increased as the tree matures.
  • Micronutrients: monitor for deficiencies (chlorosis, poor growth). Zinc and boron can be important in fruit setting—apply only if a deficiency is suspected or confirmed by testing.
  • Foliar feeds: light foliar sprays of urea or seaweed extracts can help during flushes and flowering, but don’t substitute for soil health management.

Pruning and canopy management

Pruning shapes the tree, encourages branching and improves light penetration for flowering and fruiting:

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  • Initial shaping: form a strong framework in the first 2–3 years, keeping 3–4 main scaffold branches.
  • Maintenance pruning: remove dead, crossing or shaded branches annually after harvest or in the dry season.
  • Height control: prune tops if trees become too tall for easy harvest; keep canopy accessible.

Pest and disease management

Star anise is generally hardy, but growers should monitor for common problems and use integrated pest management (IPM):

  • Insects: shoot borers, caterpillars and sap-sucking insects may attack. Regular scouting, hand removal of larvae, neem applications and selective biopesticides help keep populations low.
  • Fungal issues: leaf spots and root rots can occur in poorly drained soils. Maintain drainage, avoid excessive watering and remove infected material. Use copper-based fungicides only when necessary.
  • Sanitation: remove fallen, diseased fruits and leaves to reduce inoculum and pest breeding sites.

Flowering, pollination and fruiting

Star anise flowers on new growth. The trees may take 4–6 years to start bearing commercially useful crops when grown from seed; vegetative plants may bear earlier. Key points:

  • Flowers are insect-pollinated; maintain pollinator-friendly practices and avoid broad-spectrum insecticides during bloom.
  • Fruit development requires consistent moisture and balanced nutrition; sudden drought or nutrient stress can reduce fruit set.

Harvesting and quality

Fruits are harvested when they turn brownish and woody, still retaining their characteristic star shape. Practical harvesting tips:

  • Harvest by hand or with pruning shears to avoid damage.
  • Timing: pick when most fruits are mature on the tree; staggered maturity may require several rounds of harvest.
  • Drying: spread fruits in thin layers in shaded, airy drying yards or tunnels. Avoid direct hot sun that can bleach essential oils. Proper drying preserves flavour and reduces mould risk.
  • Sorting and grading: remove broken or discoloured fruits; grade by size and appearance for different market channels.

Postharvest handling and storage

  • Store dried star anise in cool, dry, pest-free conditions in airtight containers or jute sacks lined with polyethylene to limit moisture uptake.
  • Keep away from strong odours; the spice absorbs and transfers aromas.
  • Maintain low moisture content (well-dried) to reduce fungal risk and retain essential oil quality.

Markets and value addition

Markets include local spice traders, processors for confectionery, broths and essential oil extraction. Consider on-farm value addition:

  • Grading and packaging for retail or institutional buyers.
  • Supplying dried fruit to oil processors—coordinate with local processors to meet quality specs (moisture, cleanliness).
  • Organic production: can attract premium prices where certification and supply chains exist, but requires consistent records and pest management adjustments.

Practical risks and farm-level economics

Star anise is a medium-term perennial crop with establishment costs for land, planting material and labour. Consider these practical points:

  • Time to payback: expect several years before steady yields—plan rotation or intercrops in early years to use space and earn income.
  • Intercropping: short-term crops under young trees (e.g., shade-tolerant vegetables, ginger) can provide returns and reduce risks if spacing and root competition are managed.
  • Quality over quantity: essential oil content and fruit integrity fetch better prices than bulk, ungraded product.

Local adaptation tips for the Rice Bowl (Assam)

  • Choose well-drained sites on raised beds or gentle slopes to avoid seasonal waterlogging in heavy monsoon soils.
  • Use locally available organic inputs—compost, cow manure—to build soil carbon and reduce fertiliser costs.
  • Partner with local spice traders and processors in Guwahati and tea-belt towns to understand quality needs and off-take options early.

Conclusion

Star anise can be a rewarding crop in Assam-like environments when growers focus on correct site selection, good nursery material, balanced nutrition, careful harvesting and postharvest handling. Early planning for markets, and integrating intercrops or value-added processing, helps manage the multi-year investment and improves returns. Begin small, learn local varietal behaviour and scale up once you have consistent quality and buyers.

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Ranjeet Natarajan
Ranjeet Natarajan

Contributing writer at Agriculture Novel — telling the stories that sustain us.

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