Mulberry (Shahtoot) Farming in the Gangetic Plains
Why grow mulberry (shahtoot) in the Gangetic Plains?
Mulberry (Morus spp.), locally called shahtoot, is well-suited to the Gangetic Plains: warm summers, mild winters and alluvial soils give consistent leaf growth and fruiting. Mulberry has multiple uses—fruit for market, fresh consumption, and leaves for sericulture. This guide focuses on practical, field-tested steps for smallholders and commercial growers.
Site and soil requirements
Select a site with:
- Deep, well-drained alluvial loam or sandy loam. Mulberry tolerates a range of soils but performs best where roots can penetrate freely.
- pH between 6.0 and 7.5. Slightly acidic to neutral soils are ideal; correct strongly acidic soils with lime after testing.
- Good sun exposure—full sun gives best leaf and fruit production.
- Protection from waterlogging—avoid low-lying spots that become waterlogged in monsoon.
Variety choice and planting material
Choose varieties adapted to your target market and use:
- Local high-yielding cultivars for fruit markets (taste, size, color).
- Leaf-producing varieties if you plan sericulture—choose those with high protein/biomass and known acceptance by silkworms.
Propagation methods:
- Stem cuttings (hardwood cuttings) are the simplest and most reliable for local varieties. Take 30–40 cm cuttings in dormant season and use a rooting medium with good moisture retention.
- Sucker division or rooted layers works for clonal propagation.
- Nursery grafts or seedling rootstocks are used where rootstock-scion combinations are needed.
Nursery practices
Raise uniform plants in polybags or beds for 4–6 months before field planting:
- Use a potting mix of soil, compost and sand (2:1:1) and apply a light dose of nitrogen at regular intervals.
- Harden plants by gradually reducing water 10–15 days before transplanting.
- Select healthy, 25–40 cm tall saplings with 3–5 nodes for transplanting.
Planting layout and spacing
Spacing depends on intended use:
- For fruit orchards: 4–6 m × 4–6 m (around 400–625 trees/ha) to allow canopy development and mechanisation of fruit harvest.
- For leaf production/sericulture: closer spacing 3–4 m × 1.5–2 m or hedgerow systems, depending on plucking frequency and management system.
Planting time: early monsoon (June–July) or at the onset of the rainy season is best for establishing roots; in irrigated fields you can plant in spring.
Land preparation and planting steps
- Plough and pluck weeds; make pits 45–60 cm wide and deep where soil is poor. Mix topsoil with 2–3 kg compost and 100–200 g of well-rotted farmyard manure.
- Plant seedlings at the same depth as in the nursery. Firm the soil around the rootball to remove air pockets and water immediately.
- Stake plants in windy sites and apply a protective dose of mulch (5–8 cm) to retain moisture and suppress weeds.
Irrigation and water management
Mulberry responds well to regular moisture:
- Young plants: keep consistently moist, irrigate every 5–7 days during dry spells until established (first 6–8 months).
- Mature plants: irrigation every 10–15 days in dry season; increase frequency during hot spells to maintain leaf quality.
- Use drip irrigation where possible to save water and improve fertilizer use efficiency—especially valuable for high-density or year-round leaf production.
Fertilization
Establish a fertiliser schedule based on soil test, but typical guidance:
- Younger trees: light N-rich dressing to encourage vegetative growth (e.g., split doses of nitrogen). Avoid over-application of nitrogen in fruiting trees close to harvest to prevent poor fruit quality.
- Mature orchards: apply balanced N-P-K annually—split into two or three doses aligned with cropping flushes (pre-monsoon and post-monsoon).
- Apply organic manures (compost or FYM) annually: 10–20 kg per tree where available to improve soil structure and moisture-holding capacity.
Pruning and training
Pruning shapes the tree for fruit yield and leaf quality:
- First year: select 3–4 scaffold branches and remove competing shoots to establish a strong framework.
- Annual pruning: light pruning after harvest to remove dead or crossing branches and to encourage new shoots. For leaf crops, prune to stimulate fresh, soft flushes at plucking intervals.
- Rejuvenation pruning: for old or neglected trees, hard pruning (to 0.5–1 m above ground) can stimulate vigorous regrowth—do this at season start and ensure good aftercare.
Pests, diseases and monitoring
Common issues in the Gangetic Plains include:
- Pests: leaf-eating caterpillars (cutworm, eri silkworm pests where rearing is practiced), aphids and mealybugs. Monitor weekly young shoots and underside of leaves.
- Diseases: powdery mildew and root rot in poorly drained soils. Maintain good air circulation and avoid waterlogging.
- Management: use cultural controls first—remove affected shoots, improve drainage, encourage natural predators. Apply targeted insecticides or fungicides based on field scouting and local extension advice; follow label rates and pre-harvest intervals.
Harvesting and post-harvest for fruit
Fruit harvesting:
- Mulberries ripen over a short window—plan daily picking during peak. Hand-pick gently to avoid bruising; collect in shallow trays to prevent crushing.
- Process or market immediately. Mulberries are highly perishable—cooling immediately (shade, evaporative cooling) extends shelf life slightly.
Post-harvest handling:
- Sort to remove damaged fruit. Pack in ventilated boxes with a single layer where possible.
- For value addition: consider making jams, syrups, frozen fruit, or selling to processors; this reduces post-harvest losses in remote markets.
Yield expectations and economics
Yields vary with variety, spacing and management:
- Young trees (2–3 years) will produce small quantities; commercial bearing typically starts in year 3–4.
- Under good management, mature fruit trees can produce usable harvests yearly; leaf systems for sericulture can be harvested multiple times a year depending on pruning and irrigation.
Estimate returns conservatively: base plans on local prices, input costs and realistic yields from nearby farms. Mulberry is resilient but market access and timely harvest determine profitability.
Step-by-step quick checklist
- Soil test and correct pH if needed.
- Choose variety based on market or leaf-use.
- Raise healthy saplings in nursery (4–6 months).
- Prepare land, apply compost to planting pits and plant at onset of rains.
- Install mulch and stakes; water regularly until establishment.
- Follow fertiliser schedule and use drip irrigation if possible.
- Prune annually and monitor pests weekly.
- Harvest fruit daily at peak ripeness; handle gently and market quickly.
Practical tips from growers
- Mulch aggressively in first two years to retain moisture and suppress weeds—saves labor and water.
- Intercrop short-duration legumes in first year to maintain soil cover and add nitrogen.
- Keep records of pruning dates, harvest volumes and pest outbreaks to refine your schedule season to season.
- Talk with local sericulture centres or fruit market agents to match variety choice to demand.
Final note
Mulberry farming in the Gangetic Plains is practical and adaptable. Success depends on choosing the right variety for your market, steady water management, timely pruning and active pest monitoring. Start small, learn local responses, then scale up with improved irrigation and value-added options to stabilise returns.