Growing Maize in Bihar

Updated 2026-07-13 · Region guide

Bihar sits in the Middle Gangetic Plains with humid subtropical and fertile alluvium. Fertile Gangetic plains — a big rice, wheat, maize and potato state. Here's how maize — a Kharif & Rabi crop — fits, and how to grow it well here.

Is Bihar good for growing maize?

When to sow maize in Bihar

Sow in Rabi Oct–Nov (high-yield); Kharif Jun and harvest around Rabi Mar–Apr. The crop takes about 90–110 days. In Bihar's humid subtropical, the window matters more than anything else you do: ~1200 mm rainfall and canal + tubewell + monsoon mean a late Kharif & Rabi sowing runs maize into the wrong weather at its most sensitive stage.

Where maize actually grows in Bihar

The Kosi–Seemanchal belt — Katihar, Purnia, Araria, Kishanganj, Madhepura, Saharsa, Supaul, Khagaria, Begusarai, Samastipur and Bhagalpur (Naugachia). This is India's most productive maize land: rabi (winter) maize on light Kosi sandy loam and diara land under tubewell and diesel-pump irrigation regularly yields far above the national average and above any kharif belt in the south. The crop is rabi precisely because the same land floods in kharif.

Where it is sold: Bihar repealed its APMC Act in 2006, so there are no regulated mandis and no committee-set rate — you sell to private traders and aggregators. In practice the belt trades through Gulabbagh in Purnia, eastern India's largest maize hub, whose rate effectively is the price. Grain moves from there to poultry feed buyers in West Bengal and Assam, to starch, and increasingly to ethanol. With no APMC and negligible MSP procurement, you are a straight price-taker, and Bihar maize also carries a moisture and aflatoxin reputation that costs it a standing discount against Karnataka grain.

The local risk to plan for: The whole belt harvests inside a three-to-four-week window in April and May, exactly when pre-monsoon showers arrive — and there are almost no dryers. Wet grain plus a heap plus heat is how aflatoxin starts, and it is why Bihar's world-class yields still fetch a discounted rate. With no APMC and no procurement floor, there is nothing under the price when the whole Kosi belt arrives at Gulabbagh at once.

Best maize varieties for Bihar

Grown in Bihar:

• Shaktiman-1 and Shaktiman-2 — quality protein maize hybrids bred in Bihar (RAU Pusa/Dholi)
• Shaktiman-5 — a later release in the same Bihar QPM series
• Rajendra Hybrid Makka-2 — from RPCAU Pusa, suited to the state's rabi window
• The Kosi rabi belt runs overwhelmingly on private long-duration single-cross hybrids, which is where the high yields come from — but never save seed from a single-cross hybrid. The second generation collapses, and that failure gets misdiagnosed as bad weather every year

Confirm the variety is notified for Bihar — on fertile alluvium under canal + tubewell + monsoon, a variety bred for a different zone will underperform whatever the seed packet claims. Your Bihar KVK or agriculture officer holds the current shortlist.

Typical yield & price

Typical yield here is around 25–35 quintal/acre (Rabi). The government MSP is ₹2,090/quintal; local mandi rates vary, so check YieldAI for today's live Bihar price.

Common problems in Bihar

The pests and diseases to scout for:

• Fall armyworm — mainly a spring and kharif maize problem here; the rabi crop largely escapes it, which is one more reason the Kosi belt's winter maize does so well
• Maydis leaf blight — small, oblong, straw-coloured lesions spreading between the veins; the main foliar disease of Bihar's rabi and spring maize
• Post-flowering stalk rot — stalks go hollow and lodge after flowering, usually following a moisture swing. On light Kosi sand it follows a missed irrigation
• Storage weevil and aflatoxin — the direct result of the wet April harvest. This is Bihar maize's single biggest value leak

humid subtropical conditions shape which of these bite hardest each season — scout early and act while a problem is small. YieldAI can identify a pest or disease from a photo of your crop.

Key practices

• Dry to 14% before selling. Shell, spread thin on a tarpaulin, and do not heap wet grain even overnight — heaped wet maize in April heat is exactly how aflatoxin starts, and the discount it earns you is permanent
• Split your nitrogen across more applications than you would on heavy soil. Kosi sandy loam leaches, and a single large dose mostly washes past the roots
• Because there is no APMC, get the Gulabbagh rate before you talk to a doorstep aggregator. A farmer who knows today's hub rate is negotiating; one who does not is accepting
• Buy fresh hybrid seed each rabi. Saving seed from last year's single-cross hybrid is the most common and most expensive mistake in this belt