Plant PulseWhen to plant Corn in Mid Country
When to plant Corn in Mid Country. Stored windows: September–October; April. Ranges from different sources are not averaged.
Unverified — based on Field Crops – Maize – Sinhala, Department of Agriculture Sri Lanka, Sinhala page, accessed 2026-10-20: https://doa.gov.lk/field-crops-maize-si/; confirm for your microclimate.
Stored planting windows
September–October
Direct sow
Using 105–115 stored days. Plant in Sep, first harvest about 105–115 days later (around December–January). Plant in Oct, first harvest around January–February. Calculated from the stored day count and the planting month. It is not a separate harvest calendar. Farmer field experience. Using 90–110 stored days. Plant in Sep, first harvest about 90–110 days later (around December–January). Plant in Oct, first harvest around January–February. Calculated from the stored day count and the planting month. It is not a separate harvest calendar.
Sinhala maize page: under rain, the end of September or the beginning of October, more suitable in the dry and intermediate zones. This mid-country sample is not named on the page. The months are stored because the page says intermediate zones, and the note keeps that limit.
Unverified — based on Field Crops – Maize – Sinhala, Department of Agriculture Sri Lanka, accessed 2026-10-20: https://doa.gov.lk/field-crops-maize-si/; confirm for your microclimate.
April
Direct sow
Using 105–115 stored days. Plant in Apr, first harvest about 105–115 days later (around July–August). Calculated from the stored day count and the planting month. It is not a separate harvest calendar. Farmer field experience. Using 90–110 stored days. Plant in Apr, first harvest about 90–110 days later (around July–August). Calculated from the stored day count and the planting month. It is not a separate harvest calendar.
Sinhala maize page: Yala at the beginning of April, for the dry and intermediate zones named in the same section.
Unverified — based on Field Crops – Maize – Sinhala, Department of Agriculture Sri Lanka, accessed 2026-10-20: https://doa.gov.lk/field-crops-maize-si/; confirm for your microclimate.
From farmer field experience
Based on hands-on growing experience from Sri Lankan farmers. Not yet verified against official sources.
September–November
Direct sow
Using 105–115 stored days. Plant in Sep, first harvest about 105–115 days later (around December–January). Plant in Nov, first harvest around February–March. Calculated from the stored day count and the planting month. It is not a separate harvest calendar. Farmer field experience. Using 90–110 stored days. Plant in Sep, first harvest about 90–110 days later (around December–January). Plant in Nov, first harvest around February–March. Calculated from the stored day count and the planting month. It is not a separate harvest calendar.
Farmer field notenoted Oct 2026
Mid Country, September–November.
Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
March–April
Direct sow
Using 105–115 stored days. Plant in Mar, first harvest about 105–115 days later (around June–July). Plant in Apr, first harvest around July–August. Calculated from the stored day count and the planting month. It is not a separate harvest calendar. Farmer field experience. Using 90–110 stored days. Plant in Mar, first harvest about 90–110 days later (around June–July). Plant in Apr, first harvest around July–August. Calculated from the stored day count and the planting month. It is not a separate harvest calendar.
Farmer field notenoted Oct 2026
Mid Country, March–April.
Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Season ranges
Two or more season ranges are stored. They are not joined. A month is marked only when it falls inside a stored range.
- Yala is stored from more than one source, and the months do not match. Yala (FAO) is Mar–Aug. Yala (National Drought Plan) is Apr–Sep. Both ranges are shown. They are not averaged.
- Maha is stored from more than one source, and the months do not match. Maha (FAO) is Sep–Feb. Maha (National Drought Plan) is Oct–Mar. Both ranges are shown. They are not averaged.
Agricultural seasons
- Yala (FAO): Mar–Aug (Agricultural)
Improvement of plant nutrient management for better farmer livelihood, food security and environment in Sri Lanka, J.D.H. Wijewardena, Department of Agriculture, hosted by FAO, accessed 2026-10-20: https://www.fao.org/4/ag120e/AG120E12.htm
- Maha (FAO): Sep–Feb (Agricultural)
Improvement of plant nutrient management for better farmer livelihood, food security and environment in Sri Lanka, J.D.H. Wijewardena, Department of Agriculture, hosted by FAO, accessed 2026-10-20: https://www.fao.org/4/ag120e/AG120E12.htm
- Yala (National Drought Plan): Apr–Sep (Agricultural)
National Drought Plan for Sri Lanka, Ministry of Environment, September 2020, accessed 2026-10-20: https://www.unccd.int/sites/default/files/country_profile_documents/NDP%20of%20Sri%20Lanka-Final%20Report-Sept%202020.pdf
- Maha (National Drought Plan): Oct–Mar (Agricultural)
National Drought Plan for Sri Lanka, Ministry of Environment, September 2020, accessed 2026-10-20: https://www.unccd.int/sites/default/files/country_profile_documents/NDP%20of%20Sri%20Lanka-Final%20Report-Sept%202020.pdf
Methodology
- Where do these planting months come from?
- Each range is a stored planting window for this crop and climate. A month that is not listed has no stored window. It is not a recommendation to skip planting.
- Why can the same season appear more than once?
- When two sources give different months for the same season, both ranges are listed. They are not averaged, and the gap between them is not filled in.
- How are grower notes different from official windows?
- Farmer field notes are labelled Farmer field experience, with the month they were noted. They are not official department windows, and they are not yet verified against official sources.