Last edited on 2 Nov 2026. View history

rainbow Inca corn Rainbow Inca Corn

Zea mays

A variety of corn

How to sow rainbow Inca corn: Direct seed outdoors

Sun requirement for rainbow Inca corn: Plant in Full Sun

A sweet, dry corn selected by Alan Kapular in the mid-1970s from a cross of large white-seeded Peruvian corn, multicoloured native corns of the south-west US and heirloom sweetcorn. Cobs are about 20 cm long and the colour deepens as they ripen. It can be used as sweetcorn, a roasting corn or a dry corn.

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Rainbow inca corn facts

Lifespan

Annual living and reproducing in a single year or less

Growing rainbow Inca corn

  1. Dig compost into the bed 1 week before sowing
  2. Water regularly at sowing every week
  3. Thin the seedlings 2 weeks after sowing
  4. Weed between the plants 3 weeks after sowing every 2 weeks
  5. Mulch and hill soil round the stems 4 weeks after sowing
  6. Feed with a nitrogen fertiliser 5 weeks after sowing
  7. Pick the cobs at first harvest
  8. Pull out the stalks 2 weeks after first harvest

Plant rainbow Inca corn with

marjoram marjoram rice bean spaghetti squash spaghetti squash cowpea wine cap mushroom wine cap mushroom indian mustard

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Ecological requirements

Data from the FAO EcoCrop database for Zea mays L.

Family / Taxonomy Liliopsida
Commelinidae
Cyperales
Gramineae
Optimal temperature 18 - 33 °C
Absolute temperature 10 - 47 °C
Optimal rainfall 600 - 1200 mm/year
Absolute rainfall 400 - 1800 mm/year
Optimal soil pH 5.0 - 7.0
Absolute soil pH 4.5 - 8.5
Crop cycle 65 - 365 days
Max altitude 4000 m
Optimal soil depth medium (50-150 cm)
Optimal soil fertility high
Optimal soil salinity low (<4 dS/m)
Optimal light very bright

Licensed under CC-BY-4.0 .

Food and Agriculture Organization of the United Nations (2025) ECOCROP, the crop ecological requirements database. Version 1. https://data.apps.fao.org/catalog/dataset/ecocrop. Accessed through the CGIAR Climate Action Data Hub, https://cgiar-climate-data-hub.github.io/catalog/ecocrop_1/.

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