Course Content
Learn Vegetable and Spice Crop Production with Rahul

Climate

  • It is grown best where the climate is mild without the extreme heat or cold or excessive rainfall.
  • Mild climate without extreme of high or low temperature.
  • At early stage, plant can tolerate frost.
  • temp for seed germination 20-25oC.
  • Low temp and short photoperiod are required for vegetative growth, relatively higher temp and long photoperiod for bulb development.
  • Lower temperature (1 – 21oC) and short photoperiod promote vegetative growth while higher temp. (15 – 25oC) and long photoperiod promotes bulb development.
  • Opt temp for veget growth is 13oC-21oC and bulb devt opt temp is 15oC-250
  • Adjusting planting time, can be grown from Terai to High Hill
  • Onions start bulb formation when the day length is of the proper duration and different varieties of onions require different day lengths to initiate bulbing.
  • High temperatures and low humidity are advantageous during bulbing and curing.

 

Soil

  • It can be grown on various types of soil, but it grows best in light soil which may be sandy loam or silty loam.
  • Heavy or clay soil should be avoided as they do not permit proper bulb development.
  • Deep, friable sandy loam soil with high OM is best
  • It is sensitive to acidity or alkalinity . pH 5.8-6.5 .
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