Long-day and Short-day Onions

When you are shopping for onion varieties to plant in your vegetable garden, you will often see them listed as either short-day onions or long-day onions. Which ones to grow depend upon where you live.

Most onion varieties begin to form a bulb when the temperature and the number of daylight hours reach certain levels. Varieties listed as short-day onions bulb up when the day length is between 12 and 14 hours. Long-day onions, on the other hand, begin to form a bulb when the day length is between 14 and 16 hours.

Northern gardeners should plant long-day onions. In the North, daylight length varies greatly as you get farther and father away from the equator. Winter days are very short, but summer days are long. Long-day onions will have a chance to produce lots of top growth (hence produce bigger bulbs) before the day length triggers bulbing. If short-day onions were grown in the North, the onions would bulb up too early and they would be small by comparison.

Southern gardeners should plant short-day onions. In the South, there is much less variation in day length between seasons than up North. If long-day onions were planted in the South, they may not experience enough day length to trigger the bulbing process.

Related Articles

     

The Art of Gardening

The Art of Gardening "Beautifully illustrated and practical Are you ready to take your garden from good to great? Learn how to build your soil...and more!

 

Greenhouse Plans

What's New?

Discover how to easily build an attractive and affordable greenhouse that will grow anything in any conditions. Also, building your own greenhouse just makes economical sense. You can build a greenhouse at just a fraction of the cost of buying a pre-built one. Most pre-built greenhouse you buy need to be assembled anyway, you are really just paying hugely inflated prices for the material.

Click Here!

 

Great Books

Worms Eat My Garbage

The book that started a backyard worm revolution! With more than 150,000 copies sold, this is the bestselling and remains the definitive guide to vermicomposting--a process using red worms to recycle human food waste into nutrient-rich fertilizer for plants. Author Mary Appelhof provides complete illustrated instructions on setting up and maintaining small-scale worm composting systems. Read More...

Chelsea Green Publishing - the leading publisher of sustainable living books since 1985.

 

Plant Search:
 

Organic Gardening
Tip of the Day


Natural Resources

Living With Bugs

organic herb farm
The Natural Handyman

Current Moon Phase


I am a Food RENEGADE!