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ONIONS: PLANT SEEDS, SETS, OR
PLANTS?
BY
I do not grow onions so most all my information comes from reading and talking to those who do. When I began looking I found that the University of Nebraska-Lincoln Extension Service does not have a NebGuide on growing onions, so decided to pull together information from a number of local sources and a catalog I got in the mail. I found that when growing onions the first question you must answer is “How am I going to use these onions?”
The next question then is “Should I plant seeds, sets, or plants?”
ONION SEEDS “All onion types can be started from seed. Onion seed can be grown indoors about 4-8 weeks before transplanting or seed can also be sown directly into the garden as soon as the soil can be worked. Follow the packet directions for planting onion seed.” (1) ONION SETS “Onion sets are purchased as a red, white, or yellow onion. (Most of these are Ebenezer cultivars and good keepers.) They are small, dormant onion bulbs that are ready to be planted in your garden. Plant these in early spring, giving them ample time to grow. Onion sets are grown for young green table onions or harvesting later for a dry ‘keeping’ onion. When planting onion sets, divide them into two sizes. Plant the largest sets together in order to have early green onions leaving smaller sets for dry cooking onions. Plant the sets 1 to 2 inches apart and 2 to 3 inches deep. When you harvest your table onions, pull every other plant allowing more space for the development of the remaining onions for cooking and storing.” (1) ONION PLANTS “Onion plants may be purchased by name variety. Sweeter and milder onions do not have a long storage life. The stronger the taste of your large onion, the better it will keep and it will not bruise so easily. After purchasing onion plants, plant them as soon as possible, since they are live plants. The onion will live approximately three weeks off the bulb and will shoot new roots after planting. Onion plants should be planted approximately 1 inch deep with 4 inch spacing if you wish to harvest the onions during the growing season. Pull every other one as a table onion, leaving space for growth of the larger remaining onions. Plants may be set out 4-6 weeks prior to the average spring freeze. Onion plants are hardy and can withstand temperatures of 20 degrees F.” (1) PLANTING
“The nature of the onion is to grow tops in cool weather and form
bulbs in warm weather. Those varieties grown in the north require 14 to
16 hours of daylight. The reason we plant some our varieties from plants
rather than from sets is because the bulb will not get large enough
unless it is already half grown and will mature into a big onion by the
time we get to late summer and cooler weather of fall.
Good sized transplants planted early will make a larger bulb than
the normal onion set. SHORT
In the literature and on signs in the
“Short
INTERMEDIATE In a future article this fall I will deal with the harvesting and storing of onions. Resources: 1. “Onions, Potatoes” and Sweet Potatoes: Planting,
Growing, and Harvesting”.
Free brochure from 2. “Onions” Free handout from Campbells Nursery and 3. “Onions” pm1889 Revised June 2009 Prepared by 4. Brown’s Omaha Plant Farms, Inc. Page 2. |