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Organic Non-GMO Onion Seeds::Organic Non-GMO Sweet Onions::Organic Walla Walla Sweet Onion

Organic Walla Walla Sweet Onion  Organic Non-GMO Walla Walla Sweet Onion - Reselection of the famous Walla Walla Spanish onion with increased uniformity and disease resistance. Light brown skin with white flesh that is very mild and sweet. Large round bulbs average 6” in diameter. The 2010 crop in our trials was unbelievable, holding out against disease far longer than other open-pollinated varieties. Plants are very upright and necks dry down nicely. A major improvement for this type of onion. Intermediate day onion. (Allium cepa.)

Days to maturity: 110 days
SKU Description Our price
2680A 1/64 OZ $2.75
2680B 1/8 OZ $6.30
2680C 1/2 OZ $16.00
2680D 2 OZ $50.00
2680E 1/2 LB $160.00
2680L001 1 LB $260.00

Unit Size
Quantity
   

Organic Sweet Onions Comparison Chart

Item Code Variety Name DTM Day Length Color Size Shape Storage Rating Standout Characteristics
2682 Gladstone 110 intermediate white 4-5" round moderate medium to large, mildly sweet, fresh market, very firm flesh
2674 Rossa di Milano 110 long-intermediate white/light pink skin 4" diameter heart good sweet flavor, good production, high shoulders
2680 Walla Walla 110 intermediate white/light brown skin 6" round poor mild and sweet, increased uniformity, upright plants, necks dry down well, disease resistant

Organic Onions - Growing Info

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Types of  Onions
Onions (Allium cepa) are cool season biennials, members of the Amaryllidaceae family, which includes garlic, leeks, chives and scallions. Onions started from seed store better than sets, but mature later. Bulbing onions are dependent on day length for bulb production; short-day onions produce bulbs when they receive 11-12 hours of daylight, long-day onions need 14-16 hours (latitudes north of 35Ί), and moderate day onions like Walla Walla and Gladstone fall in between these.
Soil and Nutrient Requirements
Onions prefer soils rich in organic matter that are well-drained. Optimal pH is 6.2-6.8. They cannot tolerate acid soils, especially in early stages. 80 lbs/A nitrogen is recommended. Sidedress 4-5 weeks after planting. High levels of sulfur in the soil will increase pungency. Best results come from selecting a bed with the least weed pressure possible.
Position
Full sun. Onions are very sensitive to day length and shade will dramatically slow growth.
Seeding Depth
1/8-1/4”
Seeding Rate
20 seeds/ft
Plant Spacing
Medium size onions 3-4”, for large onions 4-6”, for sweet onions 4”
Row Spacing
18-30”
When to Sow
Days to maturity are from direct seeding, subtract 1-2 weeks if transplanting. Direct seed onions as soon as soil can be worked or start transplants 10-12 weeks before planting date. Sow thickly in flats or 1” cells, in singles, doubles or triples. When seedlings reach 5” trim to 1” to increase girth. Transplanting is recommended for short growing seasons and sweet onions. Optimal soil temperature for germination is 75-85°F.
Other Considerations
Onions compete poorly with weeds. Cultivate regularly to control weed pressure.
Frost Tolerant
Yes
Drought Tolerant
Uniform water supply is important for good bulb development.
Heat Tolerant
Choose heat tolerant varieties for extreme areas.
Seed Specs
6-8M seeds/oz (7M avg.), 95-125M seeds/lb (105M avg.). M=1,000, MM=1,000,000
Seed Coating / Pelleting Info
Some of the varieties we carry receive an organic film coating applied to the seed, which make the seed easier to see during planting.
Harvest
For fresh eating, onions can be harvested whenever they reach desired size. Storage onions can be harvested when tops dry up and flop over. Pull bulbs from ground and cure for 3-5 days in the field or bring into barn or greenhouse and cure for two weeks at 75-80°F and 80% relative humidity..
Storage
Cool slowly, and store at steady temperatures. Rapid cooling followed by a sudden warm period might break dormancy and cause onions to sprout. Optimal storage is at near freezing temperatures at 65-70% relative humidity.
Pest Info
  • Onion Thrips thrive in hot dry weather and can be discouraged by heavy rain or overhead irrigation. Lacewing larvae, pirate bugs and predatory thrips are natural predators.
  • Onion Maggots overwinter in the soil. They feed on the roots of young seedlings, causing wilting and sometimes seedling death. Crop rotation and beneficial nematodes can be helpful.
Disease Info
  • Botrytis leaf blight (Botrytis squamosa) develops as small lesions surrounded by a silvery-white “halo” that grow and eventually extend through the wall of the leaf. Infection by the more common Botrytis cinerea (gray mold fungus) is distinguished by smaller lesions that do not have a “halo” and do not penetrate the leaf. Die-back begins at the leaf tip and can result in premature death of the leaf prior to bulb maturity. The fungus persists as sclerotia in the soil and on crop residues. Protectant fungicides are applied in advance when cool, wet conditions are expected. 
  • Downy Mildew (Peronospora destructor) thrives in extended periods of cool, humid weather. Plant in a well drained area, avoid overhead irrigation, orient rows with prevailing winds and rotate crops.
  • Purple blotch (Alternaria porri and Alternaria alternata) appears as elongated purple lesions that turn silvery over time. Control measures are similar to those for botrytis blight and downy mildew. Yellow cooking onions are not as susceptible to purple blotch as are Spanish onions. Best prevention methods are to practice good sanitation -- never pile cull onions near onion fields -- and crop rotation with non-host plants.
  • Damping off (Pythium/Rhizoctonia) – Avoid excessive moisture.
  • White Rot (Sclerotium Cepivorum) – Destroy infected plants and rotate crops.
Seed Saving Instructions
Insect pollinated. Onions are biennials and generally will not make seed their first year. Store the bulbs in a cool dry place or protect for overwintering outside. In the spring, transplant bulbs outside about 6" apart in rows about 12" apart. Harvest seed heads when 1/2 of the pods are open and showing black seeds. Allow to dry and seeds will be easily shaken out. Use 1/8" screen to help with cleaning. Allium seeds will remain viable for 1-3 years.  



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