WALLA WALLA
Product Description:
Tips for overwintering: Sow seed at the beginning of August. Once they are large enough, around mid-October, transplant into the garden. You can harvest green onions until April. In May they will begin to bulb and will be ready to harvest as dried down bulbs by mid to late-June.
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Key Features:
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Key Features:
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Customer Reviews
Walla Walla seeds arrived quickly and in great condition. I waited too long to get them in the ground this season so will plan in Spring. Territorial is a great source because the seeds are known to do well in our Pacific Northwest area.
I've grown onions from various sources for years, and Territorial Seeds Walla Walla strain is by far the very best product available. I highly recommend this product for your home garden.
Bill C.
I ordered the pelleted seed to give overwintering Walla Walla's a try. I've not done that before. Some seeds have sprouted already after planting them 8 days ago. The pelleted seed makes it a lot easier to handle thus getting them into my starter soil. I recommend the pelleted seed wholeheartedly, and look forward to the results mid 2026!
We had a off and on warm and cold February that caused some bolting of the onions I overwintered but we just ate those as they appeared. I just brought in the crop and am happy to have some nice big onions.
| Soil Temp for Germ | 50–75°F |
| Seed Depth | ⅛–½" |
| Seed Spacing | 2–4/inch |
| Days to Emergence | 6–16 |
| Thin Plants to | 2–7" |
| Row Spacing | 12–24" |
| Fertilizer Needs | Medium |
| Minimum Germination | 75% |
| Seeds per Gram | ≈ 200 |
| Seed Life | 1 year |
Allium cepa Days to maturity are calculated from date of direct seeding.
Culture
• Onions are photoperiodic plants — they regulate their stages of growth by day length
• Onions will make top growth until the critical light duration is reached, then bulbing begins
• The amount of growth and development prior to bulbing will determine the bulb size
• Long-day varieties do well in northern states where summertime day length is between 14-16 hours
• Short-day varieties do well in southern states and bulb when day length is 10-12 hours; they won't get very large in northern states
• Dividing line between short-day and long-day varieties is generally accepted as 36° latitude, roughly along the Kansas/Oklahoma border
• Day-neutral and intermediate-day varieties start bulbing when day length is 12-14 hours; can be successfully grown anywhere
• Onions prefer light, sandy, loamy soils
• Apply 1/4-1/2 cup of TSC's Complete fertilizer per 5 row feet, 1-2 inches below transplant or seed
Direct Sowing
• Thin to the strongest plant when 4-5 inches
Transplanting
• Sow up to 10-12 seeds in a 4-6 inch pot
• If tops reach over 5 inches before transplant, cut to 3 inches
• When planting out carefully separate the seedlings and place in a shallow trench
• Fill trench around seedlings and water in well
Insects & Diseases
• Common insects: Onion thrips and maggots
• Insect control: Pyrethrin or Predatory Nematodes
• Common diseases: Fusarium basal rot, pink root
• Disease prevention: 5-7 year crop rotation
Harvest & Storage
• For scallions: harvest when pencil size or larger, wash and trim roots, store in a bag at 36°F and 95% relative humidity
• As bulbs approach maturity, withhold water so protective paper can form
• After about half the tops have fallen, push over the remainder; wait about 1 week then harvest
• Cure in a warm (75-80°F), shaded, well-ventilated location until outer skin and necks are dry, then trim tops, leaving one inch above the bulb
• Store in a cool, dry, well-ventilated area
• Check occasionally and immediately remove any sprouting or rotting onions
KEY TO ONION DISEASE RESISTANCE AND TOLERANCE
HR indicates high resistance.
IR indicates intermediate resistance.
F | Fusarium Wilt
FBR | Fusarium Basal Rot
PR | Pink Root
What is pelleted seed?
Seed that has been coated with a clay-based material to form a larger, round shape. This makes planting by hand or mechanical seeder easier and allows for more controlled sowing of small seeds such as carrots or lettuce. All pelleted seed has a National Organic Program (NOP) approved coating.
For best results, store pelleted seed in an air-tight container and use within one season.
What is seed tape?
Seed tapes are perfectly straight rows of precisely spaced crops. No more having to thin seedlings! This biodegradable tape will plant a row 5 meters (16 feet, 5 inches) long. Simply lay it in a furrow and cover with a light layer of sifted compost or soil, water and wait. Save yourself a heap of planting time with these popular vegetable and herb staples.
