Onion - Organic

Walla Walla Onion Conventional, Organic & Pelleted

Walla Walla Onion Conventional, Organic & Pelleted


125 days when spring sown. Long-day variety. One of our most popular sweet onions. When fall sown and allowed to overwinter, the round globes often attain a 5-6 inch diameter. For those of you in harsher climates, this onion can be spring sown. Start them early and transplant out as soon as the soil can be worked. The bulbs will be smaller, 2 1/2-3 inches across, but they'll have the same sweet flavor. Plan to use these beauties quickly, they're not meant for long-term storage.

   Open Pollinated
Approximately 200 seeds per gram.
  • ON554/S
  • 1 gram
  • $2.95

  • ON554/L
  • 1 gram Organic
  • $3.65

  • ON554/X
  • 250 seeds Pelleted
  • $4.95

  • ON554/P
  • 4 grams
  • $5.60

  • ON554/M
  • 4 grams Organic
  • $7.35

  • ON554/Y
  • 1000 seeds Pelleted
  • $8.95

  • ON554/B
  • 1 oz
  • $14.95

  • ON554/N
  • 1 oz Organic
  • $24.95

  • ON554C1
  • 1/4 lb
  • $30.35

  • ON554G1
  • 1/4 lb Organic
  • $72.40

  • ON554C2
  • 1 lb
  • $89.50

  • ON554G2
  • 1 lb Organic
  • $235.00
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Soil Temp for Germ.Days to EmergenceSeed DepthThin Plants ToSeed SpacingRow SpacingMin. Germ.Seed LifeSeeds per 1/2 gramFertilizer Needs
50-75°F6-161/8-1/2"2-7"2-4/inch12-24"75%1 year≈ 100Medium

Allium cepa

• 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

• 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: Neem oil 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

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.