This is a replacement for the variety Copra which many gardeners loved and grew year after year but it is no longer available for us to offer. Patterson hits the same marks of a great onion like Copra, except it is a bit larger and more uniform with copper colored skin and the same ability to store extremely well.
Germination: 5-10 days
Germination Temperature: Optimum soil temperatures 65-85 degrees F. Cooler soil temperatures increase germination time.
Seed Sowing Depth: ¼” deep
Outside Sowing: Early to mid-spring when soil temperature reaches at least 55 degrees F. Sow 1-3 seeds per inch, thin to 2-6” apart. The larger the bulb size the more space.
Starting Indoors: 8-10 weeks before last frost. Sow in flats/cells/pots ¼ ” deep, ¼-½ ” apart. Provide 65-75 degrees F soil temperatures. Transplant seedlings out mid/late spring, 2-6” apart. Fertilize the seedlings every 7-10 days with a liquid or water soluble fertilizer (diluted to ¼ of suggested measurement).
How much does a packet plant: 15-20 foot single row
Harvest: Stop watering a week before harvesting. Pull out when tops fall over and skin develops. Cure them by drying them until the neck is dry, out of direct sunlight, in a warm area, and in single layer so air can circulate around them.
Tips: Plant into fertile soil with lots of organic matter and adequate water, 1” per week for optimum growth.