Red Spring Onion is a long-season cultivar of Allium cepa that takes approximately 250 days from direct seeding to reach harvest maturity. This variety thrives in well-draining soil with a pH between 6.0 and 7.0, requiring consistent moisture and attentive spacing of just 2 inches between plants in rows set 12 inches apart. Red Spring Onions demand high water throughout their growing season to develop properly, making them a commitment for gardeners who can provide regular irrigation and care.
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Growing Red Spring Onion demands patience and attention to moisture management, but the reward is a bulb that develops its characteristic color and flavor over the full 250-day season. These onions are photoperiodic, meaning they respond to day length as they regulate their growth stages, so timing and your specific location matter significantly. The extended growing period allows the bulbs to mature fully, developing the protective papery outer layers that make them excellent keepers when properly cured and stored.
Red Spring Onions can be harvested at the pencil-size stage for fresh eating as tender scallions, or left to mature into full bulbs for storage and cooking. When harvested young, they offer a milder onion flavor suitable for fresh applications like salads and garnishes. Allowing them to reach full maturity creates storage onions with better keeping qualities, making them suitable for long-term pantry storage and use in cooked dishes throughout the season.
No timeline data available yet for this variety.
Sow up to 10-12 seeds in a 4-6 inch pot for transplanting. If seedling tops reach over 5 inches before transplant time, cut them back to 3 inches to encourage stronger transplants.
When planting out seedlings, carefully separate them and place each in a shallow trench, spacing them 2 inches apart with rows 12 inches apart. Fill the trench around the seedlings and water in thoroughly.
Direct sow seeds in place, thinning to the strongest plants when seedlings reach 4-5 inches tall. Days to maturity are calculated from the date of direct seeding.
For scallion-style harvest at the pencil-size stage or larger, wash and trim the roots. For full bulb maturity, wait until about half the tops have naturally fallen over, then push the remainder over and wait approximately one week before harvesting. Dig carefully to avoid bruising the bulbs.
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