Hi-keeper is a long-storage onion bred for serious keepers who want their harvest to last deep into winter. Maturing in 230 days, this frost-hardy cultivar develops reliable bulbs that cure down to a papery, protective skin and store exceptionally well when given the right post-harvest conditions. The name says it all: if you want onions that stick around, this is the variety to plant. It thrives in soil with a pH between 6.0 and 7.0 and needs consistent moisture throughout the growing season, making it a dependable choice for gardeners who plan ahead.
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The 230-day maturity tells you this is a serious storage onion, not a quick-harvest type. Hi-keeper develops the dense, protective papery layers that make onions last months in cool storage, which means you're harvesting bulbs engineered to stay firm and flavorful well past the season's end. The frost-hardy nature gives you flexibility in cooler climates, and the tight 2-inch spacing lets you pack more plants into the bed if you're maximizing yield.
Hi-keeper onions are grown specifically for long-term storage and cooking use. Their extended maturity and superior curing ability make them the choice for gardeners building a winter pantry. Once cured and stored properly, they provide fresh onions for cooking, soup, caramelizing, and raw applications well into late winter and early spring when fresh vegetables are scarce.
No timeline data available yet for this variety.
Sow seeds indoors in pots, placing up to 10-12 seeds in a 4-6 inch pot. Germinate at temperatures between 50-70°F. If seedling tops reach over 5 inches before transplanting, cut them back to 3 inches to promote stronger root development. Plan your indoor start so seedlings are ready to transplant when soil can be worked in spring.
When transplanting, carefully separate seedlings and place them in a shallow trench in the garden bed. Space plants 2 inches apart in rows 12 inches apart. Fill the trench around the seedlings and water in well to establish good soil contact.
Direct sow seeds into prepared garden beds when soil can be worked in spring. Sow and thin to the strongest plants when they reach 4-5 inches tall, leaving 2 inches between plants.
Harvest Hi-keeper onions when about half the tops have naturally fallen over, which typically occurs around the 230-day maturity mark. Push over any remaining tops that haven't fallen naturally, then wait about one week before pulling the bulbs. Harvest in dry weather, as onions collected in wet conditions do not cure well and are prone to rot. Loosen the soil around bulbs gently with a fork before harvesting to ease extraction and encourage drying. Once pulled, allow bulbs to dry in a warm, airy location for several weeks so the papery skin can fully develop and protect the bulb inside.
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