Calibra Organic (F1) Onion Seed
Quick Facts
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Latin Name
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Allium cepa
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Days To Maturity
Days To Maturity
Average number of days from seeding date to harvest, within a specific crop group. If a transplanted crop: average number of days from transplant date. Not sure if crop is direct-seeded or transplanted? Check the Growing Information box for details. If crop can be both direct-seeded or transplanted, days to maturity refers to direct seeding. Days to maturity for all flowers and herbs is calculated from seeding date.
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110 Days
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Hybrid Status
Hybrid Status
Hybrid: The offspring of a cross between two or more distinct parent lines, usually of same species, and selected for improved traits.
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Open-pollinated: A non-hybrid variety that can reproduce itself in kind, demonstrating relatively stable traits from one generation to the next. -
Hybrid (F1)
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Product Features
Product Features
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Organic Seeds, Plants, and Supplies
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Plants, or seeds harvested from plants, that have been grown without synthetic fertilizers or pesticides, strictly adhering to the USDA's National Organic Standards Board (NOSB) organic gardening practices are designated as Organic.
Supplies that meet the USDA's National Organic Program (NOP) rules according to a third-party authority such as OMRI, WSDA, and/or a local authority such as MOFGA or NOFA.
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Calibra Organic (F1) Onion Seed
Storage onion for intermediate latitudes.
This "long intermediate" onion forms large bulbs farther south than our other hard storage onions. Robust, upright green tops for improved thrips resistance. Strong bronze skins help push the storage potential to 6 months and beyond under ideal conditions. Calibra is also an excellent choice for the northern tier of the US, producing jumbo to colossal bulbs that store exceptionally well. Adaptation: 35–45° latitude. USDA Certified Organic.Specs:
Quick Facts
-
Latin Name
-
Allium cepa
-
Days To Maturity
Days To Maturity
Average number of days from seeding date to harvest, within a specific crop group. If a transplanted crop: average number of days from transplant date. Not sure if crop is direct-seeded or transplanted? Check the Growing Information box for details. If crop can be both direct-seeded or transplanted, days to maturity refers to direct seeding. Days to maturity for all flowers and herbs is calculated from seeding date.
Close
-
110 Days
-
Hybrid Status
Hybrid Status
Hybrid: The offspring of a cross between two or more distinct parent lines, usually of same species, and selected for improved traits.
Close
Open-pollinated: A non-hybrid variety that can reproduce itself in kind, demonstrating relatively stable traits from one generation to the next. -
Hybrid (F1)
-
Product Features
Product Features
-
Organic Seeds, Plants, and Supplies
-
Plants, or seeds harvested from plants, that have been grown without synthetic fertilizers or pesticides, strictly adhering to the USDA's National Organic Standards Board (NOSB) organic gardening practices are designated as Organic.
Supplies that meet the USDA's National Organic Program (NOP) rules according to a third-party authority such as OMRI, WSDA, and/or a local authority such as MOFGA or NOFA.
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- This product does not ship to the following countries: United Arab Emirates, Austria, Australia, Barbados, Belgium, Bulgaria, Bermuda, Bahamas, Switzerland, Cyprus, Czech Republic, Germany, Denmark, Estonia, Spain, Finland, France, United Kingdom, Greece, Hong Kong, Croatia, Hungary, Ireland, Iceland, Italy, Japan, Republic of Korea, Kuwait, Cayman Islands, Lithuania, Luxembourg, Latvia, Malta, Netherlands, Norway, New Zealand, Oman, Poland, Portugal, Qatar, Romania, Saudi Arabia, Sweden, Singapore, Slovenia, Slovakia, San Marino, Thailand, Trinidad and Tobago, Taiwan, Ukraine.
SCIENTIFIC NAME:
Allium cepaCULTURE:
Onions require full sun and fertile, well-drained soil with a pH of 6.0–7.0. Sandy loam soils are ideal; in heavier soils, use raised beds or raised rows to promote soil drainage.DAY LENGTH:
Onion bulbing is triggered by day length, and maximum day length during the growing season increases from south to north. Short-day onions are grown at lower latitudes in the South, while intermediate and long-day onions are grown at higher latitudes. Refer to "Adaptation" in each variety description for details.DAYS TO MATURITY:
From direct seeding; subtract 10–15 days for days to maturity from transplant. TRANSPLANTING: In long- and intermediate-day areas, sow indoors 6–8 weeks before last frost date. Sow 128-cell trays, 1 seed/cell, and cover with 1/4" soil. Transplant 4" apart in rows 12–18" apart. Unruly tops may be clipped to 5" at time of transplant.DIRECT SEEDING:
In April or early May, or as soon as the soil can be prepared in early spring, sow in a 2" wide band, about 2 seeds/in., 1/4– 1/2" deep, rows 12–18" apart. Thin to 1 1/2–2" apart for highest yields in fertile soil. Thin to 3-4" apart for larger onions.AVG. DIRECT SEEDING RATE:
1 oz./25', 1M/50', 5M/250', 25M/1,250', 580M/acre at 20 seeds/ft., in rows 18" apart.CROP MAINTENANCE:
Keep onions well weeded with shallow cultivation. Onions are shallow-rooted and grow best with at least 1" per week of rain or irrigation, especially during the bulbing phase.DISEASE:
Adequate air circulation and crop rotation aids in reducing the risk of foliar disease.HARVEST:
When necks become soft and 50% of tops are falling over, pull and cure in well-ventilated space out of direct sunlight (to prevent greening) or sun-cure in field for 2–7 dry days before moving to dry location. Cure until tops are completely dried; about 2 weeks.STORAGE:
When dry, clip off tops and roots and store in onion bags or shallow boxes at near freezing and 65–70% humidity.TRANSPLANTS:
Avg. 1 oz./4,900 plants, 1 lb./78,750.SIZED SEEDS:
Standard on all varieties.SEEDS/LB.: 96,900–127,700 (avg. 112,000).PACKET:
250 seeds, sows 12' or makes 140 plants.Johnny's is committed to your success, every step of the way.
We want you, our customer, to be 100% satisfied with all of our seeds, tools, and supplies.
If anything you purchase from us proves unsatisfactory, we will either replace the item or refund the purchase price.