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Disease Resistance:


High Resistance


Intermediate Resistance


Pink Root

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AAS (All-America Selections) Winners

AAS (All-America Selections) Winners

We carry dozens of All-America Selections winners, including seven Johnny's-bred varieties -- Jasper Cherry Tomato; Baby Bear Pumpkin; Bright Lights Swiss Chard; Diva Cucumber; Sunshine Kabocha Squash; Bonbon Buttercup Squash; and Carmen Pepper. Read about Johnny's Plant Breeding Program (article by Rob Johnston Jr., Johnny's founder and chairman).

All-America Selections is an independent, nonprofit organization that trials new varieties alongside two or three similar varieties currently on the market, then introduces only the best garden performers as AAS Winners. Submitted vegetable and flower varieties are tested by a geographically divergent network of independent judges to determine whether their garden performance is truly superior, with winners chosen on the basis of scores received from judges at 34 sites in the U.S. and Canada. Johnny's is proud to be an official trial ground site for AAS. (To learn more, visit the All-America Selections website.)

Sierra Blanca

Sierra Blanca(F1) Onion Plants


Product ID: 67

Big, mild white onions.

Sierra Blanca is the same variety as Super Star. It has been renamed by the breeder. It is widely adapted, day-neutral, and matures well anywhere in North America from spring sowing. Suitable for fall planting where short-day onions are normally grown. Produces uniform, large, white-skinned onions with mild flavor and thick rings. Great for salads, slices, onion rings, and frying. Not for long storage. Intermediate resistance to pink root. Offered in bunches, avg. 50-60 plants per bunch (Unit). Also offered as seeds.

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Quick Facts

Days to Maturity or Bloom:   109

Plant Cycle:   (A)  

Product Symbols:

AAS (All-America Selections) Winners  

Disease Resistance Codes:


Shipping Information & Notes

This product cannot be shipped to the following states:AE, AP, AS, FM, GU, ID, MH, MP, PR, PW, VI

This product cannot be shipped to Canada

This product cannot be shipped outside the United States or Canada

1) Onion plants are shipped weekly from mid-January through the end of April, starting in the southern U.S. You may choose your desired ship week or plants will be sent at the appropriate planting time for your location (by USDA Plant Hardiness Zone). Please be aware that by choosing ship dates earlier than the recommended date for your zone, there is a chance that the product could freeze in transit.

2) Plants arrive as dormant starts. Expect them to be dry and/or pale in color due to dormancy and shipping. They are very hardy and will thrive if cared for properly.

3) Offered in bunches of approximately 50-60 plants, one variety per bunch. Bunches selected must be of the same variety.

4) Plants are shipped via the U.S. Postal Service within the continental U.S. Please provide a physical UPS address if ordering 11 or more bunches.

5) Plants are shipped via UPS to AK and HI. Please provide a street address.

6) Onion plants cannot be shipped to ID, outside the U.S., or to U.S. territories.

Growing Information


CULTURE: Onions require full sun and fertile, well-drained soil with a pH of 6.0-7.0. Sandy loam soils are ideal; raised beds or raised rows are recommended for heavier soils to promote soil drainage.
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.
TRANSPLANTING: In short-season areas, sow seeds indoors in flats in late February to mid-March. Broadcast 1/2" apart and cover 1/4". Tops may be clipped to 5" tall. Transplant to the garden 4" apart, or sow 5 seeds in each cell of 1-1 1/2" diameter plug trays, thinning to 3 per cell. Transplant each cell 6" apart.
CULTIVATION: Keep onions well weeded with shallow cultivation.
WATER: Onions are shallow rooted and grow best with at least 1" per week of rain or irrigation, especially during the bulbing phase.
DISEASES: Adequate air circulation and crop rotation aids in reducing the risk of foliar disease
HARVEST: When necks become soft and tops are falling over, pull and sun-cure at least 2-7 days, depending on weather. Move to a protected location to finish drying.
STORAGE: When dry, clip off tops and roots and store in onion bags or shallow boxes at near freezing and 65-70% humidity.
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 if transplants are used.
AVG. DIRECT SEEDING RATE: 1 oz./25', 1M/50', 5M/250', 25M/1,250', 580M/acre @ 20 seeds/ft., in rows 18" apart.
TRANSPLANTS: Avg. 1 oz./4,900 plants, 1 lb./78,750.
SIZED SEEDS: Standard on all varieties.
SEED SPECS: SEEDS/LB.: 96,900-127,700 (avg. 112,000).
PACKET: 250 seeds, sows 12' or makes 140 plants.

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