Walla Walla Sweet Spanish Yellow Summer Onion


Walla Walla Sweet Spanish Yellow Summer Onion

(125 days) Open-pollinated. “Join the funion” says the annual festival celebrated in Walla Walla, Washington, every June. Their signature sweet onion is said to have originated in the French island of Corsica and been brought to Washington by a French soldier. It became famous in the Pacific Northwest for its juicy sweet flavor and has been in commerce since around 1900. In Walla Walla, it can be wintered over. In our harsher zone, it must be sown in the spring for fall harvest. These large onions are renowned for their mild flavor as soon as they come out of the ground. They do not store. Adapted to 35-55° latitudes.

2498 Walla Walla Sweet Spanish
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A: 1/16oz for $2.60  
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B: 1/8oz for $3.90  
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C: 1/2oz for $7.50  
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D: 1oz for $13.00  
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E: 4oz for $32.00  
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K: 1lb for $109.00   ($103.55)
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Additional Information


Allium cepa

Days to maturity are from date of transplanting.

Culture: Start indoors in Feb. or March and transplant out in spring almost as soon as the ground can be worked. Set 4–6" apart in trenches in well-dug beds with generous quantities of organic matter. Avoid transplanting next to grass strips; slugs love to dine on tiny allium seedlings. Irrigate seedlings whenever the topsoil dries out.

Onions are day-length sensitive. Long-day types are for northern latitudes. The earlier they are set out, the more chance they have to make top growth while the days are lengthening. The more top growth, the greater the bulb size. After summer solstice they begin bulbing.

After half the onion tops fall, push over the remainder and harvest within a week. Field-cure in the sun about 10 days until dry, covering with a tarp in wet weather. Curing is essential for long storage. Hang sacks in a cool dry well-ventilated place, periodically removing sprouting or rotting bulbs. Onions survive light frosts. When it begins to warm up in spring, put your remaining storage onions in your refrigerator crisper. Most will keep without sprouting until your new crop is ready.

Minimum germination temperature 50°, optimum range 60-70°. We discourage the use of bottom heat because onions germinate poorly in temperatures above 70°.

We do not hold over hybrid onion seed because of precipitous decreases in germination. Onion seed is short-lived. Retest 1-year-old seed before using. Discard anything older.

Click for Onion sets and plants.


Diseases: PB: Purple Blotch, PR: Pink Root