Yellow Sweet Spanish Utah Bulb Onion Seeds


This packet sows up to 30 feet.
4.6 out of 5 stars
(5 reviews)
Availability: In Stock
The 'Sweet Spanish' onion was grown in the U.S. at least as far back as 1916. 'Yellow Sweet Spanish Utah' is from that early type, producing large, 3"–6" globe-shaped bulbs with amazingly mild, sweet flavor. A long-day variety, it grows best in states north of the 37th parallel. Utah designated this onion the state vegetable in 2002. Caramelize onions for the perfect patty melt condiment.
$1.89 750 mg (~180 seeds)

Botanical Name: Allium cepa

Days to Maturity: 110–130 days

Family: Alliaceae

Native: Exists only in cultivation

Hardiness: Biennial grown as an annual

Variety Information: Large, 3 ½"–6", up to 2 lbs., pale yellow, globe-shaped bulbs with coppery wrapper; 12"–18" tops. 'Yellow Sweet Spanish Utah' is a bulbing, yellow, long-day onion with a moderate storage period.

Type: Long-day onion (Learn more)

Attributes: Storage

When to Sow Outside: 4 to 6 weeks before your average last frost date, or as soon as soil can be worked; when soil temperature is at least 45°F.

When to Start Inside: RECOMMENDED. 10 to 12 weeks before your average last frost date. Transplant outdoors 4 to 6 weeks before your average last frost date. The earlier the start, the bigger the bulb. Ideal soil temperature is 60°–85°F.

Days to Emerge: 7–15 days

Seed Depth: ¼"

Seed Spacing: A group of 2 seeds every 6"–8"

Row Spacing: 12"–16"

Thinning: When 2" tall, thin to 1 every 6"–8"

Harvesting: When onion tops have fallen over and turned yellow or brown, they are ready for harvest. Harvest in the morning, lifting onions with a garden fork. Dry them in the garden in the sun for 2 to 3 days, lightly covering the bulbs with straw, or the tops of other onions to prevent sunscald. Cure onions for 3 to 7 days in a dry area with good air circulation. Once dry, cut the roots to 1/4", and the greens to 1" to create a seal, preventing decay.

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Yellow Sweet Spanish Utah Bulb Onion Seeds Reviews

5 reviews

Nice Big Flavorful Onions

5 out of 5 stars Aug 15, 2020
I grew these in our regular garden bed & in our Hugelkulture raised bed. They grew well in both, but were a little larger in the Hugelkulture bed. Wonderful onions. Nice colored skins for braiding. Will use again.
Doreen from OH

Worked well for my first try from seeds

4 out of 5 stars Sep 21, 2021
Grew this in 10a SF bay area. Started in Feb, were mature in Aug. I seeded into cups and let the ones that came up grow for a few months before transplanting to a bed. They did not all get enough sun, so my recommendation is to place them in a particularly sunny location. Also, Onions want water and want it every day, so don't skimp. They take a long time but not all that much space. Seeds are small and maturity takes time, so these are a plan-ahead sort of crop. Very happy with what I got from this packet. Recommended.
Dave from CA


5 out of 5 stars Nov 28, 2021
Beautiful and tasty. Easy to grow.
Dana from WI

Seeds are strong

4 out of 5 stars Mar 13, 2022
I planted these onion seeds and 4 other vege on March 10th. Today is March 13th. Saw my first onion sprouting yesterday. Checked again today - more sprouts poking up from the onions. I'm very pleased and hope the growth continues for all of my seeds. Reserving a 5- star rating for farther into the growing/harvesting season.
Kim from PA

Precious seeds

5 out of 5 stars May 4, 2022
Every time I receive a packet of seeds from Botanical Garden, I feel the care and love, in all the details. I enjoy the description of the plants, the helpful tips inside the packet, and the efficient service. The seeds sprout very timely and healthy. Very satisfied.
Regina from TN