Sweet Spanish Yellow Utah Jumbo
Onion · Bulbing (Full-Size)
Heirloom
Allium cepa
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Amaryllidaceae (Onion family) · Genus: Allium
About
Onion Sweet Spanish Utah is a very large onion. Often weighing 2 pounds. this is an excellent variety for slicing. Its white flesh has a mild, sweet, delicious flavor.
Characteristics
Color
Yellow
Day Length
Long-Day
Flavor
Sweet
Intended Use
Fresh/Slicing
About the Plant
Life Cycle
Annual
❄
Hardiness
Cool-Season/Hardy
☀
Exposure
Full Sun
💧
Moisture
Evenly Moist
🌍
Origin
Spanish
🌱
Germination
10–12 days
at 35–95 °F
⏳
Days to Maturity
115–120 days
Plant Height
1.5–2 ft
Fruit Size
4–6 in
⚖
Fruit Weight
16–32 oz
How to Plant
🏠
Start Indoors
10-12 Weeks Before Last Frost
Transplant
4-6 Weeks Before Last Frost
🌸
Direct Sow (Spring)
4-6 Weeks Before Last Frost
🍂
Direct Sow (Fall)
6-8 Weeks Before First Frost
🪴
Container Friendly
Yes
Planting Depth
0.5 in
Seed Spacing
3–6 in
Row Spacing
12–18 in
Thin To
3–6 in
🌡
Optimal Soil Temp
65–85 °F
🌡
Soil Temp
35–95 °F
🌡
Air Temp
25–80 °F
When to Plant in Your Area
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Planting and Care Instructions
Start indoors 8-10 weeks before transplanting outdoors. When transplanting, clip plants to 3 inches and plant 2 inches deep. Or, sow directly in the garden when the ground can be worked, placing 2-3 seeds per inch. Thin to 3 inches apart when the plants are 6 inches tall. Harvest by pulling bulbs when the tops are brown and dry.
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