How to Grow Texas Sweet 1015 Onion
Texas Sweet 1015 Onion
Allium cepa 'Texas Sweet 1015'
vegetableTexas Sweet 1015 is a large, mild yellow onion variety famous for its exceptional sweetness and tender texture. Developed at Texas A&M University, it is a short-day variety that produces jumbo bulbs weighing 1-2 pounds. This heirloom variety is prized for fresh eating, slicing, and light cooking applications.
When should you plant Texas Sweet 1015 Onion in your zone?
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Example Texas Sweet 1015 Onion timeline · Pittsburgh, PA (Zone 6b)
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Plant Texas Sweet 1015 Onion
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Texas Sweet 1015 Onion
Around Sep 14≈ 150 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Texas Sweet 1015 Onion dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-10; best grown as a fall/winter crop in southern regions
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Seedling/Transplant
2-3 weeksSmall plants with 2-3 thin green shoots, establishing root system
Plant transplants in late September to early November in southern zones. Keep soil consistently moist. Provide protection if frost threatens.
Vegetative Growth
8-10 weeksMultiple green shoots develop, forming a bushy plant; no bulbing yet
Maintain consistent watering and fertilize every 3-4 weeks with balanced or nitrogen-rich fertilizer. Ensure adequate sunlight. Monitor for pests.
Bulb Development
6-8 weeksBase of plant thickens as bulb begins to form; green foliage continues growing
Switch to phosphorus-rich fertilizer to promote bulb enlargement. Maintain even soil moisture. Days lengthen trigger bulbing in short-day varieties.
Maturation
3-4 weeksBulb reaches full size; foliage begins yellowing and falling over naturally
Reduce watering as tops die back. Do not break over tops artificially. Allow natural curing process. Stop fertilizing.
Harvest & Curing
Harvest periodTops completely dry and papery; bulbs ready for harvest and storage
Harvest when 50-75% of tops have fallen over. Cure in warm, dry, well-ventilated location for 2-3 weeks before storing.
Common Pests
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Spray with neem oil or insecticidal soap; encourage beneficial insects; remove heavily infested leaves
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Use disease-free sets; avoid overhead watering; ensure excellent drainage; remove infected bulbs immediately
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Improve air circulation; avoid wetting foliage; apply copper fungicide if needed; rotate crops
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Use resistant varieties when possible; practice crop rotation; avoid waterlogged soil
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Use row covers on young plants; apply diatomaceous earth; remove affected plants; rotate planting location
Uses
Fresh eating and slicing
CulinaryTexas Sweet 1015 is renowned for its exceptional mildness and sweetness, making it ideal for eating raw in salads, salsas, and sandwiches. The tender flesh is less pungent than storage onions, perfect for those preferring milder flavors. [source]
Grilling and light cooking
CulinaryThe high sugar content caramelizes beautifully when grilled or lightly sautéed, developing rich, sweet flavors without becoming harsh. Not ideal for long-cooking applications. [source]
Ingredient for sweet onion soups
CulinaryUsed in French onion soup, creamed onion dishes, and sweet onion spreads where sweetness is a desirable characteristic. [source]
Nutritional benefits
MedicinalOnions provide quercetin and other polyphenols with potential anti-inflammatory and antioxidant benefits. Texas Sweet varieties contain beneficial compounds similar to other onion types. [source]
Natural dye and preservation
HouseholdOnion skins have been historically used to create natural dyes for textiles. Fresh bulbs can be braided or netted for storage and gradual use throughout winter. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest in late April to May in southern zones when 50-75% of tops have naturally fallen over. Gently loosen soil and pull bulbs carefully. Cure in a warm (70-80°F), dry, well-ventilated location (garage, shed) for 2-3 weeks until outer skin is papery and necks are completely dry. Store at 50-60°F in mesh bags or braided strings in a cool, dark place; can last 3-4 months if properly cured.
Fun Facts
- 🌱 Texas Sweet 1015 was developed at Texas A&M University and is named for the recommended planting date (October 15th) in Texas, making it a regionally optimized variety.
- 🌱 The sweetness of Texas 1015 onions compared to other varieties is due to lower sulfur and pyruvic acid content, which makes them milder and less likely to cause tears when cutting.
- 🌱 A single Texas Sweet 1015 bulb can weigh 1-2 pounds and measure 4-5 inches in diameter, making them among the largest onion varieties and requiring adequate space to develop fully.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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