Texas 1015Y SuperSweet Onion

Amaryllidaceae

Large, exceptionally sweet yellow onion developed by Texas A&M University. Named for optimal seed planting date of October 15th. Short-day variety — bulbs form when daylight is 10-12 hours, best suited for southern zones (7-9). Softball-sized bulbs 4-5" diameter, ~1 lb. Stores 2-3 months. Official Texas State Vegetable.

At a Glance

Days to Maturity

105–115 days

Sun

6+ hours

Spacing

4–6 "

Seed Start

10–16 weeks

before transplant

Container

Not Ideal

5+ gallon pot

Zone Planting Guide

Your USDA Zone:

Growing Guide

Germination

Germination Time 7–14 days

Optimal Temp 65°F

Seed Depth 0.25"

Transplanting

Min Soil Temp 40°F

Harden Off 7 days

Watering

Weekly Water 1 "

Needs Moderate

Soil

pH Range 6–7

Support None needed.

Resilience

Heat: Moderate Cold: High Drought: Low

Nutrition

Feeding Intensity Moderate feeder

Recommended Recipes Fish emulsion, Bone meal

Harvest

Tops fall over and yellow. Pull, brush soil, cure 1-2 weeks.

Storage 75 days — See curing and storage sections.

Sources

university Texas A&M AgriLife Extension seed_catalog Hoss Tools grower Dixondale Farms seed_catalog Territorial Seed seed_catalog Gurney's

More Roots

Texas 1015Y SuperSweet Onion Planting Dates by Zone

Planting dates for Texas 1015Y SuperSweet Onion vary by USDA hardiness zone. Select your zone below for frost dates, start-indoors timing, and a full monthly planting calendar.

Zone 5A Zone 5B Zone 6A Zone 6B Zone 7A Zone 7B Zone 8A Zone 8B Zone 9A Zone 9B

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