Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Alliaceae
Native
Exists only in cultivation
Life Cycle
Annual
Plant Height
3" to 4" large, flattened globe onions
Further Information
Plant Resistance
Pink Root Resistant
About Yellow Granex PRR Bulb Onion Seeds
Allium cepa (hybrid)
Large, 3"–4" yellow, flattened globe-shaped onions, crisp and sweet. 'Yellow Granex PRR' has resistance to pink root disease (PRR). The Granex-type onion is a hybrid cross between a round Grano onion and a flat Bermuda onion, and are said to be the sweetest of the super sweet onions.
Planting Onion
Days to Maturity
110–160 days
Plant Spacing
A group of 2 seeds every 4"
Light Required
Full sun
Plant Height
3" to 4" large, flattened globe onions
Planting Depth
¼"
Coverage & Planting Details
| Coverage | This packet sows up to 32 feet. |
|---|---|
| Row Spacing | 12"–16" |
| Seed Depth | ¼" |
| Seed Spacing | A group of 2 seeds every 4" |
| Thinning | When 2" tall, thin to 1 every 4" |
| Germination | 7–15 days |
| Start Indoors | 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. |
| Direct Sow | 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. |
| Growing & 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. |
Find Your Frost Date & Grow Zone
Average First Frost Date
October 19
Average Last Frost Date
May 19
Your Hardiness Zone is
5b
Send Your Recommendation
Total 5 star reviews: 11 Total 4 star reviews: 1 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
Which best describes you as a gardener?
13 reviews
- yvesRated 5 out of 5 stars12/2/255 Stars
They sprouted quickly, even though its only been 4 days.
- Lawrence H.Verified BuyerRated 5 out of 5 stars11/15/25granex review
Good germination rate. Plants transplanted well and are developing nicely. I will only plant onion seeds from now on
Which best describes you as a gardener? ExpertBIBotanical Interests11/24/25Hey Lawrence,
Thank you so much for taking the time to share your experience with our Yellow Granex PRR Bulb Onion Seeds! There's something really satisfying about growing onions from seed and watching that whole journey from tiny sprout to full bulb. Thanks for sharing your growing success with us. Keep on growing 🌻️
- Catherine O.Verified BuyerRated 5 out of 5 stars2/7/255 Stars
I can always rely on the quality and value for seeds from BI.
- TavonyaVerified BuyerRated 5 out of 5 stars12/30/245 Stars
My boyfriend loves this onion. I will grow this again
- TavonyaRated 5 out of 5 stars12/30/245 Stars
My boyfriend loves this onion. I will grow this again