Botanical Interests
Monastrell Bulb Onion Seeds
Monastrell Bulb Onion Seeds
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Product Details
Product Details
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- Variety Info
- Sowing Info
- Growing Info
Variety Info
Days to Maturity: 106-110 days
Family: Alliaceae
Native: Exists only in cultivation
Hardiness: Biennial grown as an annual
Exposure: Full sun
Variety Info: Uniform, 3.5"-4" slightly flattened, round bulbs with dark red rings. "Monastrell"is an intermediate-day onion with a 4- to 6-month storage life.
Attributes: Intermediate Day
Sowing Info
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: 1/4"
Seed Spacing: A group of 2 seeds every 4"
Row Spacing: 12" - 16"
Thinning: When 2" tall, thin to 1 every 4"
Growing Info
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.
Special Care: Keep growing area weed-free. Onion size can decrease 4% per day if competing with weeds that's 50% in 2 weeks. If bulb pushes itself out of the ground, you may cover it lightly with straw, but not soil, as soil will prevent the onion bulb from forming properly.
- Katie L.Verified ReviewerRated 4 out of 5 starsJan 9, 2026Pretty good start
I had 14 out of 18 cells germinate (and I over started, because I only have room for 14 this year, so it works out perfectly). Pretty happy with that. I will update if I can after the growing season is complete
Which best describes you as a gardener? BeginnerEGEpic GardeningJan 13, 2026Hey Katie,
Thank you so much for taking the time to share your experience with our Monastrell Bulb Onion Seeds! We're absolutely thrilled to hear that you got such great germination with 14 out of 18 cells - that's fantastic! And how perfect that it worked out exactly for the space you have this year! We love hearing about those happy gardening coincidences. We'd love to hear how your growing season goes, so please do update us if you can! Thank you for choosing us and for sharing your growing success with us. Keep on growing 🌻️
- Mark N.Rated 5 out of 5 starsMar 4, 20255 Stars
I had a 90%+ germination rate. So far so good. Seedlings are developing strongly and I am looking forward to transplanting them outside in a month or so.
