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One of the most essential ingredients for cooking, onions are a fun and useful addition to any garden. Growing onions from seed is easy and it opens the door to varieties that might be hard to find as plants or sets. We offer a wide selection of heirloom onions and leeks that are great for fresh eating, sautéing, or caramelizing. Shop our selection of heirloom onion seeds today and find one that's perfect for your family.
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Guaranteed to Grow
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I had all but one seed germinate and they were popping up 3 days after planting!
Every one of these I planted germinated beautifully! I didn’t even do anything fancy, just a daylight bulb and a heated blanket.
~100% germination rate on these Martino's Roma seeds from Thresh Seed Co. Now I'm swimming in starts! I am so impressed by the quality Thresh is offering for the price--both in product and customer service. Will be a long time customer.
I was elated to find Principe Borghese and Martino's Roma from the same supplier. I've had the good fortune of a ~100% germination rate!! Nearly three times as many tomato plants as I need--excited to give these extra starts to friends and family and spread the good word about Thresh Seed Co.!
Fast shipping! Came early.
First time growing this variety so, I'll update after harvest.
Excellent germination rate. Grew very well. Tasted even better. Highly recommend.
Finally Sweet Marjoram is here, so excited! Thanks
I received my Thyme, Winter seeds today I am excited to get some of them started in a seed tray and in the ground. I will update you when I get them planted in the ground.
I received my Red Swan Bush peas today and I am excited to get them planted in the ground and taste them. I will update you when I get them planted and harvest them.
I received my Rooster Spur Hot Peppers seeds today I am excited to plant them in a seed tray to get them started. I will update you when I get them planted in the ground.
I received my Genovese Basil Seeds today from Thresh they look great I am excited to put some in a seed tray today and get them planted in the ground. I will update you when I get them planted in the ground.
I received my Bachelor's Button flower seeds today they look great . I'm excited to put some in a seed tray to get them started. I have always had good germination from Thresh Seeds . I will update you when I get them planted in the ground.
I received my Marconi Red Pepper seeds today the seeds looks great . I'm excited to put some in a seed tray to get them started . Ive never had any issues with orders from Thresh. orders arrived quickly I will update you when I can plant them in the ground.
I ordered beef steak tomato seeds from Thresh Seed company and planted them in peat pots after I got them. Those seedlings were up in a week and going strong. It's still too cold to put them in the ground, but I am satisfied with them and I feel like they will yield tomatoes plentiful. We have a community garden at the church to raise food for those who can't afford fresh vegetables, and I am thankful.
I found this variety intriguing and wanted to add them to the garden this year. I started these seeds 2 weeks after other varieties that have still haven't sprouted. Within 5 days of planting, I have 5 vigorous starts - so I'm quite pleased. The older varieties are always an asset. Glad I found these!