Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Alliaceae
Native
Eastern Mediterranean region
Life Cycle
Annual
Plant Height
Tall (Greater than 24")
Further Information
Growing Conditions
Frost Tolerant
About Leek
Allium porrum
Leek plants resemble a long, fat green onion. The white lower portion has a mild onion flavor while the green tops are stronger tasting. Cold hardy to 20°F.
Planting Leek
Plant Spacing
A group of 3 seeds every 6"
Light Required
Full sun
Plant Height
Tall (Greater than 24")
Planting Depth
¼
Coverage & Planting Details
| Coverage | This packet sows up to 36 feet. |
|---|---|
| Row Spacing | 12" |
| Seed Depth | ¼ |
| Seed Spacing | A group of 3 seeds every 6" |
| Thinning | When 1" tall, thin to 1 every 6" |
| Germination | 7–14 days |
| Start Indoors | RECOMMENDED. 8 to 10 weeks before your average last frost date. |
| Direct Sow | 2 to 4 weeks before your average last frost date for late summer harvest, late spring for fall harvest, and in Mild Climates, late summer for the following spring harvest. Soil temperature should be at least 40°F, ideally 60°–85°F. |
| Growing & Harvesting | Harvest leeks when tops are 15"–18" tall, and shanks are at least 1" in diameter. Use a garden fork to gently lift and loosen soil under the leeks, and then pull them up by hand. Leeks tolerate temperatures as low as 20°F, and can therefore be harvested even after a few freezes, which enhances flavor. |
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: 12 Total 4 star reviews: 2 Total 3 star reviews: 2 Total 2 star reviews: 0 Total 1 star reviews: 2
Slide 1 selected
Search
Rating
Which best describes you as a gardener?
18 reviews
- LC S.Verified BuyerRated 5 out of 5 stars1/15/26Star of my garden in 2025
My 2025 garden was a great disappointment last year with the exception of these King Richard leeks. The weather was too wet in the spring and then too hot and dry in Nashville as summer arrived and nothing really thrived. However, these leeks were amazing! I started them inside and then transplanted them as instructed. I'll be planting them again this year. They are delicious!
Which best describes you as a gardener? BeginnerBIBotanical Interests1/19/26Hey LC,
Thank you so much for taking the time to share your experience with our King Richard Leek Seeds! We're so thrilled to hear that these were the star of your garden in 2025, especially after such challenging growing conditions! It sounds like you had a really tough season with all that wet spring weather followed by the hot, dry Nashville summer, but we're absolutely delighted that the King Richard leeks pulled through and thrived for you!
We love hearing that you followed the transplanting instructions and got such amazing results - and that they're delicious too! That's exactly what we love to hear. We're so excited that you're planning to grow them again this year. Thank you for choosing us and for sharing your growing success with us. Keep on growing 🌻️
- PaulaRated 5 out of 5 stars12/12/255 Stars
I haven't planted the yet, but I'm sure they will be fine.
- Robert V.Verified BuyerRated 3 out of 5 stars10/15/25Hardly any Seeds
I originally would give a one star but after talking with Botanical Interest, I upgraded to a four star. Recieved my order quickly. Upon opening the pack of seeds though I found it almost empty. I contacted BI and they apologized for the error. They made up for it right away by putting credit in my account as well as a code for free shipping. I know it wasn't their fault as errors can happen with machine packaging. Very grateful and happy on the way they resolved my little problem. Thank you BI.
Which best describes you as a gardener? ExpertBIBotanical Interests10/18/25Hey Robert,
Thank you so much for this 3-star review and for giving us the opportunity to make things right! We're so grateful that you reached out about the packaging issue with your King Richard Leek Seeds - and we're thrilled that our customer service team was able to resolve everything quickly with account credit and free shipping.
We absolutely appreciate your understanding that these machine packaging errors can happen, and it means the world to us that you took the time to update your review after experiencing our commitment to making things right. That kind of feedback helps us continue improving while showing other gardeners that we truly stand behind every seed packet we send out.
Your patience with the initial issue and recognition of our quick resolution will be so helpful for other gardeners who want to know they can trust us to deliver quality King Richard Leek Seeds and exceptional service when anything doesn't go as expected!
Keep on growing 🌻️
- Sarah G.Rated 5 out of 5 stars11/25/245 Stars
I have grown these leeks for 3 years now in Denver (6a). I love that I can leave them in the ground until November-December and get that extra growing time after frost. I start with the winter sowing method in February and transplant in April/May. They are hardy, delicious, and I have had no issues with bugs. I plan to grow these every year!
- George C.Verified BuyerRated 5 out of 5 stars11/18/245 Stars
Your (seeds) products have been great.
Growing leek plants for planting now.
Which best describes you as a gardener? Intermediate