Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Poaceae
Native
Americas
Life Cycle
Annual
Plant Height
Tall (Greater than 24")
Further Information
Growing Conditions
Frost Sensitive
About Martian Jewels Sweet Corn Seeds
Zea mays
8"–10" ears. Kernels are pearl-white while cobs, stems, and husks are deep-violet.
Planting Corn
Days to Maturity
80–90 Days
Plant Spacing
A group of 2 seeds every 12"
Light Required
Full sun
Plant Height
Tall (Greater than 24")
Planting Depth
1"–1 ½"
Coverage & Planting Details
| Coverage | This packet sows up to 25 feet. |
|---|---|
| Row Spacing | 24"–36" |
| Seed Depth | 1"–1 ½" |
| Seed Spacing | A group of 2 seeds every 12" |
| Thinning | When 4" tall, thin to 1 every 12" |
| Germination | 5–10 days |
| Start Indoors | Not recommended; roots sensitive to transplanting. Best results occur when seedlings are transplanted less than 2 weeks old. |
| Direct Sow | RECOMMENDED. 1 to 2 weeks after your average last frost date, and when soil temperature is at least 60°F; ideally 65°–90°F. |
| Growing & Harvesting | Corn is ready about 3 weeks after the silks appear. Harvest when the silks are brown, but not dried, and the husks are dark green; ears should be plump, and rounded rather than pointed at the tip. To test for ripeness, gently pull back the husk and pop a kernel; the liquid should be whitish; if it is still clear, ears are not quite ready. |
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
Slide 1 selected
Search
Rating
Which best describes you as a gardener?
23 reviews
- Mandy P.Verified BuyerRated 2 out of 5 stars8/14/26Disappointed
I bought this to replace some older corn seed that didn’t germinate. Neither did these. Maybe it was the heat this year.
Which best describes you as a gardener? IntermediateBIBotanical Interests8/18/26Hey Mandy
Thank you so much for taking the time to share your thoughts in a review. We're sorry to hear that the Martian Jewels Sweet Corn Seeds didn't germinate for you this season. Your feedback is invaluable to us, and we are committed to ensuring your experience is positive. We've reached out to you via email to offer assistance. Thank you once again for your input. Keep on growing 🌻
- Celine K. L.Verified ReviewerRated 4 out of 5 stars10/14/25Beautiful corn
The husks and cobs have a gorbeous deep color that we enjoyed using as a dye bath and paint, and the corn is as described sweet, though not as sweet as super modern sugar corns, with a hearty enjoyable texture. Made small cobs, but they did fill out enough to enjoy even though we planted this late
Which best describes you as a gardener? Professional - ERKVerified ReviewerRated 3 out of 5 stars8/7/25Fun for something different
Grow this as a novelty, not as your main summer sweet corn. Plants grew alright and were lovely, but the corn itself is a little lackluster, and pollination was not consistent, despite proper planting and plenty of breeze. Also, it’s messy! My hands were stained for a couple days just trying to shuck, cook and eat this corn. That said, the cobs had a distinct milk chocolate flavor, which was really cool…wonder what some cob broth could be used to bake perhaps…? All those anthocyanins wasted though, since the color isn’t in the kernels. It was a fun, aesthetic experience, but I’m going with a more tried and true heirloom next year.
Which best describes you as a gardener? Intermediate - Andrea H.Verified BuyerRated 5 out of 5 stars10/14/245 Stars
I am very curious to try growing some new varieties of seeds.
Thank you for offering a large variety.
Which best describes you as a gardener? Intermediate - Annie E.Verified BuyerRated 4 out of 5 stars9/1/244 Stars
This was a very rewarding first experience growing corn. I would recommend getting a high nitrogen fertilizer. Corn seeds germinated uniformly and well. Plants varied in height, some produced corn some did not get large enough to. Plants are very attractive with green and dark maroon purple features. Corn was smaller but tasted good. I enjoyed both the look of the plant and the edible factor. Best to grow where won’t be affected by strong wind, unless it’s supported. I will grow this again.