Martian Jewels Sweet Corn Seeds

Zea mays

Though the striking color is other-worldly, the flavor of this one-of-a-kind jewel is more traditional—slightly less sweet than modern, very sweet hybrids. It was a labor of love to produce an open-pollinated corn that is loaded with beneficial anthocyanins (antioxidants), thanks to its Native American Hopi blue corn parents. Harvest fresh, or wait a bit longer and the sugar subsides, becoming perfect for breads or chowder, or wait even longer to harvest, and use the dried kernels for flour.

$4.49 ~45 seeds
4.0
Rated 4.0 out of 5 stars
22

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Features

Family

Poaceae

Native

Americas

Life Cycle

Life Cycle

Annual

Plant Height

Plant Height

Tall (Greater than 24")

Further Information

Growing Conditions

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

Plant Spacing

A group of 2 seeds every 12"

Light Required

Light Required

Full sun

Plant Height

Plant Height

Tall (Greater than 24")

Planting Depth

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

4.0
Rated 4.0 out of 5 stars
Based on 22 reviews
Total 5 star reviews: 11 Total 4 star reviews: 6 Total 3 star reviews: 2 Total 2 star reviews: 1 Total 1 star reviews: 2
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Rating
Ratings
Which best describes you as a gardener?
Which best describes you as a gardener?
22 reviews
  • Celine K. L.
    Verified Reviewer
    Rated 4 out of 5 stars
    10/14/25
    Beautiful 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
  • ERK
    Verified Reviewer
    Rated 3 out of 5 stars
    8/7/25
    Fun 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 Buyer
    Rated 5 out of 5 stars
    10/14/24
    5 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 Buyer
    Rated 4 out of 5 stars
    9/1/24
    4 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.

  • Audra E.
    Verified Buyer
    Rated 1 out of 5 stars
    8/8/24
    1 Star

    Majority of the cobs only grew some corn. A few cobs grew correctly. Will try a different corn next season.

    Which best describes you as a gardener? Intermediate

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