Martian Jewels Sweet Corn Seeds


This packet sows up to 25 feet.
3.875 out of 5 stars
(8 reviews)
Availability: In Stock
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.
$3.49 9 grams (~50 seeds)

Botanical Name: Zea mays

Days to Maturity: 80–90 Days

Family: Poaceae

Native: Americas

Hardiness: Frost-sensitive annual

Plant Dimensions: 6' tall

Variety Information: 8"–10" ears. Kernels are pearl-white while cobs, stems, and husks are deep-violet.

Type: Sugary (su) (Learn More)

When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date, and when soil temperature is at least 60°F; ideally 65°–90°F.

When to Start Inside: Not recommended; roots sensitive to transplanting. Best results occur when seedlings are transplanted less than 2 weeks old.

Days to Emerge: 5–10 days

Seed Depth: 1"–1 ½"

Seed Spacing: A group of 2 seeds every 12"

Row Spacing: 24"–36"

Thinning: When 4" tall, thin to 1 every 12"

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.

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Martian Jewels Sweet Corn Seeds Reviews

8 reviews

Martian Jewels sweet corn

4 out of 5 stars Aug 1, 2019
What little corn I got was good. Beautiful color good garden accent. Maybe would have done better but got a blight from all the rain. Only thing I didn't like it stains your hands purple when shucked.
Susan Eckard from WV

Best darn sweetcorn

5 out of 5 stars Aug 7, 2019
The description is wrong, my cobs are purple too. Regular old yellow sweetcorn is so boring to eat after enjoying this fine sweetcorn! Can't wait to plant more next year! Can't wait to make purple tamales!
rjk from IL

Beautiful corn.

5 out of 5 stars Sep 14, 2019
These corns are very attractive and tastes good. While the kernels are white when raw, the anthocyanin is leaked from the cob when you cook it and highlighting the kernels with purple. It look beautiful in a corn salad. The bare cobs are very purple. While harvesting the corn ears with bare hands, your palms will be temporarily stained with purple.
Max Johnson from OH


4 out of 5 stars Aug 6, 2020
These are pretty enough for the flower garden and make delicious sweet corn. Mine we stunted from lack of water, but looking forward to growing again next year with irrigation. Striking deep purple leaves, ears, and cobs with creamy white kernels.
Eve Manis from TN

Great corn

5 out of 5 stars Sep 27, 2021
This was so fun to grow! The stalks got about 6' tall, had 1-2 ears each. Corn was amazing - very sweet. Fun to watch grown as it grew so quickly. One my kids especially enjoyed as corn is one of their favorite veggies to eat.
Jordan from OH


2 out of 5 stars Oct 17, 2021
Loved the color of the corn husk, but the corn was not very sweet and did not produce very well in our area. Very spotty - I have grown other sweet corn here and it has done well, so I know it's not the soil.
Gretchen from AZ

Very slow growth

1 out of 5 stars Nov 6, 2021
I planted this at two different addresses. Neither did well at all, we had no harvest. Plants were puney and poor color.
Robin from KS
Owner Response: Hi Robin, Thank you for sharing your experience. It sounds like the seeds performed just fine however the environmental conditions could be improved. Corn is very "plastic" meaning its performance is dependent upon environmental conditions, showing differences in height, plant appearance, and yield based on soil, water, sun, and nutrient quality. A soil test is a great way to see how your soil can be improved for crops like corn which require a lot of water and nutrients. We are always happy to help you troubleshoot growing issues, please feel free to contact us.

Great heirloom type corn

5 out of 5 stars Oct 15, 2022
This is not the sweetest sweet corn, but it is still delicious. I've grown this corn for two years now and last year saved seeds. I successfully regrew this year from the seeds I saved. For smaller patches of corn, I recommend hand pollinating (touching the tassels to the new silk) to ensure good even kernel formation and growth. I've always planted some bush beans at the base of each stalk as well. The corn makes a gorgeous edition chopped and vacuum sealed in the freezer. I'll toss corn into many soups I make: white chicken and tomatillo chili, regular chili, vegetable soup, taco meat, and more.
Anna from PA

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