Nirvana Supersweet Corn


Nirvana Supersweet Corn

Zea mays
(75 days) Supersweet F-1 hybrid. Bicolor, 8" ears, 16-18 rows. We’ve been saying “Nevermind” to Supersweet corn for ages: the early years of sh2 breeding never came close to capturing the flavor and tenderness we demand. But a select few progressive Supersweets brought balanced excellence to our attention in our central Maine trials. At your first bite into the crisp but tender kernels, Nirvana’s wash of full corn flavor hits and persists. The bold sh2 sweetness and perfect flavor swirl. Holding quality in the field and after harvest is superb. Do not direct-seed until soil temps exceed 65˚. Isolate from all other corn types by 300 feet.

660 Nirvana
Item Discounted
A: 1/2oz for $5.00   
sold out
B: 2oz for $15.00   
sold out
C: 8oz for $34.00   
sold out
D: 1lb for $62.00   
sold out
E: 5lb for $273.00   
sold out

Additional Information

Supersweet Corn

For decades, Fedco has been a firm proponent of “eating quality” in sweet corn with flavor, texture and kernel depth as our in-house metrics. We’re a “corny” flavor bunch, dismissing sweetness as the sole measure of breeding progress. Until recently, we hadn’t encountered eating excellence in a Supersweet (sh2) variety. Breeders have now balanced the extra-sweetness with tenderness, creaminess and full flavor. With the sh2 gene, conversion of sugar to starch occurs at a much slower rate, so corn stays sweet long after harvest.

Culture: Supersweet types germinate poorly in cool soils. Wait until soil temps exceed 65° for direct seeding—mid-June in central Maine.

Supersweets require 300' isolation from all other corn types to prevent the kernels of other corns from becoming starchy and tough. If you don’t have space to isolate, choosing a Supersweet means foregoing other sweet corn types.

Sweet Corn at a Glance

varietydayscolortype (see below)heightear length# rows
516Ashworth OP72yellowNormal Sugary60"6-7"12
541Bodacious RM77yellowSugary Enhanced87"8"18
561Incredible RM85yellowSugary Enhanced90"8"18
582Ambrosia75bicolorSugary Enhanced78"8"16
636Luther Hill OP82whiteNormal Sugary48"3-6"12
658Silver Queen96whiteNormal Sugary102"8"14-16

Types of sweet corn

Normal Sugary (su): standard varieties with traditional sweet corn texture & flavor. Sugar converts to starch quickly, so eat them within a few days. Tend to have high yields and germinate well in cool soils.

Sugary Enhanced (se): more sugar than su, tender kernels & slightly longer storage time. The * indicates heterozygous (only one parent contributes the se gene); all others are homozygous (both parents se).

Supersweet (sh2): 4 to 10 times the sugar content of su and se. Conversion of sugar to starch occurs at a much slower rate. Stays sweet long after harvest. Extra shriveled seed does not germinate well in cool soil.

Synergistic: more sugar than se. Very tender with long harvest and storage windows. Can be homozygous or heterozygous se with added sh2 kernels.

TripleSweet® Sugary Enhanced: has homozygous se kernels, and 25% of these also contain the sh2 trait.


  • About 85–275 seeds/oz. 1 oz packet sows 25 ft, 1 lb sows 400 ft.
  • Seeds per packet vary, open-pollinated selections average 100 seeds/oz, normal sugary varieties 140 seeds/oz, and SE cultivars with shrunken seeds 150-160 seeds/oz.
  • Days to maturity are from emergence after direct sowing; for transplants, subtract 20 days.

Culture: Untreated sweet corn seed will not germinate in cold wet soil. Please be patient and wait till soil warms to at least 60° before sowing, or start seedlings indoors and transplant at 3–6" before taproots take off. Minimum soil temperature 55°, optimal temperature range 65–85°. Tender, will not survive frost. Heavy nitrogen requirements.

Germination Testing

For the latest results of our germination tests, please see the germination page.

Our Seeds are Non-GMO


All of our seeds are non-GMO, and free of neonicotinoids and fungicides. Fedco is one of the original companies to sign the Safe Seed Pledge.