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Corn, King Kool Hybrid

Short Description

Early-planting, early-harvesting supersweet corn!

Full Description

Sweet, early and delicious. This toothsome bicolor sweet corn jumps out of the ground a full week or more before other varieties! For cooler climes and high altitudes, King Kool's seedlings handily survive mild frost, each stalk producing two irresistible supersweet 8" ears throughout the growing season. Harvest a week or more ahead of the competition at 72 days after planting. Sh2.
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Order: 1 Pkt. (200 seeds)
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Order: 1 Pkt. (800 seeds)
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Product properties

Type Some flowers and vegetables fall into subcategories that may define how they grow (such as pole or bush), what they are used for (such as slicing tomatoes or shelling peas), flower type, or other designations that will help you select the type of a class of plant that you are looking for.


Days To Maturity The average number of days from when the plant is actively growing in the garden to the expected time of harvest.

71-73 days

Fruit Size The average size of the fruit produced by this product.

7-8 inches

Sun The amount of sunlight this product needs daily in order to perform well in the garden. Full sun means 6 hours of direct sun per day; partial sun means 2-4 hours of direct sun per day; shade means little or no direct sun.

Full Sun

Spread The width of the plant at maturity.

12 inches

Height The typical height of this product at maturity.

5-6 feet

the burpee




since 1876


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Growing Fresh Summer Corn
Growing Fresh Summer Corn
Eating fresh sweet corn is one of the greatest delights of summer. See how easy it is to grow your own.
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Chef Ian Knauer Recipe - Raw Corn Salad
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  • Corn

    Start Indoors Start Indoors Starting seeds indoors is called Indoor Sow or Indirect Sow and these dates are when to sow seeds indoors in the spring or summer
    Transplant Transplant When to transplant bulbs or roots in the garden for spring
    Start Outdoors Start Outdoors Starting seeds outdoors is called Outdoor Sow or Direct Sow and these dates are when to sow seeds outdoors in the spring or summer
    Start Indoors Fall Start Indoors Fall Starting seeds indoors in the fall called Indoor Sow or Indirect Sow and these dates are when to sow seeds outdoors in the fall
    Transplant Fall Transplant Fall Transplant Fall-When to transplant bulbs or roots in the garden for fall
    Start Outdoors Fall Start Outdoors Fall Starting seeds outdoors in the fall is called Outdoor Sow or Direct Sow and these dates are when to sow seeds outdoors in the fall
    S S Succession Planting This means that the plants have multiple harvests in a season
    First Date: May-02 - Last Date: Jun-13

How to Sow

  • Growing corn is easy provided you have enough space and plenty of sun. Corn is wind-pollinated, so you need to plant in blocks to ensure pollination. You should have a minimum 10 foot by 10 foot area. The exception to this rule is ‘On Deck’ corn, which has been bred to grow in containers. If you are growing ‘On Deck’, choose a container that is at least 24 inches wide and deep and plant nine seeds evenly spaced.
  • Corn is classified as Sh2, SE, SU, or SY. These refer to the sweetness and how long the corn may be stored. Sh2 is is supersweet, lasts 4-6 days in the refrigerator and is more challenging to sow in cool soils; SE is sugar-enhanced and lasts over a week in the refrigerator; SU is normal sugary, more cool soil tolerant but with a shorter shelf life; SY combines SE and Sh2 traits. Isolate Sh2 corn varieties from others by planting seeds at least 250 feet apart, or select varieties that mature at least 2 weeks apart, so they will not cross pollinate.
  • When choosing a site for corn, plant on the north side of your garden so the tall plants do not shade other plants in your vegetable garden.
  • Corn is a warm season crop and should not be planted in cool soils. The non Sh2 varieties tend to be more tolerant of cool soils, but in general the soil should be about 65 degrees F or warmer.
  • Sow corn seed 1 inch deep, 5 to 6 inches apart in rows 2 to 3 feet apart.
  • Seedlings emerge in 7-14 days.
  • When corn seedlings are 3-5 inches tall and healthy, thin to 1 foot apart.

How to Grow

  • Keep weeds under control during the growing season. Weeds compete with plants for water, space and nutrients, so control them by either cultivating often or use a mulch to prevent their seeds from germinating.
  • Keep plants well watered during dry periods to promote uninterrupted growth. Corn needs 1-2 inches of rain per week for best production. Use a rain gauge to check to see if you need to add water. Corn is also a heavy feeder and will benefit from side dressings of fertilizer applied as directed through the growing season.
  • Monitor for pests and diseases. Check with your local Cooperative Extension Service for pest controls recommended for your area.
  • Suckers tend to form at the base of the plants; they help support the stalks and make food for the plant. The stalks may have to be staked in windy areas, but in general they are self-supporting.
  • Sunflowers are good companion plant for corn. Direct sow sunflowers in rows parallel to corn rows to help separate corn varieties that need isolation from each other. Choose sunflower varieties of comparable height to the corn plantings. The sunflower border, with vibrant hues in russets to golden-yellow, will add sparkle next to the almost all-green corn plot. The ‘Three Sisters’ (corn, bean and squash) are traditional companion plantings with Native American gardeners.

Harvest and Preserving Tips

  • Ears of corn are ready to harvest about 17-20 days after the silks appear. The kernels should be firm. Open an ear and pierce a kernel with your fingernail. If the liquid is watery, the corn is not ripe yet. It should be milky. If it is creamy, it is overripe and will not taste as sweet.
  • Firmly grip the ear and twist downward to harvest. Take care not to break the plant when harvesting the first ear, or the second ear will not develop. Most corn produces two ears.
  • Store unhusked corn in the fridge and consume as soon as possible. Sh2 and SE varieties keep the longest in the fridge, up to one week.
  • Corn freezes well after blanching and may also be canned using a pressure cooker. Immature ears may be pickled.
Days To Maturity
71-73 days
Fruit Size
7-8 inches
Full Sun
12 inches
5-6 feet
Sow Method
Direct Sow
Planting Time
Sow Time
After Last Frost
9 inches
Corn, King Kool Hybrid is rated 4.1 out of 5 by 12.
Rated 3 out of 5 by from Sweet Corn I planted this variety of corn, and they seems to be growing well. Each stalk only had one ear of very small corn. They each appeared to be 4-5 inches in length. The corn itself is very sweet.
Date published: 2019-08-14
Rated 5 out of 5 by from Great Corn! Last year (2017) we purchased these seeds and had great results. We got a good size ear of every stock. The taste was as good as i have ever had. It is an awesome option for Zone 6.
Date published: 2018-02-07
Rated 1 out of 5 by from King Kool corn I was terribly disappointed in this seed. Planted first week in may, it came up beautifully and I will say probably every seed. By 4th of July it was better than knee high. Tasseled out great. I thought wow gonna be a bumper crop! Waited and waited. First few ears were just "ok". Not nearly 8", more like 3-4. Spotty kernel development. From 800 seeds I may have gotten 30 ears. Development just stopped. It was sweet, what I managed to harvest. Noted lucky if I got one ear per plant. The rest of my 1300 sq ft did spectacular. I love burpee seeds etc but this corn was disappointing. I'll buy a different seed next yr.
Date published: 2016-09-28
Rated 5 out of 5 by from Amazing corn This is nothing short of spectacular, truly. I dropped 49 seeds, 10 did not germinate so put in new seeds in the same spot and they all grew. I grow everything in raised beds here and filled up a 4' x 8' bed with 7 rows with 7 stalks in each. I think I might have tried it too early. Anyway, all grew just fine and picked 6 ears yesterday. Cooked them up and had them for dinner last night. They may have been the sweetest corn I have ever eaten. I was picking them off still raw and all you taste is sugar. Spectacular taste and I highly recommend this variety.
Date published: 2015-07-20
Rated 5 out of 5 by from Every bit as good as described I planted King Kool two weeks before and right beside my Burpee's Ambrosia patch, in four 40' rows. I planted the seeds about a foot apart and never did get around to thinning; the only thing that caused was a bigger harvest. I really don't recommend planting that close together for everyone because I am bless with exceptional alluvian soil and long hot summers with an abundance of sunshine, just what corn needs. Although it is supposed to be about the same time to maturity as the Ambrosia, they came in together. Wow! gave me a busy time getting them all harvested before they got too full, but I needn't have worried because; although it took a little over two weeks to harvest and process, the ears were still as tender and sweet at the end of harvest as they were at the beginning. We had a terrible wind storm here in Kansas, imagine that, that laid about half of both crops on the ground just as it was beginning to pollinate; no problem, I didn't lose a single ear, and all were fully developed showing that complete pollination occurred. Plants were 6'-7' tall with ears 10" long for the primary and 8" for the secondary. Flavor was exceptionally sweet, but not in the class with Burpee's Ambrosia. Since we have a warm early spring and long hot summer, I think I will stay with the Ambrosia, but I strongly recommend The King Kool for anyone with a late spring or short summer. You will be more than pleased with the hardiness and the satisfying sweet, corn flavor that you've waited for all winter.
Date published: 2014-10-06
Rated 4 out of 5 by from Great Flavor Ears were small and harvest was late (planted memorial day, harvest 9/7/14) but flavor was amazing. Very sweet corn, best I've tasted this season!
Date published: 2014-09-09
Rated 1 out of 5 by from Kool KIng This corn is sweet but I am at day 83 and have had 1 ear and the ears are very tiny still not a good grower in my eyes.
Date published: 2013-07-11
Rated 5 out of 5 by from Good producer Planted a patch of King Kool in 2012 from leftover 2011 seed. Good propagation and had plenty for fresh eating and to freeze.
Date published: 2013-04-02
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