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Corn, Northern Xtra-Sweet Hybrid

Short Description

Early yellow sweet corn with 9" ears.

Full Description

No other early yellow corn combines a large 9" ear and great cool-soil vigor with Sh2 sweetness. Plant corn in blocks at least four rows wide for cross-pollination and well-filled ears. Plants grow to 5' high. For the best flavor, isolate Northern Xtra-Sweet from non-Sh varieties to stop cross-pollination. A packet contains 200 seeds, enough to plant four 15 ft. rows. Seeds are not treated.
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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.

67 days

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

9 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 feet

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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
67 days
Fruit Size
9 inches
Full Sun
12 inches
5 feet
Sow Method
Direct Sow
Planting Time
Sow Time
After Last Frost
12 inches
Corn, Northern Xtra-Sweet Hybrid is rated 3.8 out of 5 by 13.
Rated 2 out of 5 by from What Fertilizer for sweet corn? Northern Xtra-Sweet Hybrid I planted a small patch on May 27th, 2017. It set only 2 ears, on 2 stalks. I used 10-10-10 fertilizer soon after planting. I read recently that extra Nitrogen may be needed and should be added later after stalks start to grow. I would appreciate any comments regarding needed fertilizer.
Date published: 2017-08-14
Rated 3 out of 5 by from mixed emotions The corn is very tasty, it grows to the 5 ft. range. Only about 3/4 of the seeds sprouted so I didn't get a very good stand. I planted several plantings 3 to be exact and had the same problem with each planting. There seems to be a fungus that attaches itself to the ear of corn more on this variety than others that I have planted previously. One good part about this corn is that you can let it get a little older and have large kernels and still have a very sweet tasting corn. Another good thing is that it does not grow really tall so you don't have to worry about a storm with rain and wind blowing the corn over.
Date published: 2017-07-25
Rated 3 out of 5 by from Good flavor but on small side Stalks were shorter than the other varieties I planted and yielded about one ear per stalk. Flavor was good, but the ears were only 5-6 inches long.
Date published: 2016-09-16
Rated 5 out of 5 by from Best ever For northern climates this is the best corn we've tried. Tolerant of cool weather, fast growing, and extra sweet 9 inch ears.
Date published: 2016-09-15
Rated 4 out of 5 by from Great Producer This is my second year growing this variety & had great results! I started the seeds indoors in April, moved to the outdoor greenhouse in May, transplanted outdoors to the 8'x10' raised box in late May/early June. There was a total of 43 plants with 7-9 plants in a row with a total of 6 rows. There we 2 ears growing on every plant with over half with 3 ears per plant. I harvested a total of 73 ears by September 9th. 45 ears were 6-8" long & 28 were 3-5" long. I will definitely buy this again!
Date published: 2016-09-15
Rated 4 out of 5 by from good corn Last year I grew Golden Cross Bantam Hybrid corn, it was the worst corn ever. This year I grew Hybrid Northern Xtra-Sweet. Good corn I will definitely grow it again.
Date published: 2016-07-30
Rated 5 out of 5 by from My first corn success in the desert! Planted first week of March, had to take out 3rd week of May due to desert heat. Any prior corn attempts were wormy and all underformed, so this was a great harvest! I did take out some stalks that the ear felt empty and seemed to have worm dirt. Had four 10-ft rows. Used some of the mini ears in stir fry, worked very well. We have two sowing seasons for corn in the desert southwest, and I will be ordering more for the fall planting.
Date published: 2016-06-02
Rated 3 out of 5 by from Unexpected let down I purchased this corn because I read the reviews of getting 2 ears per stalk or more. I did get multiple ears on many stalks but unfortunately the flavor was lacking. It just wasn't as sweet as the delectable hybrid from the year prior. I'll have to settle with a smaller harvest but more flavorful.
Date published: 2015-10-29
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