Sweet corn varieties for the home garden
Sweet corn requires more space than almost any vegetable to produce a meaningful harvest. A single row of 10 plants produces 10 ears -- which is about two meals. For home garden corn to make sense, you need space for at least 4 rows of 10--15 plants. Narrow rows set for garden aesthetics produce.
Sweet corn requires more space than almost any vegetable to produce a meaningful harvest. A single row of 10 plants produces 10 ears — which is about two meals. For home garden corn to make sense, you need space for at least 4 rows of 10—15 plants. Narrow rows set for garden aesthetics produce poor pollination and chaffy ears. Corn is wind-pollinated; pollen falls from tassels to silks, and that process works best in a block configuration rather than a single long row.
I don't grow corn at home. Space and deer pressure make it impractical. This guide draws on Penn State Extension and Cornell trial data.
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Sweet corn genetics: su, se, sh2
Per Cornell Cooperative Extension:
Sugary (su): Traditional sweet corn with sugar content 5—10% of kernel dry weight. Converts sugar to starch rapidly after harvest — best eaten within 24 hours of picking. 'Silver Queen', 'Golden Bantam', 'Butter and Sugar' are su types. The classic "farm stand" corn experience.
Sugar-enhanced (se): Modified sugary gene that increases sugar content to 15—20% and dramatically slows sugar-to-starch conversion — good flavor holds 3—5 days in refrigerator. 'Bodacious', 'Kandy Korn', 'Incredible' are se types. More forgiving than su for gardeners who don't cook immediately.
Supersweet (sh2): Shrunken-2 gene; sugar content 25—40%; flavor can seem too sweet for some palates; holds quality 5—7 days refrigerated. 'Sweetness', 'Illini Xtra Sweet', 'Jubilee Supersweet' are sh2 types. Critical requirement: sh2 corn must be isolated 250—300 feet from all other corn types or by 2-week staggered planting. Cross-pollination with su or se types produces starchy, poor-quality kernels. Seed germinates poorly in soil below 60°F.