Sweet Corn
Few garden moments rival the first bite of sweet corn pulled minutes from the stalk, sugar still at its fleeting, summery peak.
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Identify a Sweet Corn in Rooted and share it, and yours could become the field guide image.
Summer's Sweetest Countdown
Sweet corn is a domesticated grass that has been cultivated in the Americas for thousands of years, bred over generations to maximize the natural sugars in its kernels. Modern varieties fall into three main groups - standard sugary (su), sugar-enhanced (se), and supersweet (sh2) - each differing in sweetness intensity and how quickly those sugars convert to starch after harvest. That conversion is the reason homegrown corn, eaten the same day it's picked, tastes so dramatically better than anything from a store shelf.
A tall, architectural plant reaching 5-8 ft, corn produces separate male flowers (the tassel at the top) and female flowers (the silks emerging from each ear). Wind carries pollen from tassel to silk, and each silk strand corresponds to one kernel - miss a strand and you get a gap in the row. This is why corn is always planted in blocks rather than single rows: good pollination depends on dense planting and sheer volume of airborne pollen.
Planting & care
Direct-sow seeds 1-2 in deep once soil temperatures reach at least 60 F - corn does not transplant well and cold soil invites rot. Space seeds 9-12 in apart in rows 30-36 in apart, planting in a block of at least 4 rows for reliable pollination. Supersweet varieties must be isolated from standard types by at least 250 ft or timed so they do not tassel simultaneously, or cross-pollination will cause starchy, tough kernels.
Corn is a heavy feeder with notoriously shallow roots. Side-dress with a nitrogen-rich fertilizer when plants reach 12 in and again when tassels first appear. Water deeply and consistently - irregular moisture during ear formation leads to poor kernel fill. Mulch around the base to retain soil moisture and suppress weeds, but cultivate shallowly near the roots. Harvest when silks turn brown and dry, and a punctured kernel releases milky juice rather than clear liquid.
The Three-Day Rule
Standard sugary corn begins converting sugar to starch within hours of harvest - by day three off the stalk, a significant portion of that sweetness is gone. If you grow a supersweet (sh2) variety you gain a slightly longer window, but the golden rule still applies: harvest in the cool of early morning, and cook or refrigerate immediately. For the truest taste of summer, get the pot of water boiling before you even head out to pick.
How much sun does Sweet Corn need?
Sweet Corn grows best in full sun.
How often should you water Sweet Corn?
Give it about 1-2 in per week.
When is Sweet Corn ready to harvest?
Sweet Corn is usually ready in 60-100 days from seed, depending on variety.