Asked June 26, 2020, 11:54 PM EDT
How much water should you use each day to adequately water corn without overwatering?
Lane County Oregon
Thank you for your inquiry.
"Over-watering" is commonly thought to mean 'watering too often.'
Instead, over-watering is defined as adding so much water that the soil is water-logged -- that is, soggy.
The goal of watering is to moisten the entire rootzone (deep and wide) with each irrigation, and repeating the irrigation often enough so that the plant doesn't wilt. Once a plant wilts, no matter how minor, the total yield is reduced.
No one can tell you how often to water because everyone's soil is different. Also, daily weather affects how rapidly the soil dries.
You will need to determine the need for water by watching your plants, by probing the soil with a trowel, and by keeping an eye on the weather. On average for vegetables, the soil should be moist to 8 or 10 inches deep.
"Supplement natural rainfall so the corn receives 1 to 1.5 inches of water per week. In the seedling stage, watering should be spread out over several days; in later growth stages, one deep watering per week is sufficient. Keep rows free of weeds as they compete with the crop and may harbor pests."
"Growing Sweet Corn in the Home Garden" has all the details you need. - http://pubs.cahnrs.wsu.edu/publications/pubs/fs104e/