For the backyard gardener who's into vegetables, there are few things better than fresh-picked corn on the cob. But getting your corn to the stage at which it can be picked and eaten takes a lot of work and unless your corn has the right nutrients, the cobs may not fully form and your backyard cobs may turn out to be a bit of a disappointment. One way to increase your chances of a healthy corn harvest is to properly fertilize your crop, and one way to do that is to spray your corn with a good liquid fertilizer.
Purchase a liquid 4-3-3 corn fertilizer. The numbers refer to the proportion of nitrogen (N), phosphorous (P) and potassium (K). If you have a backyard garden that is under an acre in size, you will need approximately 1 gallon or slightly less.
Mix the liquid fertilizer with water as per the manufacturer's directions (approximately 30 gallons of water per 1 gallon of liquid fertilizer) and put the mixture in a sprayer.
Spray the leaves and stems of your corn plants when they are 4 to 6 inches tall. Spray on a non-windy day and do not spray if rain is expected within the next 24 hours, as rain will wash the fertilizer from the leaves before it has had a chance to be fully absorbed.
Spray the leaves and stems of your plants again when they are approximately 18 inches tall. Allow at least 10 days between sprayings.
Spray a third time if desired just as your corn plants are beginning to tassel.