How to Mulch for Weeds in Corn

Corn grows from seed planted directly in the garden. The plants require frequent irrigation and fertilization during the growing season. Competition from weeds prevents the corn from accessing all the water and nutrients in the bed. Water loss from evaporation during the hot summer months may also stress the corn plants. Mulching properly helps retain the moisture while preventing weed growth. The right type of mulch also warms early spring soils while preventing cool-season weeds from rooting in the bed before you plant.

Compost
Fertilizer
Plastic mulch
Straw mulch

Instructions

- 1
  Prepare the corn bed 4 weeks before your intended planting date. Till the soil and add any necessary compost or fertilizers to the bed.
- 2
  Lay sheets of black plastic mulch over the corn bed after preparing the soil. Overlap the edges of the sheets so there are no gaps. Place rocks on the edges of the plastic to hold it in place. The black plastic warms the soil quickly as it absorbs heat from the sun, allowing you to plant earlier and helping to ensure even corn germination.
- 3
  Remove the plastic prior to seeding the corn. Alternatively, cut planting holes in the plastic and leave it in place as you seed. The plastic may inhibit moisture and fertilizer penetration to the soil, so it is frequently removed before planting.
- 4
  Spread a 2- to 3-inch layer of straw mulch over the bed once the corn seedlings are 6 to 8 inches tall. The straw mulch suppresses weed growth and helps keep moisture in the soil.

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