It is starting to make its ugly appearance in our lawns.

This grassy weed is very noticeable in lawns.

It grows rapidly, and is very noticeable when growing in a fine textured, dark green turf such as Fescue or Kentucky Bluegrass (cool season grasses).

It was introduced to the U.S. in 1849 as a potential forage crop, and can be a problem on golf courses, athletic fields, lawns and gardens.

Crabgrass is an annual weed and is one of the most troublesome weeds in lawns.

It produces from seeds, and an individual plant can produce about 150,000 seeds.

Seeds germinate primarily in the spring, grows throughout summer, produces seeds in the fall and dies following the first frost.

The most effective way to control crabgrass (and other weeds) is to create a dense, healthy turf.

A healthy lawn will compete with weeds and help prevent its establishment.

Proper mowing, watering, fertilization and insect control will help ensure a thick, healthy turf.

A pre-emergent herbicide can be applied before the crabgrass seeds germinate.

The seed will germinate when soil temperatures exceed 55 degrees for four consecutive days.

Generally, the herbicide should be applied in mid-March.

Depending on the herbicide used, it will provide protection for three to four months.

The herbicide needs to be watered in within several days of application or it will not help control weeds.

Do not seed your lawn if you plan on using a pre-emergent herbicide.

It cannot tell the difference between ‘good’ or ‘bad’ seed.

A pre-emergent does not kill the seed, but kills the seedling upon germination if applied correctly.

A pre-emergent herbicide will not be 100 percent effective, especially on new or thin lawns, so a post-emergent will likely be needed too.

For best control, apply to crabgrass plants as soon as they emerge.

Larger plants may need additional applications for control. Always follow label instructions.

More is not better, and if over applied may damage your lawn as well.

In addition to herbicides, cultural controls can also minimize crabgrass in your lawn.

Mow at a height of 2.5 to 3.0 inches.

Mowing lower will increase crabgrass infestation.

Most weed seeds (grassy or broadleaf) need sun and warmth to germinate.

A higher, thick turf will keep the soil cooler and shaded.

Water deeply and infrequently and only when grass shows signs of drought stress.

Frequent, light watering will encourage crabgrass.

Do not apply fertilizer in the summer.

Crabgrass benefits more from fertilizer in the heat of summer than Fescue and other cool season grasses.

Crabgrass is an unsightly weed and difficult to control.

Be persistent.

You can control this weed over time and improve the appearance of your yard.

Donn Hoffmann can be reached at grasshopperturfcompany@yahoo.com or 615-971-6780.