There is also the herbicide quinclorac under the trade name “Drive”. This is now available to homeowners and sold by Ortho under the name “Weed-B-Gon MAX Plus Crabgrass/Grassy Weeds Control. It is a “Ready To Use” formulation, meaning it comes already pre-mixed. It contains other ingredients including 2,4-D and Dicamba to help control broadleaf weeds as well.
A preemergent must be applied before the crabgrass seeds germinate in spring. Again, it MUST be applied before they germinate with only one exception, the use of Dimension preemergent will kill the crabgrass at very early seedling stages. I will describe this in better detail below.
Consistent, weekly mowing to remove the seed heads before they mature will also go a long way to deter spread. If you have only a few plants growing in your lawn, try removing them by pulling them up. The plant has a fibrous root system, however, some plants will root at the nodes near the base of the plant.
Cultural Practices that Help Prevent Grassy Weeds
The shallow root system works in their favor by absorbing as much water as possible before it reaches the deeper rooted plants. Frequent, shallow watering will cause crabgrass to flourish at the expense of other grasses. Less frequent, deep watering is better for your turfgrass, but will not neccessarily hinder crabgrass growth.
Nimblewill Grassy Weed
Nimblewill is a grassy weed that resembles bermudagrass. It is most prominent when growing in cool season grasses. Find information on identification, growth habits, and control methods.
The preemergent herbicide label may list other broadleaf and grassy weeds that it controls. However, most are not very effective with broadleaf weed seeds.
The same herbicides labeled for crabgrass will work on many other grassy weeds, including foxtails. Preemergents are added to spring fertilizer and will be labeled “with Crabgrass Control” or “Crabgrass Preventer”, etc. Always check the label before using, however. Once the preemergent had been applied, moisture in the soil will activate it. Fertilizers need to be applied correctly in the amounts needed for your grass type and time of year. Scotts fertilizer brand as well as a few others are good homeowner fertilizers. Bargain brands may not give you the control over grassy weeds that you would like. Since fertilizer applicatons are based on the Nitrogen (N) needs of the grass you will need to know how much to apply. Click on the link for helpful information on Developing a Fertilizer Program.
The coarse leaves are a yellowish-green to a darker blue-green color. They can grow to 12 inches long and up to ½ inch wide. The leaves are flat and smooth. The widest part of the blade is at the base. The leaves have small silky hairs on the upper surface near the base.
- The best way to combat seed heads is to mow the lawn often and make sure the mower blades are sharp. We recommend mowing once a week at a height of 3-3 ½ inches and not bagging the clippings.
- We do not recommend lowering the mowing height of the mower to help control seed heads. Lowering the mowing height puts additional stress on the lawn and may also cause damage to vital structures of the plant, such as the crown.
- Proper fertilization is key. Properly fertilized lawns grow out of the seed stage of the grass life cycle faster. The grass becomes easier to mow and have a much neater lawn.
- Make sure the lawn is receiving the proper amount of water each week. The lawn should receive 1-1 ½ inches of water per week. The best time to water is between the hours of 12 am – 6 am. This keeps the turf growing at a good rate to help grow out the seed heads on the turf. We have great tips for a successful watering schedule on our website.
Seed heads can be different in shape and size depending on the grass species. The timing of seed head production in the grass life cycle varies from plant to plant. Some grass species produce seed heads very early in spring, such as Annual Bluegrass and Rough Stalk Bluegrass; while others may produce seed heads later in the season such as annual rye grass. Seed heads are attached to a stalk that stems from the center of the grass plant and resemble miniature wheat plants. How many seed heads are visible on the lawn at any given time depends on the grass varieties and time interval between mowing. Seed head production normally lasts for a period of 2-4 weeks. As mentioned previously, many homeowners commonly mistake seed heads for weeds but no need to worry, they’re just a part of the grass life cycle. If you want more information on weeds, click here for our blog about weeds and ways to control them.
Seed heads are a necessary step in the life cycle of grass and ensures the specie’s survival, therefore stressed areas of the lawn may generate a greater density of seed heads. Dry soil is a tell-tale sign of seed heads. Check the soil moisture in the turf and compare areas with and without seed heads. The drier sections yield more seed heads. Cool shaded areas where the water evaporation rate is much less may have less seed heads. Watering the lawn properly with an adequate amount of water each week is important to the turf’s appearance and health.
There is no way of controlling or preventing seed heads from occurring chemically in a lawn because it is part of the natural grass life cycle; however, there are ways to improve the appearance of the lawn while seed heads are growing.
Ways to manage seed heads in turf:
This picture shows what Annual Bluegrass seed heads look like.
Seed head production requires energy from the grass plant, potentially causing a temporary lightening in color. The turf looks stemmy due to seed stalks, and short-term thinning of the turf stand. All these temporary issues eventually correct themselves as the plants grow and enter the next step in the grass life cycle. The best way to ensure a speedy recovery is by enhancing growth through regular watering and fertilization.
One of the most common lawn care questions we receive each year is about a strange wheat like weed growing in lawns. Good news, it’s not a weed, but rather a seed head! A seed head is a normal part of the grass life cycle that occurs each spring in our area. All grasses produce seed heads at some point throughout the growing season, it’s the plants way to reproduce and ensure survival.
If you see plants that look like wheat in your lawn, no need to worry this is a normal part of the grass life cycle. The timing and amount of seed heads produced depends on grass varieties and environmental conditions. Proper watering and fertilization help improve the appearance of the turf while it’s producing seed heads and promote quicker recovery. If you are in our service area and have any questions about seed heads or your lawn in general, feel free to give us a call at 908-281-7888.