Here at Evergreen Turf, we get a lot of questions from people about home lawns and gardens. One question that is asked is, “What is the difference between grasses and weeds?”

Let’s look at an example of why this question gets asked. Let’s say you have a beautiful lawn that is comprised of St. Augustine sod. But then one day you see a few spots on your lawn where weeds are coming through. The species doesn’t look like the same type as the sod you use in your lawn, but it does look like grass. Upon further inspection, you determine that it’s bermudagrass.

You see, bermudagrass is a plant that, like St. Augustine sod, is commonly grown as turfgrass, but it also can be an invasive weed in certain situations. That’s why people ask what the difference is between grasses and weeds.

Related: Weed Control in St. Augustine Grass

The Primary Difference Between Weeds and Grass

The first thing you should know is that weeds are a general term for plants that grow in unwanted areas in a lawn or garden. This means that any plant you don’t want growing in your lawn or garden is a weed. Weeds come in different shapes and sizes, and many different types of plants including flowers and invasive grass species can be considered weeds.

There are two main categories of weeds—broadleaf weeds (dicots) and grassy weeds (monocots). Broadleaf weed examples are purslane, spurge, and dandelions. Grassy weed examples are crabgrass, goosegrass, and the hard to kill nutsedges.

On the other hand, grass is simply a category of plants. Scientists refer to them as belonging to the Poaceae family of plants. You can easily distinguish grass from other plants by their tender green stems compared to other plants that have woody stems that sprout out branches and from those branches, sprout out the leaves and flowers.

According to Britannica, “With more than 10,000 species, the grass family, Poaceae, is one of the largest families of flowering plants. Its members are monocotyledons and feature leaves with parallel veins; the flowers are usually wind-pollinated. Many grasses are cultivated as ornamental plants and for lawns, and several are staple cereal crops.” Check out their list of some of the major species in this family, which include Bermuda grass, Rye and others popularly used as grass for home lawns.

If you’re looking for grass for your home lawn, check out our varieties of sod that grow well in Arizona, including Midiron, Tifway 419, Tifgreen 328, TifGrand, Palmetto St. Augustine, and TifTuf. See a description of each one and order now on our website.

So now you know that grass is generally a specific plant from the plant kingdom and weeds are a general term for plants that grow where you don’t want them to grow.

Fun Facts About Grass

As we have mentioned, there are over 10,000 named species of grass. But did you know that they are also an important part of human life, primarily as a food source? You might be surprised to know that rice, wheat, and other grains are part of this family, as is bamboo.

Grass also cools the general surroundings safely and naturally and improves the air quality around your house. You should also know that a well-kept lawn generally increases the value of a home by upwards of 10%. If you plan to get more value out of your home, you should consider installing a sod lawn.

How to Prevent & Get Rid of Unwanted Weeds in Your Lawn and Garden

Weeds are a nuisance because they disrupt the general beauty and appeal of a well-curated lawn and garden. If not dealt with and removed properly, they can embed themselves firmly and eventually cause damage to your lawn or garden as they grow.

Your first defense against weeds in your sod grass is a healthy lawn. Fertility, irrigation, and consistent mowing are necessary for a thick dense lawn. Thick dense sod will keep weeds from ever getting started in your lawn. Any time your lawn becomes thin or stressed, the sod will begin to lose density and allow room for competition. Weed seeds are opportunistic, sitting idly by until given a little room and a little sunlight to allow them to start growing.

Weeds reproduce primarily from seed. Because most weeds are very prolific seed producers, there is usually an abundance of weed seed in any lawn just waiting for the right conditions to begin growing and competing with your lawn for space. Some weeds however, such as common bermudagrass, reproduce from runners that can grow above ground or below ground. The runners start new plants at intervals, sending down roots and then shoots, potentially taking over an entire area very quickly.

Weed control can be accomplished in two ways;

1. pre-emergently (before the seeds germinate) or
2. post-emergently (after the weeds have sprouted and emerged from the ground).

Applications of pre-emergent herbicides must be timed before conditions are right for the weeds to begin germinating. Post-emergent herbicides can be applied anytime after the weeds have emerged, but the younger the weeds the more effective the herbicides will be. Many post-emergent herbicides can damage your lawn if applied at the wrong rate or the wrong time. Please read the directions carefully before applying any chemicals to your sod grass lawn.

For more information on how to properly care for your sod lawn, check out our lawn care section of our website.

To purchase sod in Phoenix and Tucson, check out our sod varieties and order now.