Lawn Weeds in New Jersey: Identifying Common Types Monday, February 02, 2026

In New Jersey, several common types of lawn weeds can be identified. Crabgrass is a low-growing weed with coarse leaves that spreads quickly. Nutsedge is a grass-like weed with triangular stems and yellowish-green leaves. Black medic is a clover-like weed with small yellow flowers. Poa annua, also known as annual bluegrass, is a light green grass that forms dense patches. Dandelions are easily recognizable with their bright yellow flowers and fluffy seed heads. These weeds can be controlled through regular weed control treatments.

Crabgrass

Crabgrass is a common lawn weed in New Jersey that can be identified by its low-growing habit and coarse leaves. It is an annual weed that spreads quickly and can form dense patches in lawns. Crabgrass is most prevalent in the summer months and can tolerate a wide range of soil conditions. To control crabgrass, it is important to maintain a healthy lawn by mowing at the correct height, watering deeply and infrequently, and applying pre-emergent herbicides in the spring to prevent the seeds from germinating.

Nutsedge

Nutsedge is a grass-like weed that can be identified by its triangular stems and yellowish-green leaves. It is a perennial weed that spreads through underground tubers, making it difficult to control. Nutsedge thrives in wet or poorly drained areas and can quickly take over a lawn if not managed. To control nutsedge, it is important to improve drainage in the affected areas and regularly mow the lawn at the correct height. Herbicides specifically designed for nutsedge can also be used to help control this weed.

Black Medic

Black medic is a clover-like weed that can be identified by its small yellow flowers and trifoliate leaves. It is an annual weed that spreads through seeds and can form dense patches in lawns. Black medic is most prevalent in the spring and early summer and can tolerate a wide range of soil conditions. To control black medic, it is important to regularly mow the lawn at the correct height and remove any weeds before they have a chance to flower and set seed. Herbicides specifically designed for broadleaf weeds can also be used to help control black medic.

Poa Annua

Poa annua, also known as annual bluegrass, is a common lawn weed in New Jersey that can be identified by its light green color and dense growth habit. It is an annual weed that spreads through seeds and can quickly take over a lawn if not managed. Poa annua is most prevalent in the spring and fall and can tolerate a wide range of soil conditions. To control poa annua, it is important to maintain a healthy lawn by mowing at the correct height, watering deeply and infrequently, and applying weed control treatments.

Dandelions

Dandelions are a common lawn weed in New Jersey that can be identified by their bright yellow flowers and fluffy seed heads. They are perennial weeds that spread through seeds and can quickly take over a lawn if not managed. Dandelions are most prevalent in the spring and early summer and can tolerate a wide range of soil conditions. To control dandelions, you'll want to use a combination of pre- and post-emergent weed control treatments.

Give us a call today to schedule our weed control service.

At Stream Line Lawn & Landscape, we understand the importance of keeping your lawn weed-free and healthy. That's why we offer our weed control service, which includes both pre- and post-emergent treatments. Our team will visit your property multiple times throughout the year to apply these treatments and ensure that your lawn stays weed-free. We'll also apply fertilizer treatments to provide your lawn with the nutrients it needs to thrive. We offer our weed control service to property owners in Westfield, NJ, and nearby areas like Watchung and Warren. Give us a call today at (833) 452-9666 to schedule our weed control service and keep your lawn looking its best.