Weed ID: Identifying & Conquering Pesky Weeds

Published by Bucks Country Gardens in Bucks Country GardensLandscapeLawn & GardenPlants

Lawn and garden weeds are a pesky task to conquer, even for the most seasoned gardener. However, if you know the proper way to treat each weed, you’ll be in better shape than your lawn! Identifying the weed is key to its control.

Top 7 Most Common Lawn & Garden Weeds:

 

1. CRABGRASS Digitaria spp

CRABGRASS Digitaria spp

Two species are found in turf grass in Pennsylvania, hairy and smooth. Both are summer annuals and have wide ¼” to ½“ sparsely hairy, pale, green leaves that taper to a point. Seeds germinate in the spring when soil temperatures are between 55º and 58º for several consecutive days. They die after the first fall frost.

Control: Use Ortho Weed B Gone Plus Crabgrass Control from emergence until 3”–4” in height. If pre-emergent, use Bonide Crabgrass Preventer Phase 1.

Organic: Espoma Organic Weed Preventer

 

2. CANADA THISTLE Cirsium arvense

CANADA THISTLE Cirsium arvense

This is a spreading rhizomatous perennial weed that produces pink or purple flowers in late June through September. After the first flower bud forms but before the first flower opens, it’s important to apply a post-emergent herbicide. While attempting to control this weed, avoid hand pulling or mowing since removing the shoots can stimulate growth. Apply in the fall.

Control: Use Round Up Weed Killer.

Organic: Bonide Burnout Weed/Grass Killer

 

3. YELLOW NUTSEDGE Cyperus esculentus

YELLOW NUTSEDGE Cyperus esculentus

While not a true grass, this weed is a member of the sedge family. You can easily spot this weed in your lawn by its erect triangular stems, and it is commonly found in damp to wet areas. The leaves and stems are a shiny, yellow-green color. The leaves and stems die in winter, but new growth occurs in spring and summer from nutlets that grow underground.

Control: Use Bonide Sedge Ender

Organic: No organic option available

 

4. NIMBLEWEED Muhlenbergia schreberi

NIMBLEWEED Muhlenbergia schreberi

This is a blue-green perennial grass that is commonly found in lawns during the summer. It grows rapidly during the summer months, turns brown or tan in winter, but stolons persist and re-sprout in spring. It spreads over existing turf and forms dense patches. This weed flowers from August to October.

Control: Use Round Up Weed Killer (Will kill lawn – Spot Treatment ONLY – Lawn needs over seeding in fall.)

Organic: Bonide Burnout Weed/Grass Killer (Will kill lawn – Spot Treatment ONLY – Lawn needs over seeding in fall.)

 

5. DANDELION Taraxacum officinale

DANDELION Taraxacum officinale

You may recognize the bright yellow flowers on top of long stems in the early summer months. Dandelions produce a second bloom in the fall. This weed produces a thick taproot that penetrates up to several inches into the soil.

Control: Use Bonide Weed Beater Ultra.

Organic: Bonide Burnout Weed/Grass Killer

 

6. GROUND IVY Glecoma hederacea

GROUND IVY Glecoma hederacea

This weed is a member of the mint family, has square stems, and is a low-growing, creeping perennial weed with broad leafs. It produces blue or purple trumpet shaped flowers. While it can grow in full sun, it is most common in shaded areas.

Control: Use Bonide Weed Beater Ultra.

Organic: Bonide Burnout Weed/Grass Killer

 

7. PROSTRATE KNOTWEED Polygonum aviculare

PROSTRATE KNOTWEED Polygonum aviculare

You’ll find this low-growing annual in the summer months. It has small white flowers, and the most distinct feature is the papery sheath at the base of each leaf. It is well adaptive to compacted soils, along sidewalks, and turf areas, and it is one of the first summer annual weeds to emerge. Apply when weed is growing actively.

Control: Use Bonide Weed Beater Ultra.

Organic: Bonide Burnout Weed/Grass Killer

Original post appeared on May 30, 2016. “Rid Your Lawn of Pesky Weeds!” by Jessie Tanski and David Jones.