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weeds with large seed pods

Unfortunately, tilling and cultivation seems to aide bindweed spread. Fragments of vertical roots and rhizomes as short as 2 inches can form new plants! Field bindweed also is very drought tolerant and once established is difficult to control even with herbicides.

Pigweed wins the title of most “problematic” annual weed. It has evolved traits that makes it a tough competitor, especially in broadleaf crops like soybeans and cotton.

13 Common Lawn and Garden Weeds

In gardens, you easily can control crabgrass by mulching, hoeing, and hand pulling when the plants are young and before they set seed. You also can control this weed with solarization. Several chemical herbicides are available but often aren’t necessary. Mulching with wood products (e.g. wood chips or nuggets), composted yard waste, or synthetic landscape fabrics covered with mulch will reduce crabgrass in shrub beds and bedding plants and around trees by blocking sunlight needed for its germination, establishment, and growth.

Is Purslane Edible?

Is Lambsquarters Edible?

If you’ve made it outside on a recent sunny day, you’ve probably noticed the abundance of flowers blooming in gardens, parks, forests, and throughout King County right now. Unfortunately, the noxious weeds are out there, too—many of them bolting, flowering, and even going to seed already.

First up, weeds already going to seed or getting close. Catch them now before seeds disperse!

1. Top priority: eradicate before seeds disperse

Below are some of the top regulated noxious weeds to keep an eye out for this month. Please let us know if you see one of these high-priority invasive plants, so we can make sure they’re controlled or eradicated in time! [Click here to go to the King County Noxious Weed List for the whole list!] Report locations and share photos with us easily on our new and improved Report a Weed online form.

Many garlic mustard plants in King County are going to seed. Note the long, skinny seed pods on this one.

Where It Grows: Fertile, sunny landscape and garden areas

Size: To 8 inches tall and 2 feet wide

Control: To prevent this weed, mulch garden beds in spring. Pull plants by hand or apply a postemergence herbicide once it grows.

Purslane

Appearance: When you’re identifying weeds in your garden, if you spot broad, flat, oval-shape leaves arranged in a low rosette, you’ve likely found a plantain.

Type: Broadleaf perennial

A weed can be any plant growing where you don’t want it to. However, there are some particularly weedy species to keep an eye out for. These aggressive plants not only make your yard look messy, they can also choke out the garden plants you’ve worked so hard to grow. Whether you’re trying to identify lawn weeds or garden weeds, this handy guide will help you identify more than 30 common weeds by photo, plus give you tips for how to best remove them.

Test Garden Tip: Clover adds nitrogen to the soil plus the flowers feed many pollinators so some gardeners use this plant to create a more environmentally friendly lawn.