Weeds Not Wildflowers: Late Summer Edition

Amb_triInvasives are everywhere! This is a selection of what’s blooming now or is about to flower that may resemble wildflowers, but should be controlled in natural areas.


Common and Giant Ragweed (Ambrosia artemisiifolia and A. trifida)

Common Ragweed is a short annual at around three feet with ferny foliage and a greenish yellow flower spike. Each plant produces 3,500 seeds per year. Giant Ragweed can range from three feet up to 10 feet tall! Its large mid-green leaves are lobed in patterns of three or five. Firm flower spikes are yellowish green and form at the top of the plant for maximum wind dispersal. Each plant can produce up to 10,000 seeds. Ragweed is the bane of allergy sufferers in late summer and early fall with its copious pollen release. Read More…

Weeds Not Wildflowers: Summer Edition

Summer - 20 (2009). Conium maculatum. "Conium maculatum"
Poison Hemlock

The battle against invasive weeds never ends. This is a selection of what’s blooming now that may resemble wildflowers, but should be controlled in natural areas.

Poison Hemlock (Conium maculatum)

Poison Hemlock, a biennial, is blooming with clusters of flat white flowers atop tall purple-blotched stems. A member of the parsley family, it has lacy compound leaves. A single plant may form upwards of 38,000 seeds. This plant is poisonous if ingested and was the hemlock used to poison Socrates. Read More…

Weeds Not Wildflowers

Garlic Mustard
Garlic Mustard

Have you seen these weeds? These aggressive invaders are blooming along roadsides, in forest preserves, and in your own backyard. They are not native wildflowers and can smother our desirable species. Don’t let them get a toehold on your property. We can help! Share this so we can spread the word about invasive species.   Read More…

Weed Control for Fall

buckthorn removalWeed species are sturdy, pernicious, and can move quickly. This autumn let us help you get on top of the weed war with fall invasive species control. For some species, autumn is a good time to get in and clean out.

It’s not too late to win against common reeds (Phragmites australis) and cattails (Typha sp.), but herbicide treatments must be applied while plants are still green. Fall applications can be particularly effective as plants draw their last nutrients into the roots. Ask us about prescribed fire as the second step to eliminate these invasive bullies. Open up your wetlands, rain gardens, bioswales, and drainage systems to a new level of native diversity. Read More…