Weed Identification and Management

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Updated: October 13, 2021

Weed Identification Photos

Identify common Maryland weeds by growth habit.
flowering ground ivy
Updated: September 1, 2021

Fall Weeds

Weeds commonly found in lawns and gardens in the fall
common ragweed
Updated: October 6, 2021

Quackgrass

Identify and manage quackgrass weeds.
quackgrass
Updated: October 5, 2021

Vinegar: An Alternative to Glyphosate?

Pros and cons of vinegar as an alternative to glyphosate
Updated: October 5, 2021

Iron-based Herbicides

An examination of the efficacy of iron-based herbicides. These selective, broadleaf herbicides contain the active ingredient chelated iron.
Updated: September 29, 2021

Bradford Pear

How to identify and manage invasive 'Bradford' pear trees.
Invasive Bradford pear trees in bloom with white flowers
Updated: September 9, 2021

Wild Violet

Identify and control wild violets in the lawn.
wild violet
Updated: September 1, 2021

Summer Weeds

Common summer weeds in lawns and gardens
curly dock left, burdock right
Updated: August 19, 2021

Poison Hemlock Identification and Management

Poison Hemlock (Conium maculatum, Fig. 1), is a member of the plant family Apiaceae, which contains a few important crops such as carrots, celery, and parsnips. This weed is a tall, invasive, and highly poisonous weed that is sometimes mistaken for one of its crop relatives. It is also commonly mistaken for Queen Anne's Lace (Daucus carota).
Figure 1. Poison hemlock (Conium maculatum) inflorescence.
Updated: August 16, 2021

Dallisgrass

Identification and management of dallisgrass weeds.
dallisgrass