To wage a successful war on garden weeds, it helps to know which weeds you are dealing with. For gardeners seeking weed-relief lifelines, here is a selection of 9 efficient weed ID resources worth checking out and perhaps using in combination:
Virginia Tech Weed Identification Guide
The most comprehensive online guide to US weeds with more than 600 different species. Search by common name or scientific name, both listed alphabetically. All entries have several good photos and most have excellent descriptive and cultural information.
Weed Photo Gallery from University of California
Comprehensive guide to 160 weeds commonly found in California, many of which grow elsewhere too. Here, users search for weeds by type (broadleaf, grass, sedge, aquatic), plant form, mature leaf characteristics or by name (common or scientific). Entries include detailed cultural information and most have photos of the seeds, seedling, flower, mature plant and seed capsule.
Weed ID from Preen
Preen, the leading maker of pre-emergent garden weed preventers, has totally retooled their online Weed ID tool. Geared to home gardeners, the new Weed ID offers multiple images of each weed, plus four different search options: common name, Latin name, grassy or broadleaf type, plus a state-by-state search feature which helps gardeners hone in on the specific weeds that are most likely to crop up in their own garden. Besides images, each weed’s ID offers key information plus solution-based products and videos. Easy-to-use and covering 115 weed species the site also includes links to top university weed resources, making it a good place for home gardeners to start.
New Jersey Weed Gallery from Rutgers University
A valuable resource identifying weeds commonly found in NJ, many of which grow in other regions. In this Weed Gallery, weeds can be searched in three ways: by common name, by Latin name, or by scanning through the thumbnail images. A thorough descriptive paragraph explains each weed’s unique characteristics and preferred habitat.
Prostrate Knotweed is best eliminaed
before it germinates.
To Image Gallery
Is This Plant a Weed? From University of Minnesota Extension
Gardener-oriented and user-friendly, this photo-identification tool features 75 weed species commonly found in Minnesota, many of which grow in other regions. Searchable by weed type, growing habit and supporting photos, each entry has several photos, a complete list of plant characteristics, notes on significance and a helpful list of similar-looking weeds. Entries are linked to recommendations for cultural and chemical control options.
Weed Science Identification from University of Illinois Extension
This guide lists 68 weed species by common name. While most entries have excellent photos, not all have supporting information. That’s okay: the big bonus here are weed photos so 3D, you want to reach out and pull them!
Weed ID Guide from University of Missouri
More than 400 weed species listed alphabetically by common or Latin name. Each entry features 4 to 8 photographs showing various stages of development. Descriptions are complete and indicate where the weed is typically found plus identifying characteristics. An expanded search option is available for weed-geeks who know whether a leaf is pinnately-lobed or palmately-lobed.
Weed Alert from PBI/Gordon Corporation
Oriented toward turf professionals, this guide to US weeds has some information that also applies to weeds in gardens. Select a region (Western, North Central, Northeast or Southern) to get a list of weeds by common name with an accompanying photo, cultural information, germination dates and control recommendations. Information on more than 170 weed species.
For weed pros and fanatics:
1200 Weeds of the 48 States and Adjacent Canada
Dr. Richard Old, president of XID Services and weed identification specialist for Washington State University and Extension, offers the ultimate comprehensive weed ID tool presented as an interactive DVD: 1200 Weeds of the 48 States and Adjacent Canada (http://xidservices.com/order). Cost is $49.95 plus $5 for shipping.
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