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Michigan State University Extension
Ornamental Plants Plus
http://www.msue.msu.edu/imp/modzz/masterzz.html
Landscape Alert Newsletters
http://www.ipm.msu.edu/land-cat.htm
MSU Extension Service--Information
Access Center
http://www.msue.msu.edu/iac/iacmain.html
MSU Turf Weeds
www.msuturfweeds.net
Ohio State University
Webgarden
http://webgarden.osu.edu/
Ohioline
http://ohioline.osu.edu/lines/hygs.html
Other University Resources
Cornell University Gardening Resources
http://www.gardening.cornell.edu
North Carolina State University: Plant Fact Sheets
http://www.ces.ncsu.edu/depts/hort/consumer/factsheets
Rutgers Extension
http://www.rce.rutgers.edu/pubs/subcategory.asp?cat=5&sub=1001
University of Illinois Extension:
Hort Corner
http://www.urbanext.uiuc.edu/hort/index.html
University of Maryland
Plant Diagnostics
http://plantdiagnostics.umd.edu
University of Minnesota Extension
Service
http://www3.extension.umn.edu/topics.html?topic=5
University of Missouri Extension
http://muextension.missouri.edu/explore/agguides/hort/index.htm
University of Wisconsin Cooperative Extension
http://infosource.uwex.edu/subheads.cfm?headingid=2
Hort Source
http://www.hortsource.com/index.htm
National Plants Database
http://plants.usda.gov/
Heat Zone Map from the American Horticultural Society, www.ahs.org/publications/heat_zone_map.htm
Site has a zip code zone finder to easily determine your garden's heat zone and choose plants accordingly. The heat zones complement the well-known system of USDA Hardiness Zones.
Frost Dates Selector, http://www.victoryseeds.com/frost/mi.html
Shows average dates for first and last frosts for selected cities in Michigan. (Site also includes other U.S. states and Canada.
Plant Hardiness Zone Map from the USDA, http://www.usna.usda.gov/Hardzone/ushzmap.html
Use this map for information about your hardiness zone, which is one guide to indicate a plant's ability to withstand an average minimum temperature.
Master Gardener Society of Oakland County
http://www.mgsoc.org/
Emerald Ash Borer
http://emeraldashborer.info/
http://www.hrt.msu.edu/ash.alt
Bug Guide
http://bugguide.net/node/view/15740
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Northern Gardening
