Soils and Soil Management
- Offers a database and search function of a range of articles about fertilizers.
- http://web1.msue.msu.edu/msue/imp/modf1/masterf1.html

Know Your Soil: Applying Fertilizers on Your Home Garden
- University of Maine bulletin provides information on fertilizers to supplement nutrients in the soil.
- http://www.umext.maine.edu/onlinepubs/htmpubs/2287.htm

Fertilization of Lawns
- Details the benefits of and how to fertilize lawns.
- http://ohioline.osu.edu/hyg-fact/4000/4006.html

Fertilizing Landscape Plants
- Explains the necessities of fertilizing plants.
- http://ohioline.osu.edu/hyg-fact/1000/1002.html

Washington State Department of Agriculture
- Information on products and their content of heavy metals, along with fertilizer laws and label requirements.
- http://agr.wa.gov/

Fertilizer Application
- Debates whether to fertilize with organic or inorganic products.
- http://gardenline.usask.ca/misc/fertili2.html

Convenience Fertilizers For Home Landscapes
- Information on fertilizing shrubs and trees on home lanscapes.
- http://www.ext.vt.edu/departments/envirohort/factsheets2/fertilizer/sep90pr3.html

Extremely Green Gardening Company
- Online source for organic gardening products including fertilizers, biological pest control, soil test kits.
- http://www.extremelygreen.com

Fertilizing Woody Ornamentals
- Explains the best way to fertilize these types of plants.
- http://aggie-horticulture.tamu.edu/extension/fertilizing/fertilizing.html

Responsible Fertilizer Practices for Lawns
- Outlines general fertilizer practices, nitrogen and phosphorus requirements, and application timing for lawns.
- http://www.extension.umn.edu/distribution/horticulture/DG6551.html

Island Lawn and Garden
- Concise discussion about organic and inorganic fertilizing along with a number of lawn fertilization topics.
- http://www.ilg-mv.com/Pages/organicvs.html

Lawn Talk
- A range of lawn fertilizing articles beginning with "Choosing Fertilizers for Home Lawns".
- http://www.urbanext.uiuc.edu/lawntalk/lawntalk10.html