| Name | Description |
| American Horticultural Society | Home page of this national association includes heat zone map, Master Gardener program information, youth gardening program materials and more. |
Citation Styles-Online! A Reference Guide to Using Internet Sources
| Examples of how to cite from APA, MLA, CBE and Chicago style manuals. |
| Invasive Species.gov | National Agricultural Library's resource rich site, focusing on plant and animal alien species that threaten native plants and animals. |
| Mid-Atlantic Regional Fruit Loop | Information on deciduous tree fruit production in mid-Atlantic region. Cooperating state universities include Virginia Tech, West Virginia University, the University of Maryland, Penn State, and Rutgers. |
| New Crop | Purdue's Center for New Crops and Plant Products. Look here for information about unusual crops. |
| Nuts And Bolts of College Writing | Overview of the major components of college writing, including useful sections on documentation with examples of MLA, CBE, Chicago and APA citation formats. |
| Organic Food Production | Overview, with links, from USDA |
| PennState Fruit Research & Extension Center | Includes Pennsylvania Tree Fruit Production Guide. |
| Tree Fruits: Apples, Pears, Sweet Cherries, Apricots, Peaches, Plums | From Washington State University, includes excellent links to production information. |
| Weed Identification Guide from Virginia Tech | Excellent photographs of common weeds. |