Chase Research Gardens - Site developed by Chase Research Gardens and describes their research and advisory services.

Hortimarc - Site developed by Hortimarc and describes their marketing research services.

Plant Health Advisory - Site developed by Dr. Chuck Powell and covers his professional services.

Plant Management Network - Site developed by The Plant Management Network and it a not-for-profit (an annual subscription fee is required) resource related to IPM systems.

Scotts - Site developed by Scotts and describes their testing services and nutrition products.

Virtual Herbarium of the Chicago Region - Site developed by three Chicago-land botanical gardens to assist in identifying plants.