Denny's weekly column is in the Cincinnati Enquirer (Home Section). Here are past columns written:

03/23/13 Enquirer Article (Topic:
03/16/13 Enquirer Article (Topic:
03/09/13 Enquirer Article (Topic: New insecticide protects Ash trees)
03/02/13 Enquirer Article (Topic: It's March, so lets get growing)
02/23/13 Enquirer Article (Topic: New trees are pest and disease resistant)
02/16/13 Enquirer Article (Topic: New Azaleas beat cold, bloom longer)
02/09/13 Enquirer Article (Topic: Meet new Rose family members)
02/02/13 Enquirer Article (Topic: Lists for cleaning up the landscape)
01/26/13: Enquirer Article (Topic: No reason to panic if you're seeing foliage in winter)
01/19/13: Enquirer Article (Topic: Attracting wild birds is important to landscape)
01/12/13: Enquirer Article (Topic: New Elm Trees resist beetles)
01/05/13: Enquirer Article (Topic: Nows not the time to seed your lawn)