Filtering by tag: horticulture ✕

pinnately compound leaves and seed clusters

Tree of Heaven Control Guidelines

There's a lot of interest in controlling tree of heaven. Art Gover at Penn State conducted numerous trials on this weed and summarized the information in a great fact sheet.I can sum up the control…

Weeds of the Northeast, 2nd edition book cover with feature bullets and plant photos

New Weed Identification Book Now Available

The newly revised Weeds of the Northeast 2nd edition is now available. WNE 2nd ed info slide 1 page This weed ID guide has been updated to include important weeds of the Mid-Atlantic States -- yes,…

photo of foliage, thick stems rooting at the nodes with subteranean flowers photo credit: J C Neal

Have You Seen Tropical Spiderwort?

Tropical spiderwort (Commelina benghalensis), a noxious weed, has been found in several landscape beds in Raleigh. See a fact sheet with photos and comparisons with the more common Asiatic dayflower:…

What’s That Pretty Weed? Ageratum

Ageratum conyzoides (tropic ageratum or billygoat weed) is a South American species that is now a common weed in nurseries and landscapes in the gulf coast states, and distributed as far north as…

close up of flower heads with salmon-red color

Have You Seen Thickhead in Your Garden?

No, I'm not talking about your brother-in-law. Thickhead or redflower ragleaf (Crassocephalum crepidioides) is an introduced weed that I'm observing with more frequency in nursery and garden centers…

2 week old plants are small. 4 week old plants fill the pots

Are You Hand Weeding Frequently Enough?

Want to reduce your labor costs for hand weeding container nurseries? The simple (but hard answer) is to hand weed more frequently! Common nursery weeds can reproduce rapidly with some species having…

What Is That Weed?

Japanese stiltgrass (Microstegium vimineum) is a summer annual grass common in the area woodlands, greenways, and shady lawns and landscapes. Its wiry stems can root at the nodes and climb over other…