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Arthropods, including plant pests and biocontrol agents, are often difficult to identify with the naked eye.

Hydrangeas are one of the most popular flowering shrubs for many reasons.

Parrotia persica, also known as Persian ironwood, is native to a relatively small region of northern Iran and Azerbaijan, near the southern edge of the Caspian Sea.

Lacebark pine, Pinus bungeana, is native to eastern and central China.

Creeping buttercup is a stoloniferous plant that spreads through thin turf, forming patches in lawns and parks.

Cut flower pest, disease, and production update for Pennsylvania growers.

Bull thistle (Cirsium vulgare) is a biennial that, true to its name, has notable spines. This plant is much different than Canada thistle.

Sandy Feather, extension educator in Allegheny county, has prepared this list of trees, shrubs, annuals and perennials that don't just survive but will thrive in our long, hot summers.

American yellowwood, Cladrastis kentukea, is a great shade tree and a lovely flowering tree.

Picturesque may be the first word that comes to mind when describing the Japanese white pine, Pinus parviflora.

Beneficial insects are those that consume or parasitize insect pests.

Cut flower pest, disease, and production update for Pennsylvania growers.

Japanese honeysuckle is an invasive, non-native climbing vine.

Annual fleabane, also called daisy fleabane, is a common and fast-growing broadleaf weed found in Pennsylvania lawns and other low maintenance turf areas. Its common name comes from folklore claiming dried plant material will repel fleas.

Wild onion (Allium canadense) and wild garlic (Allium vineale) are perennial plants that can be a weed in turfgrass and landscape beds.

Yellow woodsorrel (Oxalis stricta) has foliage (composed of three leaflets) that resembles white clover or black medic.

Prostrate knotweed (Polygonum aviculare) is a summer annual.

Poison hemlock (Conium maculatum) appears to have become more abundant over the past few years.

Getting to the bottom of a plant problem can be a challenge.

Extension professionals and pesticide industry representatives consistently reminded growers to read the pesticide label thoroughly and observe all precautions listed on the label.

A weed that has been spreading in recent years in the nursery and landscape trade is mulberry weed.

Common field speedwell is a common weed of home lawns, parks, institutional grounds, and golf courses in Pennsylvania.

Horseweed (Conyza canadensis), also known as marestail, reproduces by seed.

Goosegrass (Eleusine indica) is a summer annual grass with a very recognizable growth habit.

Cut flower pest, disease, and production update for Pennsylvania growers.