Gardening in the Zone: African Violets

Gardening in the Zone segment featuring African violets, from Iowa State University Extension and Outreach.

Gardening in the Zone: Controlling Ground Ivy

Richard Jauron, Iowa State University Extension & Outreach Horticulture specialist, discusses ways to control ground ivy (aka Creeping Charlie) in your yard.

Gardening in the Zone: Miniature Roses

James Romer discusses the advantages of planting miniature roses in your garden.

Gardening in the Zone: Growing Christmas Trees

ISU Extension forester Paul Wray talks about how to grow Christmas trees in Iowa in this 2004 Gardening in the Zone segment.

Gardening in the Zone: Starting Seeds Indoors

Richard Jauron discusses how to start your garden seeds indoors to get a jump start on your garden.

Gardening in the Zone: Lilacs

Dr. Cindy Haynes, horticulture specialist with Iowa State University Extension and Outreach, discusses the varieties of lilac bushes and how to properly prune them.

Gardening in the Zone: Overwintering Geraniums

Richard Jauron, ISU Horticulture Specialist, discusses the different ways you can overwinter your geraniums.


The bagworm caterpillar lives its entire life inside a tough protective case made of silk and camouflaging bits of foliage. Each caterpillar makes its own bag that it carries around as it feeds with the head and legs sticking out the open, top end of the bag.  As the caterpillar eats and grows the bag is enlarged until by the end of the summer, what started as tiny pods only one-quarter inch long will have grown to almost 2 inches in length.

Pine Wilt

Image of pine wilt on a Scotch Pine
Pine wilt on a Scotch Pine

Overview of pine wilt 

Pine wilt causes rapid wilting and dying of pine trees, particularly Scots (Scotch) pines. Pine wilt is particularly common in scotch pines but is capable of infecting other non-native pines as well.

Rhizosphaera Needle Cast

Rhizosphaera needle cast is the most common disease on spruce trees that is received in the Plant and Insect Diagnostic Clinic. Rhizosphaera needle cast is caused by fungal pathogens within the genus Rhizosphaera. This genus also infects several conifer species including; fir, cedar, spruce, and pine