Purdue Garden Articles

The following news articles were written by Rosie Lerner, Extension Consumer Horticulture Specialist, Bev Shaw, Advanced Master Gardener, or by staff at White River Gardens in Indianapolis and are distributed to news media around the state by Purdue University Agricultural Communication Service.

Most Recent Articles

Pussy willow shrubs can thrive in well-drained soil


Q: I am writing about a pussy willow tree I planted in my backyard in early August 2018. I have wanted one for some time and found one on sale at a discount department store. It didn’t have much info on what it takes to grow by ponds or lakes. So, if you could give me any information, it would be appreciated. A: A number of willow shrub species are commonly called pussy willows, so […]


October Gardening Calendar


HOME (Indoor plants and activities) Keep poinsettia in complete darkness for 15 hours each day — for example, between 5 p.m. and 8 a.m. — for eight to 10 weeks until red bracts begin to show. Pot spring-flowering bulbs to force into bloom indoors. Moisten soil and refrigerate 10 to 13 weeks. Transfer to a cool, sunny location, and allow an additional three to four weeks for blooming. Houseplants, especially those grown outdoors during the […]


Time to Harvest Sweet Potatoes


  Although some folks may be sad to see summer coming to a close, many gardeners are looking forward to harvesting their sweet potato treasures. Sweet potatoes are warm-season plants that are very sensitive to cold temperatures. The tuberous roots should be harvested by the time frost kills the vines or soon thereafter. Sweet potato roots continue to grow until frost kills the vines. Roots can be left in the ground for a short while; […]


Blue spruce not a great choice for Hoosiers


Q: We have 5.5 acres with several hundred white pines, 7 blue spruce, and 2 red pines. Several of the blue spruce are dying. Several years ago, two started dying from the bottom up. We put evergreen spikes around them, and after a year or so they came back to normal. Presently some of the large ones are now dying from the bottom to the top. We put spikes around two large and one small, […]


Oedema Is a Corky Quirk


Plants that experience extremes in soil moisture may develop spots on their leaves, called “oedema” (also spelled “edema”). The spots may first appear as a blister or raised spot, particularly on the undersides of leaves, but may occur on the top side as well as on the stems. Eventually, the blister develops a rust-colored, cork-like scab. Oedema is most commonly seen in the greenhouse on ivy-leaf geraniums but also on pansies, jade, and other thick-leaved […]


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