Category: Summer

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 […]


Gaping wounds likely a woodpecker’s work


Q. I saw these holes in my tree and am wondering what they are from. This tree is the only one I have seen them on. – M.S., Chesterton Some species of woodpeckers cause large holes in tree trunks. A. The holes are likely from woodpecker injury, but the tree may have some other issues. Has the tree been in a state of decline for a while? Perhaps branch dieback, leaf drop or other symptoms? […]

 Categories:

August Garden Calendar


Visit the Purdue Plant Info to Go/Purdue Master Gardener booth at the Indiana State Fair (Aug. 3-19.) Bring your gardening questions to the booth in the Purdue Extension Ag/Hort Building. HOME (Indoor plants and activities) Take cuttings from annual garden plants such as impatiens, coleus, geraniums and wax begonias to overwinter indoors. Root the cuttings in media such as moist vermiculite, perlite, peat moss or potting soil, rather than water. Order spring-flowering bulbs for fall […]


Perennials for Shady Gardens


Plants differ in their adaptability to different growing conditions. Sunshine is one of the most significant factors. We often think of light as being either sunny or shady, but, in fact, there are many “shades” of light in between. Your garden may experience light shade, such as that filtered through an overhanging tree; dense shade, such as that found in woodlands; or intermittent shade from an object, such as a building that blocks the sun […]


Eastern Red Cedars Volunteer Way Too Often


Q. I am wondering what you might know about the small “red cedar trees” that seem to be invading fencerows and highways, especially U.S. 31 north of Kokomo. I think a column from you would be worthwhile, since I can`t seem to get my neighbors to control the “pretty little trees,” which are much like Canadian thistle and kudzu. — E.W., Kokomo A. The eastern red cedar is a juniper, rather than a true cedar. Known […]


July Garden Calendar


HOME (Houseplants and indoor activities) Closely watch houseplants that have been set outdoors. They need more water than they did indoors. They can dry out rapidly in hot, summer breezes. Propagate houseplants by taking cuttings from vigorously growing plants. Place the cut end in rooting media (such as perlite, vermiculite, or peat moss soil mix). Enclose in plastic and keep out of direct sunlight. YARD (Lawns, woody ornamentals, and fruits) Keep newly established plants watered […]


Use Caution With Spreading Plants


People often select plants first for their beauty and second for their functionality in the garden. Frequently, we don’t know or don’t consider a plant’s behavior when we’re selecting them. Almost by definition, a species that is an effective ground cover will have a spreading habit. But does that make the species aggressive or invasive? There can be much confusion about the meaning of the terms aggressive and invasive. Some plants, given their optimal habitat, […]


Common Winter Injury Symptoms We Saw this Spring


Q. I have a yucca tree that is 5-6 years old. What was a small plant has become a mature tree. I transplanted my yucca to a larger pot last summer. There was a significant explosion in growth. If you look at the picture you can see the growth. Unfortunately, it suffered through this past winter indoors. Much of the new growth witnessed last year is gone. Please see the attached photo — I think it […]

 Categories:

June Garden Calendar


HOME (Houseplants and indoor activities) Indoor plants will require more frequent watering and fertilizing as they increase their summer growth. You can move houseplants outdoors to a shady location, but pay close attention to their watering needs. Cut garden flowers for indoor beauty. Recut the stems again just before placing in water. Add a floral preservative, and change the solution frequently. Root cuttings of houseplants and garden plants to increase your collection or share with […]


Dividing iris


Whether you’re looking to expand your planting of iris or just need to rejuvenate an older planting, late summer through early fall is a good time to lift and divide iris. Dividing every three to five years will help rejuvenate the planting, and encourage more blossoms for the subsequent years. Most iris plants spread by means of underground stems called rhizomes. Rhizomes become too crowded over time, resulting in reduced flowering. By lifting and dividing […]


Indiana Yard and Garden – Purdue Consumer Horticulture - Horticulture & Landscape Architecture, 625 Agriculture Mall, West Lafayette, IN 47907

© 2019 Purdue University | An equal access/equal opportunity university | Copyright Complaints | Maintained by Indiana Yard and Garden – Purdue Consumer Horticulture

If you have trouble accessing this page because of a disability, please contact Indiana Yard and Garden – Purdue Consumer Horticulture at homehort@purdue.edu.