Newly planted rhubarb will initially produce small, spindly stalks during its 2 year establishment period. The stalks of large, old plants may be small and spindly because of overcrowding. Poor plant vigor due to poor cultural…
Snow molds may be responsible for the brown spots in your lawn. Two snow mold diseases, gray snow mold and pink snow mold, occur in Iowa. Gray snow mold is caused by two species of the fungus Typhula, while pink snow mold is…
Without adequate light, seedlings become lanky. Tall, spindly seedlings do not transplant well into the garden. For most homes, even the brightest windowsill does not provide enough light and the light is one-sided causing seedlings…
If the daffodils aren’t blooming, the plants weren’t able to store enough food in their bulbs in the previous year. Daffodil foliage typically persists for 4 to 6 weeks after blooming. During this 4 to 6 week period, the daffodil…
A crabapple is a type of apple. The main difference between an apple and a crabapple is the size of the fruit. A crabapple is a tree that produces fruit that are less than 2 inches in diameter. An apple tree produces fruit that…
A standard fluorescent shop fixture containing two 40-watt tubes provides sufficient light to grow seedlings indoors. For best results, place one cool white and one warm white tube in each fixture. Place the fluorescent lights no more…
A late freeze in spring may damage the blossoms or developing fruit on apples, cherries, and other fruit trees. As a result, the fruit crop may be smaller than normal. The extent of damage will be determined by the plant species,…
Advertisements for gypsum sometimes claim that gypsum will help loosen heavy, clay soils and improve soil drainage. However, the addition of gypsum to Iowa soils is of little benefit. Gypsum is chiefly used to amend sodic soils. Sodic soils are…
One of our biggest frustrations with moles is the perennial misinformation that an insecticide application to kill grubs will solve the mole problem. This is the “lie that will not die.” Forty years ago, it might have been true that…
Freezing temperatures don’t harm dormant plants. In some years, warm late winter temperatures can cause some fruit trees to break bud, leaf-out, or develop flower buds earlier than normal. The inevitable below-freezing temperatures that…
In some years, warm late winter temperatures can cause some trees and shrubs to break bud, leaf-out, or develop flower buds earlier than normal. The inevitable below-freezing temperatures that follow in early spring can potentially cause…
The whitish or brown molds that grow on the surface of peat pots and other organic materials are unsightly, but will not harm healthy seedlings. However, the presence of molds may indicate excessive moisture levels. Overwatering may lead to…
Cool-season annuals are annual plants that prefer cool temperatures, growing best in spring or fall. Many are tolerant of a light frost often surviving down to 28°F or sometimes even 25°F with little damage to flowers or leaves.
