Foliar diseases of tomatoes are a common problem in the home garden. Fungal diseases, such as early blight (Alternaria tomatophila and Alternaria solani), late blight (Phytophthora infestans), and…
Many peony flowers have double or triple the number of petals – making them too heavy for their stems to support. Therefore, staking the peony stems as they emerge in the spring or as the flower buds are forming will provide the extra…
Chrysanthemums can be propagated by division and cuttings.
Divide mums in early spring just as new growth begins to appear. Dig up the entire plant and divide each plant clump into sections with a sharp knife. Each…
Leaves contain high levels of carbon and small amounts of nitrogen. The microbes that decompose leaves and other types of organic matter require nitrogen for their own metabolism and growth. A compost pile composed mainly of leaves decomposes…
Preemergent herbicides are used to prevent weeds from growing. They interrupt the growing process of a newly germinating plant, preventing that plant from becoming established. Preemergent herbicides will not impact mature or established…
Mulches control weeds by preventing the germination of weed seeds. Established weeds should be destroyed prior to the application of the mulch. In addition to weed control, mulches help conserve soil moisture, reduce soil erosion, prevent…
When planting bearded irises, dig a hole large enough to accommodate the rhizome and roots. Build a mound in the center of the hole. Place the rhizome on top of the mound and spread the roots in the surrounding trench. Then…
Cucumbers and other vine crops are monoecious. Monoecious plants have separate male and female flowers on the same plant. Male and female flowers are similar in appearance. However, the female flowers have small, immature fruits…
Grapefruit and several other types of citrus can be grown indoors in Iowa. Indoors, place citrus plants in a sunny south or west window. Water plants regularly when growing in spring and summer, less often in winter. In spring…
Place the jade plant (Crassula argentea) in a sunny window where it receives at least 4 hours of direct sunlight. The jade plant is a succulent which stores water in its foliage and stems. Overwatering (watering too…
The umbrella tree (Schefflera actinophylla) is native to rainforests in Australia and New Guinea. In the home, place the umbrella tree in bright, indirect light near an east, west, or south window. Allow the potting soil to…
Garden geraniums (Pelargonium x hortorum) are attractive flowering plants for beds, borders, containers, hanging baskets, and window boxes. Geraniums are easy to grow and provide color in the garden from May to frost.…
Ornamental grasses are low-maintenance perennials. Most thrive in sunny sites and there are species that can grow in dry, well-drained, or wet soils. While small in the nursery, many can get quite large in just a couple of years, so check the…
Raised beds may be permanent or temporary structures. Temporary raised beds are shallow beds (6 inches or less in height) constructed within the existing garden. After the garden is tilled in the spring, the loose soil is raked into raised beds.…
Crabgrass is an annual weed. In flower and vegetable gardens, hoeing and hand pulling are the best control options. When cultivating the garden, avoid deep tillage. The roots of many vegetables and flowers grow near the soil…
The striped cucumber beetle is a common pest of cucurbit crops in the Midwest. The spotted cucumber beetle, also known as the southern corn rootworm, is also a pest of cucurbit crops, but the striped cucumber beetle has more economic impact due…
In home gardens, small numbers of Japanese beetles can be controlled by handpicking. The best time to physically remove Japanese beetles is early morning when the beetles are sluggish. Collect or shake beetles into a bucket of soapy…
Nimblewill (Muhlenbergia schreberi) is a warm-season perennial grass. Nimblewill is a thin, wiry grass that is pale green or gray-green. It spreads by aboveground shoots or stolons, often forming circular spots in the lawn.…
Perennial broadleaf weeds die back to ground level in fall but send up new growth in spring. These weed species have leaves that are wider and are typically botanically classified as eudicots (dicots). Perennial weeds reproduce by…
Perennial grassy weeds die back to ground level in fall but send up new growth in spring. These weed species have long thin leaves with parallel veins. Perennial weeds reproduce by seeds or may spread by creeping above or below ground…
Perennial grassy weeds die back to ground level in fall but send up new growth in spring. These weed species have long, narrow leaves with parallel veins. They are often in the Poaceae (grass) family or a closely related family and…
Control of wild parsnip (Pastinaca sativa) and poison hemlock (Conium maculatum) is the same. Safely removing these weeds from the landscape is important as both species can be toxic to humans and animals.
Poison ivy (Toxicodendron radicans) is a native vine common to woodland areas but found frequently growing in gardens and along fence lines. This vine causes an allergic reaction (dermatitis) in most people when their skin comes in…
Tall fescue is a cool-season perennial grass occasionally present in Iowa lawns. Because it has good drought, heat, and foot-traffic tolerance, the narrow-leaf varieties (sometimes called turf-type) can be a welcome addition to the…
“Water grass” is an ambiguous name. Several plants are occasionally referred to as water grass. Two common lawn weeds that are sometimes referred to as “water grass” are crabgrass and yellow nutsedge.
Weeds compete with asparagus for light, water, and nutrients and will reduce asparagus yield and quality if not controlled. Cultivation and hand pulling are the best ways to control weeds in an asparagus planting. Hoe or…
Keeping ahead of weeds and controlling them when they are small is essential for good weed management. This requires persistence throughout the entire growing season to remove weeds as they emerge. There are essentially two types of weeds in our…
Asparagus Photo by Cindy Haynes