Tag: Horticulture

Physiological Leaf Curl in Tomatoes

Every year we have calls from gardeners who have tomato plants with leaves that curl up. When tomato plants grow vigorously in mild, spring weather the top growth often exceeds the root development. When the first few days of warm, dry summer weather hit, the plant ‘realizes’ that it has a problem and needs to increase its root development. The plant tries to reduce its leaf area by rolling leaves. The leaves curl along the length of the leaf (leaflet) in an upward fashion. It is often accompanied by a thickening of the leaf giving it a leathery texture. Interestingly, leaf roll is worse on some varieties than others.

Though rolling usually occurs during the spring to summer shift period, it may also occur after a heavy cultivating or hoeing, a hard rain, waterlogged soil or any sudden change in weather. This leaf roll is a temporary condition that goes away after a week or so when the plant has a chance to acclimate, recover from injury, or the soil has a chance to dry out.

By: Cassie Homan

Cabbageworms

Cool season vegetables such as cabbage, broccoli, and cauliflower are prone to cabbage worms. These pests are hard to spot because they are often the same color of green as the plant leaves. Early control is important. Follow this link for more information on controlling cabbage worms.

https://hnr.k-state.edu/extension/info-center/common-pest-problems/common-pest-problem-new/Imported%20Cabbageworm.pdf

By: Cassie Homan

Growing Onions

This is the time of year that onions grow and develop rapidly. Regular watering and a light fertilization are helpful to maximize growth. If your soil tends to be alkaline, use ammonium sulfate (21-0-0) at the rate of ½ cup per 10 feet of row. Alternatively, you could use a lawn fertilizer such as a 29-5-5, 27-3-3 or anything similar, but only use 1/3 cup per 10 feet of row. Make sure the lawn fertilizer does not have a weed preventer or weed killer included. Sprinkle the fertilizer 2 to 3 inches alongside the row and water in. Do not fertilize after the onions start to bulb. Onions develop so that as much as 2/3 of the bulb remains out of the soil. This is normal and there is no need to cover the bulb with soil.

By: Cassie Homan