163 Search Result(s) For "pruning"


Ugly scale on hollyhocks could be fungal rust

Q. The last three years I have had scale on my hollyhocks. They just start to bloom, and the scale appears and they die. Is there something I can use to get rid of the scale? After they start to die, I clean up everything and burn. – I.T., Paoli, Indiana. A. I wonder if you might be referring to hollyhock rust, a fungal disease that commonly affects hollyhocks. The rust-colored blotches can resemble scale […]


Hops need good management through growing season

Q.  I need information on how to manage hops from the ground up and when and how to do what. Any information you can provide will be greatly appreciated, such as when to dig rhizomes, prune, storage, etc. A. Hops for production require good management through pruning, training and fertilizing and through a fairly long growing season of 120 frost-free days. Note that there are some varieties of hops that are ornamental rather than for hop […]


Garlic Mustard

Q. Could you tell me about the weed in the attached photo? I see them everywhere. Last year at the Celery Bog park, I noticed big piles of them where someone had gone through and pulled them. Is it something new to our area in recent years? And is it considered invasive? – PB, Lafayette, Ind. A. This notorious pest is called garlic mustard; it’s an invasive, biennial species that quickly colonizes where it lands. […]


Where Have All the Flowers Gone?

While some spring flowering trees and shrubs performed admirably this season, some species had few or no blooms at all. In addition, some plants were so late to leaf out they had many of us concerned that they had died overwinter. Some shrubs such as forsythia flowered only on the lower branches, where snow cover provided good insulation. While it is still possible that these plants may continue to show effects of the harsh winter, […]


Winter Desiccation of Woody Ornamentals

Winter’s howling winds and frigid temperatures are challenging for all woody landscape plants. Although our plants are fully dormant at this time, the plant tissue is still subject to losing too much water – a condition called desiccation. This year’s unusually heavy and consistent snow cover provides good insulation, and most plants went into winter with a good moisture supply this year. However, when the ground is frozen solid and freezing temperatures are accompanied by […]


The Big Chill

When winter temperatures dip below zero and winds howl across the prairie, gardeners may worry that their trees and shrubs are taking a beating. No need for doom and gloom yet – most hardy landscape and orchard plants are reasonably able to cope with most of our winters, including our recent polar vortex. Many factors influence plant injury, including plant species and cultivars, degree of plant dormancy and overall plant health. How low the temperature […]


Coping with Storm-Damaged Trees

Homeowners assessing tree damage caused by recent storms will want to make a few important decisions soon. Small trees with minor damage can probably be taken care of by the homeowner, but large, mature trees likely will need the help of a professional tree service. It can be hard to decide whether trees with severe damage should be removed. Homeowners often are reluctant to cut down a tree, either because of sentimental attachment or because […]


Question & Answer

Q. We have a Honeycrisp apple tree that is 2-3 years old. It is growing well, but straight up. It has approximately doubled in height in the year since we planted it. My question is: Can I prune the top back to make the tree less tall and bushier? I know not to do that with maple trees, but don’t know about apple trees. A. The quick answer is do NOT prune the top; this […]


Question and Answer

Q. I have several rose bushes started from a rose that has been in our family for five generations. My mother also had a bush started from the original. Two years ago, her rose started getting the red, narrow, twisted foliage as pictured. The rose eventually died. I have the only remaining plants, and one of my three bushes now has the same problem. Normal and abnormal foliage can come off the same main cane. […]


Off with their heads!

Removing spent blossoms from your shrubs and garden flowers can be tedious work, but often pays big dividends. The removal of spent flowers is often referred to as “deadheading.” Pinching or pruning off dead flowers is not just a matter of aesthetics – it can also encourage additional blooming. Many plants – petunia, geranium, marigold, speedwell, and coreopsis, among them – will re-bloom after deadheading. For these plants, the formation of fruit and seed signals […]


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