Q. My husband and I planted gallon-sized azalea plants last spring. Should they be pruned this year? If so, when and how much? We understand that they are an acid-loving plant. Since sulfur is acidic, can that be used? Thank you. — Deanna Freeman A. Typically, newly planted shrubs do not need much pruning except to cut out dead wood, which you can do at any time during the year. Improper pruning can cause a lack of […]
Q. Our family likes growing pumpkins every year. The problem is all the weeds! The weeds take over the pumpkin patch, so much so that the pumpkins can’t grow and rot before time to harvest them. What could we use to spray or use on the ground to kill out the weeds? — Gayla Merry, Mitchell, Ind. A. Preventing weed establishment is the most effective means of control. Black plastic mulch or a 2-4-inch layer of organic […]
Q. I have a ficus plant that was a gift in the fall of 2001. Recently, it started to drop leaves. It started out with a few leaves, then last week it dropped two-thirds of all its leaves. I have checked the plant for mealy and scale bugs but do not find evidence of them. I thought maybe it was getting too much sun in our solar area, and I moved it. When I checked the […]
Q. Help! Something is boring holes in my silver maple tree. There are four holes at a time in a horizontal line. These holes are a little bigger than a pencil eraser and deep enough that the tree is oozing lots of sap. What could be doing this? Will my tree die? Do I need to plug the holes and with what? What can I do to prevent this from continuing? It has happened three times […]
Q. I read your article on fire blight. We have a bad case of fire blight on one of our pear trees. You spoke of doing a pruning of the diseased parts, and we were wondering when would be the best time to do the pruning–spring or fall? — Linda Am Rhein, Scipio, Ind. A. Fire blight-infected limbs and branches should be pruned during late winter when there is much less chance of spreading fire-blight bacteria on […]
Evergreens require a bit different manner of pruning than other landscape plants. Although a plant is not likely to die from improper pruning, it is important to note that most evergreens cannot replace lost growth the way that deciduous plants can. So while other landscape plants might be able to outgrow an errant pruning job, evergreens can suffer permanent disfigurement. Individual plants should be assessed for pruning needs. Evergreens that have been sheared into formal […]
Q. Each year, including this past one, some of the new growth on my pear trees turns black and wilts. This year is the worst ever. What causes this and what can I do about it? – Ann Hunt, West Lafayette, Ind. A. Fireblight causes young twigs and flower blossoms to wilt, blacken and die. Often the tips of blighted twigs become crooked, resembling a shepherd’s staff. Fireblight affects apples, pears and certain ornamentals, including crab apples, […]
Q. I gathered some bittersweet branches last fall. These are the decorative red berries gathered in the fall for winter arrangements in the home. I have saved some well-developed seed but can’t get them to grow. I stored some in the freezer for a time, yet neither did they sprout. I’m wondering if they must pass through a bird’s digestive process to sprout. The seed appears to be encased in a thick shell. If so, […]
Q. I have a weed in my garden that I can’t get rid of. It lies close to the ground and spreads. It has small green leaves that are thick and feel like rubber. Is there anything you can tell me to help me get rid of it? Thank you. – Sheila Denton, via e-mail A. It could be a number of weeds but sounds most like purslane. Purslane thrives in hot, dry weather. The […]
Pin oak trees can be a beautiful asset to the landscape. Their pyramidal form, pendulous lower branches and reddish or bronze fall color are striking. Unfortunately, most pin oaks planted in the Midwest are plagued by a yellowing of the leaves known as chlorosis. Other landscape plants are also susceptible to chlorosis, including rhododendrons, river birch, holly and sweet gum. Chlorosis gets its name from the lack of chlorophyll, the pigment responsible for healthy plants’ […]