Michigan Gardener - Your guide Great Lakes gardening: Garden Event Calendar / Expert Advice / Plant Profiles / Tree Care

PLEASE NOTE: In the autumn of 1995, we hatched the idea for a free, local gardening publication. The following spring, we published the first issue of Michigan Gardener magazine. Advertisers, readers, and distribution sites embraced our vision. Thus began an exciting journey of helping our local gardening community grow and prosper.
After 27 years, nearly 200 issues published, and millions of copies printed, we have decided it is time to end the publication of our Print Magazine and E-Newsletter.

How do I care for my damaged kousa dogwood tree?

January 28, 2022 • Leave a Comment

I planted a kousa dogwood last summer, and it looked to be doing well, with nice autumn foliage. Last fall it looks as if a fat raccoon has tried to sit in the fork, and two of the largest boughs have been torn off. The damaged dogwood height is about 5 feet, the largest branch left is 3/4-inch diameter, and there is a huge scar where a branch got torn off. What should I do this spring to the wound?

Do not paint or bandage the wound left by the torn branch. This only provides hiding places for insect pests and traps moisture which can lead to mold issues. Trees have an amazing ability to heal over injuries. When the wound occurred, the cambium reacted chemically to seal off that area to prevent moisture loss. Eventually an exterior bark layer will form over that spot, much like a person’s skin heals from a cut.

Make sure the dogwood is sited for optimum light and water preferences. Water the roots deeply when day temperatures are high and rainfall is absent. The tree has endured stress with this injury and used additional resources to repair itself. You can apply a granular tree and shrub fertilizer around the root zone before mulching to help the plant rebuild its energies.

Provide two inches of composted mulch over the root zone, avoiding contact with the tree trunk. Watch the tree’s growth during the season. You may notice stunted leaf and branch development and even lack of bloom buds on the side of the tree with the wound. To prevent inquisitive critters from chewing on the bark, place a narrow cage of wire mesh around the trunk from the ground to about 2 feet up, being careful not to wrap the trunk with wire.

After spring bloom, you may prune the dogwood to re-establish shape and form. In early fall, you can apply another light dose of granular fertilizer per the container label to help the tree’s nutrient storage for winter.

Elsewhere: Flowering Dogwood Problems

Will adding mulch increase the soil depth of a bed?

January 25, 2022 • Leave a Comment

If I keep adding mulch to my garden beds, will it not eventually increase the soil depth in that bed? And if it does, what happens to all the surface roots if I remove the mulch (soil)?

Adding about 2 inches of mulch to our garden beds prevents moisture loss, improves the soil condition, and prevents weeds from germinating. Natural wood mulch, composed of fine wood chips, ground up leaves and twigs, encourages worms and microorganisms to break down the material into nutrients which plants can absorb through their roots. This relationship between the soil organisms, decomposing organic material and plants creates a self-sufficient ecosystem if we, as the caregivers, don’t ruin it.

When you clean your garden beds in spring, lightly cultivate the surface material into the soil bed. How much light and water a particular bed gets can speed up or slow down the composting of the mulch. Some beds may need an inch of new mulch each year around mid-June or when temperatures heat up. Other beds may be slower and may only need additional material every other year. Application is not an auto-pilot garden chore.

Do not apply more than what is recommended. More is not better for preventing moisture loss or weeds. Thriving plants have deep roots in the soil rather than roots close to the surface. Overloading on mulch gives the plant a false sense of where the real soil is and can keep the hair-like roots away from microorganism activity.

Can I use a rusting antique urn for planting?

January 12, 2022 • Leave a Comment

I have an antique iron urn that is sitting outside and has begun to rust. Is there any danger to plants if I use it for a container/planter? Does it matter if I use annuals or perennials? I am also considering planting a yucca in it; how do you think it would do?

Your container will work well with no adverse reactions to rust by your plants. However you must drill several large holes in the bottom of the container to allow for drainage. To stop the soil from plugging the holes and restricting drainage, put a piece of screen or weed cloth over the holes. You may have a problem with the existing rust on the bottom—if you place your container on concrete or wood, the rust and water that drains out may stain the surface below. Annuals are always a good choice for planters; they do well in the summer and are not a concern when it comes time to put things away for the winter. Perennials (or the yucca) will require protection from the winter elements (such as putting the container in the garage). The same would be true for an evergreen or shrub. Perennials will also require repotting and division due to the restricted environment in the metal urn.

Digital Editions