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Plant Health Care

Pruning cuts can tell a tale

If you are just dying to get into the garden these days, there is one essential practice that is best done during winter dormancy. Pruning is perhaps the most important landscape maintenance task performed in any space that hosts woody plants. There is a large list of benefits to plant health,...
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Hydrangea Care

Hydrangeas are one of the most popular landscape shrubs in the US.  They are known for their exquisite flowering display, with many offering a season of beautiful blooms that remain attractive into winter.  Beyond flowers, these amazing shrubs offer additional ornamental beauty from neat...
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This young red maple could benefit from corrective pruning to establish a central leader that is free of competition from adjacent limbs.

Shade Tree Pruning

Wintertime offers few activities out in the garden, other than filling bird feeders and carefully watching dormant plants for any sign of awakening as spring nears.  However, winter dormancy is the ideal time to prune woody plants.  With trees and shrubs inactive in their winter slumber,...
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Trees and other woody plants grow from buds at tip of each limb which release hormones to suppress growth of other buds lower down the stem.

How Woody Plants Grow

Woody plants are some of the largest and most long-lived plants in the landscape, forming the majestic and expansive canopy of our urban and natural forests.  With all of this wonderful woody growth, have you ever stopped to think about why woody plants attain greater height than their smaller...
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The alien-looking fingers protruding from these crabapples release spores that can infect trees in the juniper family to perpetuate cedar-apple rust disease.

Plant Pathogen Spread

Whether its fungi, bacteria or even viruses, one of the most important aspects of plant disease management is stopping or limiting the spread of infectious pathogens.  I have always been fascinated by the way these tiny organisms, rarely visible to the naked eye, make their way through nature...
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Sycamores across central Illinois are late to leaf out this year due to a commonly occurring fungal infection.

Sycamores and Anthracnose

It has been another difficult spring for sycamore trees across central Illinois as near bare canopies of this tree stick out among the fully developed leaves of neighboring trees.  However, this doesn’t necessarily spell doom for your sickly looking sycamore.  It’s all caused by naturally...
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Houseplants provide beauty as well as a plethora of human health benefits during winter although indoor plant care can often be challenging this time of year.

How to overwinter house plants

Winter is a stressful time for many plants in the landscape, given the drought conditions brought on by freezing temperatures and the effects of extreme cold. Although these stressors typically don’t impact our houseplants the same way, indoor plants experience their own form of winter stress,...
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Fall Tree Planting

Most folks think of spring as the ideal planting time for trees and shrubs.  However, fall offers a nice planting window with some added benefits over the spring season, making it my favorite time of year to establish woody plants. Fall weather can create ideal planting conditions, with...
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Hackberry Gall

As you might imagine, my family spends a considerable amount of time out observing the wonders of the natural world, and I am always fascinated by the way my kids view and interpret things in nature. Many times, their straightforward and simple perspective makes me feel like such a dummy. There is...
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Boxwoods

Boxwood shrubs are perhaps one of the most planted evergreen shrubs in landscapes around the Midwest.  Although they are typically fairly hardy in our area, many suffer from winter injury.  In addition, there are a number of other ailments for this shrub that gardeners should be aware of...
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Weeds

For gardeners, weeds represent one of our biggest challenges each growing season.  These formidable foes are relentless in their quest to invade spaces and rob the plants we love of precious water and nutrients.  Left unchecked they are equipped to out compete and shade out our garden...
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Strategic Garden Plantings

Now that March has went out like a lamb, these warmer days we are really motivating me to get out into the garden and set things in motion for the 2019 growing season.  Right now is a perfect time to direct seed many of our cool-season vegetable crops, but don’t go too wild with planting or...
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Prescribed Burning

This past week, many folks around Champaign-Urbana and surrounding areas may have noticed plumes of white smoke gently rising in the distance or caught the scent of what seems to be the well-known smell of a campfire.  It is special time of year when a tiny window of time emerges for the...
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Ice Storms and Tree Damage

Historically, our part of Illinois has been more prone to ice storms than the northern or southern part of the state.  Based on over 50 years of weather data from the Illinois State Water Survey, our area of Illinois (including Springfield, Bloomington and Champaign) is likely to have an...
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spotted wing drosophila

Spotted Wing Drosophila

In our increasingly globalized society, invasive species have become somewhat of a way of life as we continuously intermix the world’s biota. Plants and animals from other continents tend to find their way to our landscapes and often are here for good.  As a gardener, it’s difficult to keep up...
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Christmas Tree Selection

Everyone has their own idea of the perfect Christmas tree.  While I am not a person that picks the proverbial “Charlie Brown Tree”, I have certainly felt pity on the less attractive trees on the lot in years past.  Whatever your taste, a fresh cut Christmas tree adds a certain bit of...
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Holiday Cacti

Nothing symbolizes the holiday season to a horticulturalist like a holiday cactus in full bloom.  These fascinating plants are cacti, but not at all like the full-sun, desert loving specimens we commonly think of.  Instead, these plants hail from the treetops of forests in Brazil, which...
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Home Composting

One of the single best things you can do to improve your garden soil is to add organic matter.  By adding significant amounts of organic matter, you are putting fuel back into the nutrient cycle which naturally adds plant nutrients to our soil and lessens (or eliminates) the need for...
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Natural Lawn Care

During the growing season, questions about lawn or turf care are quite common at the Champaign County Extension office.  Among the many questions we receive, there is growing interest in natural or more sustainable lawn care practices.  Many perceive this goal, of a more sustainable lawn...
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a black walnut tree

Black Walnut

Anyone with a mature black walnut (Juglans nigra) on their property is likely aware that fruits are ripe now, and the baseball-sized, green bombs are beginning to fall with each slight gust of wind or, at times, seemingly at random. This native tree is prevalent throughout central...
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Organic Pest Control

In recent years, as interest in more sustainable agricultural practices has grown among home gardeners, organic pest control options have become widely available in many retail outlets and garden centers.  I use many of these products in my own garden and find their origins in nature and modes...
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Sycamores

Our native sycamore tree (Platanus occidentalis) is known for its extraordinary exfoliating bark which peels off to expose the beautiful creamy white and greenish colors beneath creating a camouflage-like appearance.  This summer many area sycamores are shedding bark at alarming rates...
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Garlic Planting

Garlic is a long-season, over-winter crop that does best when planted in the fall.  It can then be harvested in the early summer, which allows space for another summer crop.  This is rather unusual timing in the gardening world and it has always interested me for that reason. ...
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Cabbageworms

Recently, my wife, Amanda, noticed that something was chewing on the nice stand of kale she planted in our vegetable garden.  Initially, I brushed it off to the usual, acceptable amount of insect damage kale can withstand and still produce a harvestable crop.  Typically, kale has some...
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Japanese beetles emerge each June to feed on a variety of host plants, like this rose.

Japanese Beetle Emergence

Last week, I notice the first of an annual pest in our area that is always unwelcome to anyone that gardens.  Japanese beetle (Popillia japonica) adults emerge from the ground every June to voraciously consume a plethora of plants.  Although there are certainly plants these...
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Pruning Spring Flowering Shrubs

Koreanspice viburnum (Viburnum carlesii) is one of the centerpiece landscape plants in my backyard, given its prime location at the corner of our screened-in porch and patio.   Last fall it delivered a stunning display as foliage turned every shade of yellow, orange and red to...
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Dividing Perennials in Spring

In the busyness of spring and planting all our annuals, such as flowers and vegetables, the perennials in our garden often get overlooked.  To keep perennial plants performing at their peak, it is necessary to divide them from time to time in order to maintain vigor and flowering.  As a...
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Flowering Crabapples

In the past week or so, crabapple trees have stolen the spring flower show among our blooming landscape plants.  These beautiful trees produce abundant flowers for up to 4 weeks each spring, with one of the best, most showy displays of any ornamental tree species.  They pick up where the...
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Winter Damage to Evergreens

Evergreen plants, which retain their leaves (or needles) throughout the seasons, are some of the showstoppers of our landscapes in winter.  They provide some much needed color in a world devoid of the green, chlorophyll-laden foliage we have throughout the growing season.  Although...
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Orchids

In recent years, orchids have become increasingly popular as houseplants, popping up for sale everywhere from smaller garden centers to big chain stores.  Many of us have taken these plants home, given them plenty of TLC, only to be let down when they begin to suffer from wilting and...
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Gardening with Natives

Native plants are typically defined as vegetation growing wild in an undisturbed area at the time that scientific records began.  Specific climate, soils and other environmental factors, define a plants native range.  Our area is fortunate enough to have a large diversity of both prairie...
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2018 Gardening Goals

Winter is an excellent time for reflection on the past year’s growing season and any gardening successes or failures to account for next year.  In this season of seed catalog mailings and New Year’s resolutions, I have found it to be an ideal time to set gardening goals for the coming year...
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