John C. Fech - Extension Educator

Though December traditionally brings weather conditions during which outdoor plants enter winter dormancy, there are still many considerations to act upon in the landscape. Due to the diversity of plantings and locations in the state, some of the following will apply now and others in future years.

One of the most important factors in getting plants off to a good start is watering. Overall, the best guidance is to water to the bottom of the roots and to keep the roots of new plants moist, not soggy or dry. Inserting a screwdriver into the soil will help with determining the moisture content by gaining a sense required to push it in and also to feel the soil particles that stick to the blade. If they feel muddy, then water is likely being applied too often; if it’s dry and powdery, then it needs to be applied more frequently.

All lawn sprinkler systems, whether they are in-ground or above ground, have flaws.  Some of the biggest are gaps and overlaps. Actually, a well designed irrigation system, or the use of above ground spray heads utilizes overlaps in the form of “head-to-head coverage”.  This involves water from one head spraying all the way to the adjacent head and vice versa.  Since twice as much water is applied near the head as is at the end of the water stream, an even amount is applied if the system has good head-to-head coverage.

The past 22 months have brought a tremendous burden to the U.S. and other countries around the globe due to the COVID-19 pandemic.  One of the unforeseen issues is the spillover effects that the supply chain problems and worker shortages have had on the lawn and landscape industries.  While this post is not intended to encourage hoarding of products along the lines of buying up all the toilet paper in sight, it is helpful to be aware of potential price increases and product shortages at the garden center in 2022.

Many new trees and shrubs are planted in April, May and June.  By far, the two most important considerations are implementing the proper techniques for planting and watering.

If damage from voles, skunks, ice, cold temperatures or other factors have left your lawn a bit on the thin side, mid-spring is a good time to thicken up the stand. Likewise, if your landscape has a bare area due to construction or a major change, turf establishment is probably on the agenda. After the soil temperature has warmed to 50-55 degrees F for several days, been prepared with a power rake or core cultivator, the seeds dropped onto the bare soil or opened up turf stand and raked lightly with an upturned leaf rake, the next step is water to start the germination process.

In summer, it’s easy to forget about the needs of patio planters and houseplants moved outside for the summer.  There are 5 areas to focus on to keep them thriving, beginning with watering. 

Using just the right amount of water is important no matter what the situation whether it’s watering a football field or providing for your patio planters and container gardens. The keys to success are 2 fold: 1. Watering to the bottom of the roots 2. Keep the roots moist, not soggy or dry.

As snow and ice are cleared from the driveway and sidewalk, there may be more than frozen water in the shovel.

You hear these terms – “the dead of winter” and “dead to the world”, but what do they really mean?  In most cases, they’re exaggerations or synonyms for other situations; in this case, really cold weather with no end in sight and really, really tired. In the plant world, the question of “is this plant dead?” comes up quite frequently, especially in winter, and especially with broadleaf evergreens such as arborvitae, yews, holly, boxwood and Oregon hollygrape.

When a tree fails, it is sometimes difficult to determine the cause.  In many cases, it is due to a failure to spread the roots out in the planting hole or simply planting it too deeply.  Doing so leads to girdling or lack of an adequate amount of oxygen, resulting in death.  Other than the correct planting procedure, lack of good follow-up care is the next most common cause.  Each is very important in ensuring a successful planting.  Just like planting errors, many follow-up procedures can be done improperly or forgotten altogether.

Here in the dead of winter, a valuable service to hire to maintain a residential property is a snow removal company.  No more aching back, slipping and falling and shivering in the cold.  Of course all of that comes at a price, so you have to determine if it’s worth it.  As well, as their employees clean off the snow, there’s a chance that your mailbox or landscaping might be harmed, so that may be a factor in the decision.

In the overall “holiday” turf fertilization schedule, where Arbor Day, Memorial Day, Labor Day and Halloween are indicators of good timing for applications to cool season turfgrasses (Kentucky bluegrass, tall fescue, perennial ryegrass), early summer is a key timeframe for encouraging healthy growth.  When growing warm season turf species such as buffalograss and zoysiagrass, Memorial Day is perhaps the most important time to apply fertilizer, perhaps followed by a light 4th of July application if a lawn is thin or in need of recovery.

With a tip of the cap to National Groundwater Awareness Week, which was March 11-17, the landscape and gardening industry must do their part to prevent groundwater and surface water pollution on the properties we manage.

Following are effective strategies for managing lawns during periods of hot and dry weather: 1. Learn to recognize wilting in turf plants. It is relatively easy to recognize wilting on a houseplant. The leaves droop and the stem may wither, and the whole plant may have a “dull” appearance. Because turf plants are much smaller and thinner than houseplants, it is much more difficult to recognize drought stress in turf plants.

In your lawn is overly shaded and/or has poor drainage, moss may be a problem.  Moss is a fast growing, shallow rooted plant that covers the ground, smothers grass and exhausts food reserves from the soil. When moss appears in a lawn, it is usually because growing conditions for turfgrasses and landscape plants are adverse, usually too little light and air circulation.  Other conditions favorable for moss invasion include soil with poor aeration and percolation, compaction, low fertility and high acidity or alkalinity.