Category Archives: Cultural Practices

Mowing, Watering, Raking

Three reasons your lawn looks bad every year

You don't have to suffer with a bad lawn in 2012

Face it, your lawn is ugly and you know it.  You can pretend the front lawn looks lush and green as your lawn tractor mows and creates a dust bowl similar to that of the great depression.  Unless of course your lawn is made up of more crabgrass than real grass?  The crabgrass will take a while to flourish, so this spring there will be more open prairie than visible lawn.  If that’s the case, at least you’ll have weeds to cut by late July. When did things go wrong?  Some lawns can die from catastrophic insect infestations and others a more gradual and slow decline. The most likely causes would be mowing abuse, poor soil care and a host of other circumstances.  So, let’s dig deeper.

Even if you had a lawn at one time, chances are you mow it to short.  I call this syndrome the “military style” mowing tactic. Short, clean, and improper.  With the mower deck only centimeters above the soil, the blade catches chunks of sod, soil and debris discarding the plume of devastation into the air or mower bag.  Like helicopters flying above the enemy, nothing survives and what is left resembles a parking lot in New York City left vacant for years.  Mowing to short heats up the soil causing weed seeds like crabgrass and spurge to germinate.  Mowing short places tremendous drought stress on the grass itself as water loss evaporates from the cut leaf blade.  Mowing short creates a short leaf blade that means less surface area for the lawn to capture sunlight and manufacture food for survival.  Would you prefer all of your teeth or only the front two for eating?  Mow your grass between 2.5 and 3 inches most of the year and you will minimize most of the aforementioned issues.

Removal of grass clippings is another mowing related issue that deprives your lawn of valuable nutrients over time.  Mulching or discarding clippings directly back onto the lawn is a desired practice as opposed to removal while mowing.  Consider your lawn a crop. Each time you remove organic matter (clippings), you deny the soil and turf (your crop) a piece of the food it needs to flourish.  Like recycling, returning that energy and sunlight in the form of clippings is a very good practice and should be encouraged all year long.  That is not to say that on occasion after returning home from a vacation or a heavy lawn growth in the spring that clippings could not be removed to facilitate a better cut.

Neglected soil is perhaps one of the greatest mysteries to a home owner. It’s almost as mysterious as the creation of the great pyramids in Egypt.  You cannot see it; you walk over it, mow over it, and wonder why your lawn looks so horrible.  Unfortunately, soil should support healthy lawn growth or other landscape plants but cannot when there are poor conditions.  While some folks may understand that their soil is sandy or full of clay, what to do about it is another story altogether.  The good news is that changing your soil from unhealthy to healthy is possible with dedicated and diligent effort.  Good soil is like a nice cake or bread mix, it needs the right ingredients in the right amounts.  For instance, organic matter is highly desired in a soil setting as it supports a wide array of micro-organisms which in turn help create a wonderful relationship with turf roots and available nutrient uptake.  Organic content, along with fine clay particles also help retain moisture needed to get through dry periods.  On the other hand, too much clay in the soil can become compacted with smaller air pockets unable to support healthy root growth.  Too much sand in your soil means little water holding capacity but great drainage- ideal for septic systems or wet areas.

The corrective measures required to improve your soil could include annual liming with either calcium or magnesium, topdressing with organic matter in the spring or fall, adding compost tea to enhance microbial life, or even the introduction of mycorrihizae by coating grass seed.  Of course, mulching your clippings, proper mowing height, raking and watering will make a big impact long term.

 

Don’t let matted leaves and early snow get you down

Clean up your yard before winter snow stays

Most folks got at least a few inches of snow this past weekend during a record setting October snow storm.  The impact on your lawn can be summed up in a few basic scenarios with the first involving moderate to substantial leaf litter on the ground now snow covered.  Left uncollected, these piles of leaves can be trouble for your lawn as colder weather approaches with snow that will not melt until spring.  As soon as you can remove leaf piles and other debris brought down by the heavy, wet snow you should plan on doing so to prevent smothering areas of your lawn.  The thicker the leaf pile, the better it will mulch your grass leaving dead spots and bare areas next year.

If you have your driveway plowed, now is a great time to put up stakes marking the edge of the lawn indicating the transition from gravel or pavement to grass.  Snow plow damage becomes visible in the spring time as snow recedes, exposing chunks of sod and grass tossed aside to dry out and die.  Without help, snow plow operators can have difficulty determining where your driveway ends and the lawn begins.  Such an error is commonplace during late night snow storms and can result in significant lawn damage.  Using posts, stakes, or sticks can provide a simple, yet effective signal and minimize or prevent the edge of your lawn from being “relocated”.

Even though it is now November, if you got caught with your lawn still needing another cut- say over 3” in height- don’t feel odd pulling out your mower for one last farewell mowing.  Many folks can remove leaves and mow simultaneously so this is a great opportunity to “get two birds with one stone” as the saying goes.  A clean, short cut in November is one way you can say “I love you” to your lawn before the onset of winter.

Many tree limbs were damaged by the weight of the snow with leaves still turning colors, many still green!  Be sure to have those branches cleanly pruned to help reduce future insect and disease damage.  Of course, remove as many downed branches on your lawn as possible, leaving the lawn surface as clean as possible before winter truly arrives.  Completing these basic housekeeping items can give your landscape the edge it might need to survive an unpredictable winter.

Snow mold in your home lawn

Classic visible snow mold damage

Cultural practices such as regular raking and mowing rank high on reducing snow mold in a home lawn setting during the fall.  Do not be tempted to cease mowing in October when a final cut should be done in November as the grass enters dormancy.  Not allowing leaf litter to accumulate or remain on the lawn as winter approaches is a great way to help minimize snow mold problems.  Cut your lawn a little shorter in late fall, as low as 1.5 inches to minimize matted grass and leaves.

Aerating will help reduce compaction and maintaining a slightly acidic soil pH will also help reduce pink snow mold.  Minimizing the amount of highly soluble nitrogen is also an important factor as succulent leaf blades are more susceptible as fall becomes winter.  Use of a slow release fertilizer while applying lower rates of nitrogen is a great solution if you have experienced snow mold problems in the past.

Gray and Pink snow mold are the two most widely known snow mold diseases in our geographic region.  Gray snow mold prefers actual snow cover while Pink can manifest itself just fine without snow so long as the moisture and temperature range are desirable.  Most snow molds become visible in March and can grow well into April with the appropriate weather conditions manifesting themselves in discolored patches ranging from 1-2ft to mere inches in diameter.  These patches can take on the appearance of cotton candy with colors ranging from gray, to pink, to white depending upon the time of day and type.

Reducing snow along your driveway, walkways, or minimizing large piles will help minimize gray snow mold at your home.  Fungicides should only be used as a last resort in a home lawn setting but can offer some protection with proper timing (late fall or early spring) and combination of products.  Creating a healthy lawn with a diverse turf grass population alongside proper cultural practices is going to be your best asset toward snow mold prevention.  If you do experience snow mold damage next spring, be sure to have your lawn aerated, raked, and fertilized to help maximize recovery of the affected areas.

Autumn brings out the best in a lawn in NH & VT

chippers can create a picture perfect lawn outside your window

With autumn in full swing, most lawns in NH & VT should be well recovered from what was a record setting summer in terms of high heat.  Any lingering damage should be very obvious and can be fixed before winter such as dead patches of crabgrass or ongoing grub activity.  September and October are ideal months to improve your grass due to warm soil, ample moisture, and cool days/nights.  Fertilizing, liming, aeration, seeding, compost tea, and optional weed reduction are all most effective at this time of the year in NH & VT.  Any insect activity should be addressed now as the longer you wait; the more lawn you lose and the more difficult the control becomes as the pests grow larger such as with grubs in the soil.

If your lawn has issues with weeds such as shepherd’s purse, chickweed, or henbit; consider a treatment this fall with products such as Dimension.  Use of the aforementioned product this fall will also provide some crabgrass suppression next spring.

Autumn is a great time to improve your soil since it is the supporting mechanism for a healthy lawn.  Topdressing with compost, adding sea kelp, or spraying on compost tea rich in humates, fungi, and bacteria are encouraging ways to improve the microbial state of your lawn before winter.  Using a high calcium lime is a positive step to not only adjust your soil pH, but provide calcium which turf greatly appreciates by improving the cation exchange within the soil itself.  What does that mean?  Calcium helps loosen soil up while Magnesium based lime tends to bind it up more.  The better the cation exchange, the less your soil will leach nutrients, especially when combined with a healthy microbial environment below ground.  Soils high in organic matter have high cation exchange capacities while sandy soils have very low ratings.  As you can see, healthy soil is more important to your lawn than you may have imagined.

As always, be sure to recycle your lawn clippings whenever possible and mow high even in the fall to promote deeper root systems.  As the leaves begin to fall and accumulate, don’t let them mulch out shaded areas- rake them up or mow them into pieces.  Improved sunlight can help those marginal areas which were blocked by a tree canopy or forest edge.  Even shade tolerant grass will appreciate a little extra sun in the fall before winter snow arrives.

July lawn tips, what to do when you take a vacation

A few easy steps can save your lawn during summer vacation

July is a month where your home lawn can be easily neglected due to many New Englanders seeking out the beach or mountain lakes on summer vacation.  There is a short checklist that can prevent some issues and provide peace of mind while you are away enjoying those early morning beach walks.

Before you depart, make sure your lawn is cut the day before you leave if possible.  If you have a mowing service, the task of mowing is not really an issue.  If you mow yourself, a cut the day before will normally give you a solid 7 to 10 day time frame in which to return without the lawn having grown too long.  In fact, during a hot July period, it is better to go 2 weeks without mowing if the air temperature is in the 80’s and rainfall is absent.  If you return and your grass is really tall, such as over 6”, removal of your clippings is recommended or be sure to rake up the rows of cut grass.

Have your lawn inspected for insect activity; left unchecked, under ideal weather conditions you can lose a lawn in days without curative action.  I have seen a number of lawns with sod webworm damage with the characteristic tan moth taking flight as you walk near.  These small patches are fist size in nature and can coalesce into larger stripes or patches if not treated during the summer months.

Although this season has been on the humid and warm side, promoting diseases over insect activity, a professional lawn evaluation is worth the peace of mind.  If your lawn has confirmed disease issues, it may well be worth a fungicide application to “clean things up” during the July/August period where serious injury can occur.  Summer diseases can easily appear to be drought or insect activity.  Hot weather and warm nights can bring on blotches and spots in mere hours without you realizing the culprit.  You may awake and look out the kitchen window only to ask “Those patches were not there yesterday, were they?”  Thatchy lawns are particularly prone to summer patch diseases, manifesting as scars and pits when placed under stress.

Irrigation or lawn watering is helpful during dry periods but is not necessary during a standard summer vacation.  If you have a sprinkler system or a friend to water, be sure to water in the am or day versus late afternoon, thus minimizing disease issues.  As always, infrequent deep watering is preferred over frequent light watering to promote deeper root systems and minimize disease.  A 1hr watering every other day is generally preferred over a daily 15 minute watering.  Don’t let your lawn stop you from enjoying a great July summer vacation.

Preparing your lawn for summer

 

Proper mowing height is the single most important thing you can do to your lawn

As June fades into July, there are definite guidelines on what you, as a homeowner should do and not do as it relates to your lawn.  The most important and often discarded piece of valuable turf information is mowing height.  Like a doctor speaking with a patient, mowing is one of the most important pieces of advice a homeowner can follow.  Even if you have your lawn professionally cut, this does not automatically mean the job will be done right.  I have seen too many commercial lawns scalped or mown below 2” during the summer, only to become stressed weakened and prone to both weeds and crabgrass.

So what is the ideal summer cut?  For most lawns, sun or shaded situations call for a high cut at 3” or maybe a little higher.  Sunny areas are prone to stress when cut in the middle of a hot day, predisposing them to all kinds of heat and mower stress.  As the grass is cut, depending upon the sharpness of the blade, the leaves lose water and can brown with the increased moisture demand.  Said another way, if you cut something, it bleeds – in this case a grass blade is mostly water.  When a mower cuts it, especially during the day, and below 2”, the lawn loses moisture rapidly.  If the soil is dry and cannot support replacing this moisture loss, you can see browning the same day or shortly thereafter.  These areas can appear as brown patches, yellowing, or widespread discoloration depending upon the time and day temperature.

The shorter the mowing height, especially as it approaches the 1” level, the more substantial damage can be caused from June through August.  The shorter the cut, the hotter the soil becomes, causing weed seeds to germinate.  Any pre-emergent barrier that may have been put down pre-maturely degrades, allowing weeds to germinate unnecessarily.  Removal of grass clippings may provide an aesthetically pleasing view, but it removes critical organic matter week after week.  There may be an occasion for this procedure, but on the whole, grass clippings should be mulched and returned to the lawn surface like leaves falling in a forest.  This way, whatever energy and professional care you are putting into your lawn will not go to waste but will provide the most benefit possible.

Lawn watering, from green to brown

Watering your lawn is essential if you want to minimize browning

June is typically a transition month from cooler wet weather to warmer and drier weather in NH and VT.  While you may enjoy the warmer weather, your lawn is composed of cool season grasses and disapproves of 80 or 90 degree days.  Your grass is designed to flourish in 60 or 70 degree temperatures, but set the weather to broil and you will have consequences.  For instance, even a healthy green lawn with plenty of water is still susceptible to leaf scorch – a condition similar to taking a vacation in Mexico in January.  The lawn has succulent leaves, full of moisture, and they may not be fully prepared for hot weather.  I have seen lawns turn from a vibrant green to patches of white or tan overnight!  I can hear the phrase “what happened?” echo down the street from front porch to porch.

How can such a thing be prevented?  You can mow regularly with a sharp blade to 3,” not too short as to cause stress.  Don’t over fertilize either because too much of a good thing is never healthy.  A lawn cranked up on the golden juice of high soluble fertilizers is predisposed to stress and what we in the business call the classic “crash.”  This crash is a like watching a nice sports car hit a concrete wall – most unpleasant.  A lawn that is racing in terms of growth can be dangerous, especially if that same lawn runs out of soil moisture and/or hits a period of 90 degree days.  This type of weather can spell all kinds of trouble for what seemed bliss for you as a homeowner. You may see all kinds of white blotching as “hot spots,” as the sunniest areas tend to dry out first and turn a dull purple or off green.

Classic drought stress brought on in June by warm weather and minimal rainfall

Don’t confuse this type of situation with summer diseases which may also be present.  Dollar spot, brown patch, and a hoard of numerous villains await a weak, dry lawn, or one that stays wet overnight due to late watering or humidity.  Drought stress or sun scald can mimic diseases like dollar spot or patch diseases during the summer.  If you are in doubt, have a professional look in order to determine what course of action may be required.

Hot spots in a lawn should receive top priority when it comes to watering

When it comes to watering, anything is better than nothing when it comes to your lawn turning from green, to dull purple, to light tan, to all out brown.  Drought stress, combined with hot weather, can cause a lawn to crash and brown out in mere days if left unattended.  Any irrigation is better than no irrigation in the sense that once your lawn goes brown, it takes weeks to start new growth and push out new green leaves.  Brown grass leaves don’t just rehydrate and turn green for the most part – they are gone and need to be replaced.  Early intervention by watering can either minimize or prevent massive browning if done correctly.  Most turf wants 1” of rainfall per week to continue normal activities.  If you can water in the morning, this is preferred to help minimize disease and evaporation in the day’s heat.  Watering for a soaking is better than a light misting.  In other words, a 1hr soak is better than 15 minutes a day, yet 15 minutes a day is better than no irrigation at all.  Early watering will yield faster results and help the lawn stay green before things turn tan or brown.  Watch for those hazing dull patches, those sections that don’t bounce back after you walk over them so you can still see your footprints.  These are the priority areas that need water versus turf that is still a vibrant green.

Spring Lawn Checklist 2011

Goodbye winter, hello green!

The snow is mostly gone, you may even have a few lingering snow banks that refuse to leave, but for the most part, your lawn is begging for some attention.  Here is a handy spring checklist for your home lawn as you prepare for spring.

1. Plow damage.  It’s been a snowy, rough winter and if you had your driveway plowed, you are likely going to have plow damage.  Chunks of sod and lawn likely got plowed up along the edges and pushed further back onto your lawn.  These pieces of turf chunks may be close to their original location which is now just a scar in the dirt.  If possible, try to put the lawn puzzle back together and place the grass pieces back onto bare soil.  It may well be weeks before anything else can be done and during that time frame, those pieces of grass will start to break dormancy and grow.  Having them at least touching soil is better than mulching your unharmed lawn where they currently reside.  You can always move these grassy sections later and seed as needed into surrounding bare areas.

2. Debris. You may well find gravel, junks of asphalt, branches, leaves, and other debris that simply don’t belong on a grassy surface.  The sooner you can rake and remove this debris, the better.  If the debris is left in its current location, you may not see it during your first mow.  Nothing is more painful than hitting sticks, rocks, and gravel with your mower having been placed onto your lawn by a plow truck.  Leaves left in piles or allowed to matt, especially in shade, will simply mulch any existing grass depending upon its health and density.  The less debris the better.

3. Raking. There are two ways to rake a lawn, one is intentionally damaging- power raking/dethatching, the other is just plain hand raking or using a pull behind tractor implement.  I do not recommend power raking/dethatching unless the lawn has a severe, and by severe I mean a thatch problem- over 1” thick.  Most lawns do not have this kind of depth when it comes to thatch.  As a result, if the average lawn is power raked, it is actually damaged by the process of tearing and cutting.  Since the grass is dormant, and likely stressed by winter ice/snow/cold damage, power raking tears up roots and actually thins a lawn which in most cases is not a desired outcome.  If seeing piles of dead grass blades makes you feel warm inside, you might want to look at a coffee or hot cocoa instead, it certainly will do less damage to your lawn.  I have seen perfectly healthy lawns nearly destroyed by well intended landscapers, only to be called in to repair the damage by overseeding and other processes.  Stick with a hand rake and fluff the lawn up to help it warm and start to grow, or hire someone to do a spring cleanup which includes light raking.  If your lawn has a thatch issue, consider core aeration later in the spring or fall after it has recovered from winter damage.

4. Fertilizer/Crabgrass control. If you are going to use either fertilizer and crabgrass control blended together- don’t put it down too early.  A crabgrass barrier/inhibitor has a limited life span and can easily thin out turf already in a weakened state from winter.  Your best bet is to apply a plain balanced fertilizer to enhance recovery in April, than follow it up with a crabgrass inhibitor in May for maximum results.  This order will accomplish the best of both treatments while not subjecting your lawn to further stress, thinning, or damage.

Prepare your lawn for spring in NH & VT

Soon my friend, soon you will cut again!

Spring is technically only a mere 4 weeks away on the calendar!  Although you are not likely to be planting any vegetables or flowers outdoors close to March 20th, the countdown to spring is on.  In the world of grass, those pesky snow banks are likely to linger well into April in our geographic region.  One can almost taste that first day when the air temperature reaches the mid or upper 50’s only to be surrounded by dark, crusty black snow banks.  Your first instinct may be to grab a rake and cleanup some of the debris left by winter wind and snow plows.  Raking even a small portion of your lawn can be therapeutic, signaling the end of white and the beginning of green.

Further raking will assist in air circulation and a drying of the lawn surface where snow mold, ice, and mice may have caused damage.  Removal of surface debris such as gravel, leaves, and branches will allow sunlight to warm the soil which will in turn stimulate green leaf blades in your lawn.  You may find mole hills as they search for insects and their favorite meal worms- in the top 6 inches of the soil.

Be careful not to apply a crabgrass barrier too soon or at a heavy rate in the spring to damaged or diseased turf.  Such an application can have an adverse affect on recovery and spring seeding/repair plans.  In addition, an early crabgrass barrier will run out of steam that much earlier in the summer, potentially giving rise to annual weeds and crabgrass in July.  One option is to lightly fertilize with a compost tea, sea kelp, or a pure blend of straight fertilizer to enhance recovery in April.  If “crabgrass control” is still a necessity, you still have plenty of time in May to apply such a product and maintain decent suppression.  As always, the best defense against crabgrass or even broadleaf weeds is a thick, healthy lawn resulting from proper cultural techniques in addition to turf health care treatments.

If you have not aerated your lawn in the past few years, or don’t even know what core aeration is, consider aerating this spring.  Core aeration is an effective way to help reduce compaction/thatch while increasing air, moisture, and nutrient availability to the lawn.  Heavy duty commercial grade aerators do a marvelous job at removing plugs and depositing them on the surface due to their heavy weight and large tines.  Overseeding after an aeration is a terrific time to thicken up those thin or weak areas in your lawn.

What large piles of snow mean to your lawn this spring.

Snow banks promote turf damage

Many are wondering what sort of impact so much snow will have on the average lawn come spring.  Generally, a decent snow cover protects your lawn from the drying winds and low temperatures common to winter weather.  However, if that same snow becomes compacted by use such as walking or driving; the grass can be damaged while in a dormant state.  Winter-kill or winter damage can often be attributed to ice formation or compaction through use.  New grass planted the prior season is especially vulnerable since it has not had a chance to mature which may result in thinning or dead patches from a harsh winter.

Snow mold is a more widespread problem resulting in various degrees of turf damage and thinning.  As snow banks recede and the weather warms in March, snow mold can thrive on the surface where the moisture level is just right and the temperature remains cool.  Snow mold has a tendency to matt down grass which is why a gentle raking is so important to help dry out the lawn surface once the sun comes out.  Improving the air circulation at the ground level and helping warm the soil through raking is a basic, yet important spring time task.

Grass which is severely stressed, or perhaps growing in the shade may in fact be further damaged by a pre-emergent crabgrass barrier while in a weakened state.  Most manufacturers of crabgrass barriers recommend a reduced rate or waiting until recovery has begun in May versus a March or April application.  In some situations, providing a basic natural or slow release fertilizer can speed up the recovery time as the soil warms and the material gradually takes effect versus a quick flush of growth from conventional fertilizers.  Since there are many variations to winter kill, ice damage, and snow mold within the same lawn and surrounding neighbors- a single solution is often not practical.  Each lawn should be evaluated individually, not treated with a cookie cutter approach where one product fits all situations.

So, before you apply a hundred pounds of fertilizer mixed with a crabgrass preventer this spring- consider the additional stress you may add to an already weakened lawn.  If you have thin or bare sections created from snow mold or winter kill, once that crabgrass barrier is down, there is no turning back and no seeding until fall.  There is a saying that goes something like “think twice, then think again, then act once” . . .