Mother Nature isn’t done yet!

Lawn Insects and Lawn Fungi Are at a Near Record High This Spring:

The moisture we have received in the month of May combined with the resulting high humidity in the Denver Metro Area has created multiple environmental problems for lawns.

Lawn diseases are abnormally active because of the moisture conditions and long term wet soil.  Fungal complications in a lawn can be difficult to identify because they share many similar symptoms with other lawn problems and even with each other.

Grub Damage

Dollar spot fungus






The lawn disease process:                                                                                                 For a grass disease to exist, three primary components must exist at the same time. These are the Pathogen, the correct Environment, and the Host. If any of the three are missing the disease cannot thrive. Normally we have limited lawn disease activity in the Front Range because of low humidity. In other words, the environment is not conducive to many lawn pathogens. This year, however, we have seen enough continuous moisture to where some seldom seen fungal strains are able to thrive.

How to spot lawn diseases:                                                                                             Leaf spots, brown areas or patches of dead grass may look like damage caused by disease, but they do not automatically indicate there is a disease present. Mowing with a dull blade, scalping, lawn damaging insect activity or poor irrigation can also cause symptoms in your lawn that might be confused with a turf disease or insect damage.

chinch bugs

Chinch bug damage






Lawn Insects Are Also Thriving Because of the Conditions This Spring:

In addition to lawn fungal activity, the length of continuous moisture has provided perfect
cut wormconditions for many lawn damaging insects including Chinch Bugs, Grubs, Bill Bugs, and Cut Worms.

Insect damage tends to hit stressed areas of the lawn first, then progress from there. This means hot spots close to driveways or other concrete are especially vulnerable, as are low lying areas which stay wet for extended periods of time.

Spotting insect damage:                                                                                               Often the grass comes up easily and there is little or no signs of roots since the insects
japanese beetlefeed in the zone between the root and the green part of the grass. Grubs can often be seen when sod becomes so undermined it can be pulled up in clumps. This is especially true for lawns hit by Japanese Beetles.

Insect damage does not look uniform.  The first areas attacked look worse than surrounding areas. As lawns dry out, damage can often be seen based on the location of sprinkler heads, since the grass close to the heads gets more water and has the ability to fight off some of the damage.

If your lawn looks splotchy after the amount of moisture we have received it’s a good indication of insect and/or disease activity. It is best to get a jump on the problem before long term damage is done.

What a homeowner can do:                                                                                           Proper mowing heightKeeping grass mowed at 2.5 to 3 inches in height and not removing more than a third of the blade with each cutting will help lawns fight diseases. Allowing the lawn to dry out between waterings will also help. However, we do live in an environment which is normally very low in humidity. Once the weather pattern switches, normal watering schedules need to resume quickly.

If you have any questions, call us now!  303.232.0666
It is easier to take care of the problem now before it gets out of hand.








Mother’s Day Weather Alert – Tips to avoid freeze damage!


Here are some tips to keep your plants, trees and sprinkler systems in good shape!

If it does snow, it will be a wet heavy snow. The best thing to do is shake your tree limbs to get as much of the snow load off as possible.  You may get wet, but doing this could save you in the long run.  If you do experience any storm damage, please contact us, we will be happy to help. Call us at 303.232.0666 or click below for a free estimate request.Send us an Estimate Request

Please be careful if there are any downed power lines!  Call your electric service provider; Do NOT approach the tree.  It would be safe to assume that these lines are live.


Move any potted plants close to the house, and cover with a breathable material.  You can also cover delicate plants with flower pots, milk jugs, plastic totes turned upside down.  Old bed sheets will work for your larger plants, or you can purchase a burlap type material.  If they are smaller plants bring them indoors.  Don’t wrap the plants completely, let the covering drape so that air will circulate.


Sprinkler Systems:
Mother’s Day  is predicted to be pretty cold! We don’t know for sure if it will freeze in your area, but we always say: better safe than sorry! So we recommend this easy way to protect your sprinkler system from a possible freeze:

Get a cloth or towel, put it over the exposed irrigation pipes, then get a plastic bag, wrap it around, and secure it in place (duct tape works well). This will keep your exposed irrigation pipes safe until the weather warms up again. You can also turn off the water going out to your sprinklers from inside the house if possible.

If you do experience difficulties with your sprinkler system
please contact us at 303.457.5857

Protect your sprinklers from Freezing


Plant stress throughout the Denver Metro Area

Plant Stress throughout the Denver Metro Area
Freeze-injury-JS-late-2014-webMany of our trees and shrubs continue to show stress from the weather conditions of the past winter.  Several species of
close up needle dessication 2shrubs have been slow to shed last year’s leaves, and even slower to push out new growth this spring.  During our travels throughout the Metro Area, we have seen widespread needle damage in many Pine and Spruce trees.  There is no doubt that some of this plant material will need to be replaced.  It will be important this spring to be patient and allow our trees and shrubs a chance to show us if there is a chance to recover.

It is important to look for positive signs of life and take the necessary steps to promote Freeze damage showing new growthvigorous growth.  Many buds from last year may not open, but new tissue may emerge from dormant buds in the surrounding twigs and branches.  These dormant buds become active when the normal crown suffers damage.  Proper watering, high quality fertilization, and applications of beneficial soil organisms like Mycorrhizae and Rhizobacteria will improve soil conditions and supply our plants with the needed resources to begin the recovery process.  Be sure to monitor your plants closely for signs of life and recovery.

Freeze damaged Euonymus.

20150428_135644 (4)

May Lawn Tips

Lee’s May Lawn Tips: 

We are right around the corner from the cooler spring weather changing over to the heat of the summer. Here are a few things home owners can do and should know about their lawns.

Most lawns in our area consist of cool-season lawn grasses such as Kentucky bluegrass, perennial ryegrass, and fine fescue. These grasses naturally slow down their growing sprinklerspatterns as the temperatures head into the nineties. A yard that is not properly watered may go dormant in the heat of summer. If something happens such as a watering issue while on vacation and the lawn goes dormant, let it stay dormant until cooler weather returns. Do not allow lawns to turn brown and then water them back to a green condition over and over, as this depletes energy reserves and stresses the plants.

Water lawns deeply, applying about 1 to 1-1/2 inches per application, depending on site variables. Water early in the day or during the evening, but while the sun is still up if at all possible.

Revive Applications:
Applications of Revive help lawns deal with less water and more heat. Revive allows for easier uptake of water and provides some micro-nutrients to help the blades of the grass handle the extra stress of the longer and hotter days of summer.

Mountain High’s Lawn Department is always available to help with lawn care needs, and we are strongly recommending Revive treatments as the hot and dry days of summer provide us with extra time to enjoy our lawns.

Mountain High offers Lawn Revive treatments which help with
trouble spots and allows for better moisture uptake by the grass. 

Weeds, Insect & Disease Activity:
Denver Lawn Weed ControlMay is also when dandelions and other early spring weeds start rearing their seed Sod-webwormgenerating heads. Weeding them or getting a weed treatment to contain them before they all go to seed is important in cutting down on their numbers later in the year.

Please note; a drought stressed lawn during the summer is a prime target for insects and fungi. The more stress a yard is under the easier it is for pests to get established and do damage before anyone notices, since a dormant yard is already brown in appearance.

Proper Mowing HeightMowing height adjustment is probably the most important practice to prepare lawns for hot weather. Mow at heights at least two and a half to three inches. If in doubt, set the mower as high as it will go. Lawns maintained at higher heights usually develop deeper roots and dry out slower than closely mowed turf. Lawn growth will slow as the weather gets drier and hotter.

Keeping blades sharp will allow the tips of the grass to heal more rapidly and prevent moisture loss and stress. A lawn cut with a dull blade will lose almost double the water of a yard cut with a very sharp blade.





Happy Earth Day to William Roberts School at 2100 Akron Way in the Stapleton area.  They were the recipients of an Earth Day remodel.  The ALCC organized this project in conjunction with a grant from the Home and Garden Show and mulch that was donated by Mountain High Tree, Lawn & Landscape Co.  Many other companies donated plants, supplies and equipment to make this happen.

There were several volunteers, including Ralph Bronk, (owner of Mountain High Tree, Lawn & Landscape Co.) that helped to give a large raised bed a much needed makeover.  In the process they also built and installed several raised vegetable beds that will allow the school to grow vegetables for school use.  While this is a great program, it will also teach the children how to grow their own vegetables at home.

Earth day Collage

Earth Day Collage 2

Get to know us – Jaime Astorga!

IMG_4039Jaime Astorga is a great person to work with, he always has a smile and a good word for you! Don’t you love working with people like that? Maybe that is why Jaime has worked for Mountain High Tree since 1998. Jaime “loves to climb trees” and is really superb at what he does. Jaime has lived in Denver for 26 years. He and his beautiful wife Fernandina have been married for 20 years and they have 3 children that they are very proud of. When asked what he likes to do in his spare time, of course, it is to spend time with his family. I have to add a note from all of us here at MHT, that Jaime cooks the best fried Tilapia around!

What to look for when purchasing plants

Understanding what to look for when selecting plant material can make the difference between a healthy tree or shrub and one that will struggle or die. Typically the smaller the plant, the less you have to look for. When it comes to smaller one or two gallon plants, you should be looking for firm, consistently colored foliage that is fully intact. Wilted or discolored leaves could indicate over watering or other more serious issues. Look at the underside of the leaves to see if there are any unwanted insects or diseases associated with the plant. Always make sure that the soil has a good moisture level.
When you are looking at larger shrubs (typically woody plant material) you will follow the same guidelines as the small perennials, but you will also have to look for damage to the bark on the trunk or stem, as well as any limb damage. Take notice of multi-stemmed plants where the stems meet the soil so that none of them have cracked or separated
from the other stems if attached. Ensure that there are minimal roots exposed at the base of the container. A large amount of roots coming out of the drain holes in the bottom of the container could indicate that the plant has been in the container for more than one season and is likely root bound.

balled and burlapped treeWith larger trees and shrubs you will follow the same procedure as the smaller plants and shrubs, but you will also want to make sure that there is no damage to the trunk of the tree. The bark on a young tree is very soft and if damaged could lead to insect infestation or rot as the tree matures; creating an unsafe mature tree or at the very least can shorten the life expectancy of the tree. You will also want to look at where the trunk meets the soil and make sure that the twine that holds the burlap in place has not been on so long or so tight that there is swelling. With a deciduous tree, not only is the inspection of all of the physical aspects important, you will also want to make sure that the tree has a uniform shape and a strong central stem. Some small broken branches that can be easily trimmed back should not be alarming, however, if a larger branch breaks back to the point of attachment and the bark lilacMissKim6172007ais ripped, that would not be a good candidate.  With balled and burlapped trees you may see some roots that will extend past the burlap. As long as it is not excessive this should not be an issue, you would need to trim the roots back to the ball prior to planting. When you are dealing with balled and burlapped trees you will want to take notice of the ball shape, whether the ball is overly wet or dry and if the stem separates from the ball when gently rocked. The ball should be mostly round without any sides that have been crushed or damaged. You want to make sure that the trunk is near the center of the ball and is vertical when the ball is level. If the trunk has any separation from the ball (you can see a gap at the ball) there could have been some damage done to the ball or the root system and this would not be a good choice.

Over all most plants and trees will survive some damage and even being mishandled and will still grow to their full potential. Following these guidelines will help minimize the mortality rate in your landscape project and will also ensure happy, healthy plants.


Denver Mulch Donation to Community Garden in Montclair

Lakewood Mulch

Despite the snowy foggy morning, we just delivered 10 yards of donated mulch to a Community Garden in Denver’s Montclair neighborhood this morning – check out the steamy delivery! This is our classic “natural” mulch that is locally-made with the clippings from our tree pruning jobs. We age and rotate our mulch to fully sanitize it, and it’s super loose and easy to shovel and spread on your garden beds. Did you know that mulch decreases evaporation rates by as much as 35%? Make sure to put some on your beds this spring for a healthy, beautiful landscape.

Enjoy the organic mulch, gardeners, may you have a wonderful growing season!

Looking for locally-made organic mulch?
Check out the mulch colors and pricing here: Denver Organic Mulch »

Denver Mulch

Check out our mulch colors below – view mulch pricing here »

Denver Mulch in BulkDenver Organic Mulch Denver Bulk Mulch Denver Bulk Mulch Denver Organic Mulch Denver Bulk Mulch Denver Mulch in Bulk

What Coloradans Need To Know About Emerald Ash Borer


Emerald ash borer larva
Colorado State Forest Service

Here is a good article from about how Coloradans can help prevent the spread of the devastating Emerald Ash Borer, here’s an excerpt:

As spring weather gets warmer and plants start to bloom, it’s also the time for insects living within Colorado trees to awaken and emerge. One of these in particular, the invasive, tree-killing emerald ash borer is especially concerning to foresters since the insect’s target – the ash tree – is widespread along the Front Range.

Emerald Ash Borer in Denver

Click here to view a larger diagram and more info on whether or not you should protect your Ash Tree from the Emerald Ash Borer

Because the pest can go virtually undetected for the first few years of an infestation, forest authorities want the public’s help in containing the spread.

The first step to creating a plan is to identify ash trees. Next, evaluate the tree’s condition for signs of EAB infestation:

Does it have dead branches, fading foliage, thinning around the crown, or issues around pruning wounds?

Are there serpentine tunnels made by larvae under the bark, or D-shaped exit holes?

Are there new green sprouts on lower branches or lower trunk, or vertical splits in the bark?
Free Emerald Ash Borer InspectionAny increased woodpecker activity?

Should you protect your Ash Tree?

Read the rest of the article here »

Read more about the Emerald Ash Borer »


Meet our Plant Health Care and Lawn Crews – Great Guys, Great Crews!

Meet our Plant Health Care and Lawn Crews – They are the best!
Back row left to right:  Loftin Davis, John Martinez, Mike F, Matt Grabiananski, Nate Switt, Jason Byerly and Mike Huerena
Front row left to right:  Lee Kral, Zach Brooks, Vince Manus, Alex , Jerry Reynolds, Brad Harrison, Craig Little and Wes Klunk.
There are a few guys missing, we’ll catch them next month!

Lawn and Spray Crew edited with Lee 2