“Healthy plants start with answers—our arborists bring clarity, care, and solutions to your backyard.”
There are several different reasons why the trees, shrubs, or other plants in your yard are browning, stunted, or seem to be dying off. Our certified arborist team can come and help diagnose the underlying issue and provide a solution to ensure your plants are restored back to full health and beauty.
Call us today, and we can talk to you more about what you see and whether or not our team can help keep your plants healthy and strong!
Rapid evaporation from summer heat and wind can leave trees severely dehydrated and vulnerable.
Yellowing or browning leaves with spots or scorch marks are key indicators of disease or water stress.
A stressed tree is a diseased tree—our certified arborists know the signs and the solutions.
The biggest problem with trees is usually water-related. Harsh summer heat, combined with high winds can quickly evaporate the water from a tree, leaving the leaves wilted, scorched, or worse, dead, and falling. All these environmental conditions can stress a tree, and here at Monkeyman’s, we say a stressed tree is a diseased tree.
A careful examination of your wilting tree is the first step in diagnosing plant health problems. Dead leaves, brown or yellow spots, and strange bumps should all be examined. Thankfully, our ISA-certified Arborists have over 20 years of pest and disease identification.
Below are some common plant diseases and pests that our arborists mitigate on a daily basis:
Plant health care is something we offer to clients throughout the Portland metro area. Many of our customers ask, “Why is my tree dying?”?
We can diagnose any plant diseases or pests that may be affecting the health of your trees with the help of an ISA Certified Arborist. In addition, Monkeymans Tree Service arborists will prescribe a plant healthcare program that will help your tree grow and thrive. A service we provide is root spading, which allows us to remove access dirt from trees that are planted too deep. For the trees to grow to their full potential, we can also apply organic fertilizer and compost.
To evaluate the health and safety of your trees, our ISA-Certified Arborist can also conduct a tree risk assessment. Just call us today and we can make sure your trees are happy and healthy.
Our compost tea is brewed in our bioreactor at our shop in Lake Oswego, Oregon using high-quality worm castings, and compost. Compost tea can improve soil structure, water retention, suppress diseases, and enhance plant growth. Our versatile sprayers can cover your whole yard and even apply it as a foliar spray if needed. In Portland Oregon, our clients have seen improvements in their lawns and gardens after we applied our fall and spring applications.
We are one of the only tree companies in the Portland metro area that has compost tea specially curated for your trees and gardens. Our ISA Certified Arborist on staff can help answer any compost tea questions you may have, don’t hesitate to call us today.
Homeowners in Portland trust Monkeyman’s Tree Service for reliable tree care, safe workmanship, and professional service that protects their property.
We follow a simple process to deliver safe, efficient, and professional tree care.
STEP 01
Free estimate
STEP 02
Site inspection
STEP 03
Service recommendation
STEP 04
Safe work
STEP 05
Full cleanup
STEP 06
Final review
Monkeyman’s arborists treat a wide range of tree and plant conditions—from fungal infections to pest infestations.
Why are my leaves turning brown?
It is likely a common fungal disease called anthracnose. This is widespread throughout the Willamette Valley of Oregon, because of our humid and wet springs. Some affected trees include ash, walnut, maple, dogwood, and American sycamore.
Treatment: prune all effected leaves to mitigate next year’s fungal spread.
Those ugly bumps on a tree can be evidence of an insect infestation. They can be balls of eggs laid by mites, or other insects. The good news is that they rarely cause permanent damage, A trained arborist can find a way to mitigate these problems and properly diagnose a treatment plan. Early detection is always the most effective way in mitigating insect pests. Call one of our ISA Certified Arborists today
A problem in wet, humid areas, call an arborist to evaluate the problem, and they’ll most likely prescribe a fungicide to clean up that musty white coating on your tree.
If the mildew stays untreated this can inhibit optimal photosynthesis for the tree. It can also make the tree more stressed which can lead to another disease down the road.
Untreated rust is an annual threat to cereal grains across the world. It is also a dangerous fungus to trees. Rust left untreated will eventually starve a tree to death. The fungus weakens the photosynthetic process in the tree, leaving it weak, with brown spots on the leaves, and ultimately will destroy the entire tree. This fungus requires a specialist, a trained arborist that will prune the already damaged leaves and apply the tree with fungicide.
This is more a descriptive problem than one with a single cause. Insects can create these massed bundles of sticks growing from a single point on a branch, but the disease can create the same deformed pattern in your trees. To fully examine the problem you should seek the advice of a trained arborist to determine the cause and the remedy to the problem.
Why is my tree dripping white sap?
This is a common question our ISA Certified Arborists often get asked in the summertime. This is surprisingly not sap but the excrement from aphids. Also referred to as honeydew can cover tree species such as Linden and tulip poplars are usually the trees most affected.
Fun Fact, the leaves on the linden tree are edible! no wonder the aphids can’t resist eating the aromatic leaves.
From emergency removals to expert pruning, our customers trust Monkeyman’s Tree Service for fast, friendly, and flawless results—every time.
Posted on Shelley DentonTrustindex verifies that the original source of the review is Google. Crew 3 came out and trimmed our Laurel hedge along the front and top. They did a great job, and it looks so much better! Great Crew, and I certainly recommend Monkeyman's Tree Service!Posted on C BachmanTrustindex verifies that the original source of the review is Google. The crew were professional and did a great job cutting the dead limbs off our plum tree and trimmed out overgrown apple tree.Posted on Connie BaileyTrustindex verifies that the original source of the review is Google. They arrived in time and the work was more than I expectedPosted on Ken CuddTrustindex verifies that the original source of the review is Google. Crew 4 showed up on time. Nelson who ran the crew was very knowledgeable and as soon as he saw the widow maker in the tree he said “let’s go get that”. The whole crew was on all the limbing and clean up. They also cut a large branch that cracked under the weight of numerous apples this year. They finished exactly when they estimated they would. I highly recommend them and will use them again.Posted on Mary PariettiTrustindex verifies that the original source of the review is Google. Monkeyman’s tree service was fantastic! They were able to come out quickly for a bid and then do the work with in a week! The owner was incredibly genuine and helpful!Posted on Karen IrwinTrustindex verifies that the original source of the review is Google. I was very pleased with the trimming on 2 trees and removal of 1 tree. The team of 3 were very friendly, were willing to answer my questions, asked my opinion on the work as they moved to each tree, and they worked very well together. Extremely impressed and I wouldn’t hesitate to ask them back should the need arise. Thank you!Posted on Kirk SellmanTrustindex verifies that the original source of the review is Google. Couldn't have had a better experience. The guys did a great job and we're very happy. We highly recommend Monkeyman's Tree Service.Posted on Sharmin RittersonTrustindex verifies that the original source of the review is Google. I highly recommend this company. Crew 1 did exceptional work on my property at 7/21/2025. Crew 1's Brandon Weaver is extremely knowledgeable, skilled, and great. He took time to listen to me and did extra ( very dangerous) work for free. If you want great service, please contact this company and ask for crew 1 with arborist Brandon Weaver. I also very much appreciate arborist David Krone; David Krone talked with me and prepared the quote. Well, if you need any help with old trees, tree cutting down, tree trimming, dangerous tree, you should definitely contact this company as this is a very good, kind, dependable, respectable, knowledgeable, and highly skilled company. Thank you Monkeyman's Tree Service for your awesome work and for being so nice.Posted on Christian AndersonTrustindex verifies that the original source of the review is Google. Monkeyman's was great to work with from the start. From scheduling a quote and meeting with Chris, to Nelson and his crew completing the job, they were amazing. Professional, customer service driven with frequent check ins to ensure their work was to our satisfaction, and friendly. I would highly recommend Monkeyman's for your tree service needs.Posted on Billy RudockTrustindex verifies that the original source of the review is Google. We had a tall black walnut removed from a difficult location; a rather technical job in narrow spaces. They had to work around two greenhouses and garage, not a single scratch on any part of our property. Nelson and his crew were fantastic, careful and REALLY strong! Clean up was immaculate. All the interactions with your company (scheduling and estimates etc) were prompt, professional and confident. We're really happy, highly recommend.
Monkeyman’s Tree Service proudly offers expert arborist solutions across Portland and neighboring cities—ensuring safe, healthy, beautiful landscapes.
Our Portland arborists provide residential and commercial tree services. Take a look at which Portland tree services our experienced team can help you with us.