Toronto Tree Service FAQ

Do Trees Need Fertilizer?

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Tree Services in Toronto » Plant Healthcare » Do Trees Need Fertilizer?

Do Trees Need Fertilizer?

You know to fertilize your vegetable garden and houseplants, but do you know you should fertilize your trees as well? Trees live a long time, and it’s important to keep them healthy.

Fertilizing trees ensures they’re supplied with the right nutrients and have the tools they need to grow well. Since trees grow in the wild with no fertilizer applications, many people think tree fertilizer isn’t needed.

However, trees in urban environments endure a lot more than trees in the forest. They have less space, disturbances to soil from construction or planting are common, soil can be contaminated by pollutants, and weather can be affected by urban heat islands. Fertilizing helps them grow tall, strong, and beautiful.

Fertilizer and Soil Nutrients

In wilderness, soil is constantly being replenished with nutrients from decomposing leaves and plants. In city yards, where we rake up fallen leaves and keep neatly trimmed lawns, that’s usually not the case.

Fertilizer can help rebalance your soil. One of the most common fertilizer types, NPK fertilizer, adds nitrogen, phosphorous and potassium to the soil. These common elements are often lacking in urban soils. City soil can also be affected by a high pH, soil compaction, drought, and poor drainage.

Most urban soil is nutrient deficient. A basic fertilizer service will restore common nutrients back to the soil. However, for more tailored service, an arborist can run a soil test and see which nutrients are specifically missing in your soil. Some parts of the city have specific issues — for example, Scarborough’s soil has more clay.

Soil tests check for the presence of minerals like zinc and conditions like chlorosis. An arborist can recommend soil amendments on top of a basic fertilizer, or specific treatment options.

Macro and micronutrients

Soil contains two types of nutrients, macronutrients and micronutrients.

Trees and shrubs need macronutrients in larger quantities. They include nitrogen, phosphorus, potassium, calcium, magnesium and sulfur. Adding these nutrients can lead to improved growth.

Micronutrients are used by the tree in smaller amounts. They include iron, zinc, copper, cholorine, molybdenum, manganese and boron.

When Do Your Trees Need Fertilizer?

A few common tree issues can show that your trees need fertilizer. These include:

  • Discoloured leaves
  • A lack of leaves
  • Undersized leaves
  • Dead branches
  • Short twigs or branches
  • Dark leaf veins

Discoloured yellowish leaves can be a sign of chlorosis, a condition resulting from a lack of magnesium and zinc in the soil.

Which Trees Benefit Most?

Newly planted trees shouldn’t be fertilized until they’ve had a year for their roots to settle into the soil. And older mature trees still benefit from fertilization, but they won’t need as much fertilizer as trees in the prime of their growing years.

Healthy growing trees are the best candidates for fertilizer. Young trees especially benefit from fertilizing, since it can help them develop a strong trunk and root system.

Trees that have incurred damage over the spring or summer are some of the best trees to fertilize. Damage from LDD moth caterpillars, aphids, or other pest infestations can weaken a tree.

Fertilizing helps restore balance and prompt healthy new growth. Applying fall fertilizer to trees that have had non-fatal pest or fungal damage over the season helps set them up for success next spring and summer. After an intense 2021 season for LDD moth (gypsy moth) damage, fertilizing is especially recommended for trees damaged this way.

Tree Types and Fertilizer

Hardwood trees, like oak and maple, can benefit from annual fertilizing.

Fruit trees are more sensitive and have very specific fertilizer needs. It’s a good idea to run a soil test on your fruit treet before fertilizing.

NPK fertilizer is a great evergreen fertilizer. Evergreens need fertilizing when needles are discoloured or dull.

What Time of Year Should You Fertilize Trees?

Silver maple in front of house in north york, toronto

In the past, it was thought that trees should be fertilized in the spring, but more recent studies show trees benefit most from fall fertilization. After trees have lost their leaves and the first frost has passed is a good time for a fertilizer service. New growth has slowed for winter at this point. Fertilizing helps promote root growth over the winter.

If trees are fertilized at a dry time, they need to be watered after fertilizing. If you’re using a fertilizer company, they will take care of this.

Spring fertilizing helps promote healthy, green leaf growth through summer and fall.

Toronto Fall Fertilizer Service

At Vista Tree, we’re all set up to prepare your trees for winter and next season with our Fall Fertilizer Service. Fertilizing will help your tree recover from any damage or weather conditions over the summer, stay healthy through the winter, and start off next season in the best of health. To give your trees a great start for 2022 today, click here to learn more about our fertilizer service and book today!

author avatar
Michael Co-Founder
Michael is a Certified Arborist and founder of the company. He holds a Certificate in Urban Arboriculture (Honours) from Humber College, Certificate in Project Leadership from Cornell, has post-graduate studies in Urban Forestry and Arboriculture from Oregon State College of Foresty and holds a BAH in Ancient History with a minor in Business. In addition to being an ISA Certified Arborist, he is a TCIA Certified Tree Safety Professional, Tree Appraisal Qualified by Arboriculture Canada and holds a Landscape Exterminator license. Michael sat on the Board of Director for the Ontario Commercial Arborist Association in 2022 and 2023. He worked at some of the top arboriculture companies in Southern Ontario before starting Vista Tree Management. Before that, he was an award-winning Executive Director in the nonprofit sector and published marketing consultant. On the rare days off, Michael can be found at home with his family - a loving wife, two daughters and two cats in Central Toronto.
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James and his team did an excellent job trimming my Walnut and other trees on my property. They removed all the branches and tidied up very nicely before they left. I will absolutely use Vista Tree Management again.
Michal was very pleasant to deal with during the quoting process and he conveyed the most knowledge from the 3 companies I approached. James and his crew did an excellent job with the removal of two trees and pruning of a large Manitoba Maple that totally covered my deck. Great to see sunlight again! James is very friendly and also knowledgeable. When the work was completed we did a walk through and he thoroughly explained what they did. The clean up was also fantastic.
Thanks very much!
VISTA do good work. I've used then for clients and all work gets done on time with an industry competitive budget. Their customers service is always excellent as well
Showed up on time. Scoped the work with us. Cleaned up nicely. Decent price. We will use them again.
Had great experience with Vista Tree for pruning of our tree. Super quick response to seamless execution. Highly recommend!
James was extremely helpful in helping us get the right tree for our backyard and was very friendly and professional
Outstanding Service! The arborist who came to provide an estimate gave very helpful with suggestions on how we should proceed to trim a very large tree - keeping in mind privacy with neighbours and ensuring shade over our home in the summer. He even took photographs to mark up to guide the crew coming to do the work. The crew showed up as scheduled and did its work very efficiently and we were extremely pleased with the results. Very reasonable pricing - great value for the money. Vista Tree Management will be my one and only supplier of these services in the future.
Vista Tree Management provided an excellent service of removing a large tree from a backyard of my property in Toronto. The whole process of quoting, and doing the job was very efficient, clearly explained and provided as promised. Their price for the serviced was very competitive.
My parents used their service to cut a tree down in their backyard. This tree was in such an awkward position where it was interfering with 2 other neighbors. James ensured me that the service would be done in a very professional manner and no damage would be done. Im glad to say he was right and had a group of 6 hard working individuals made the job done safely and efficiently. I would highly recommend this company for anyone needing tree removal.
Everything went smooth, from the initial assessment visit to the email communication to the job getting done! Thank you guys for your professionalism and quality work!!
Vista is an excellent company to deal with. The owners went above and beyond expectations to help deal with a unique situation. The guys who did the work were not only professional but also very polite. I will be using them again to help with other work in the future.
We are very happy with all the work Vista Tree Management accomplished on our property.  James was very professional and gave us excellent advice concerning the trimming of our 12 foot cedar hedges and the pruning of our mature silver maple trees.  The crew was very friendly and hard working, they did a tremendous job on the work required and they did an excellent job with the clean up.  We would highly recommend Vista Tree services to our family and friends.  We will definitely use them again for all of our future projects.
John & Sonja
They just did my front lawn, and boy, did they leave a lasting impression!

They were straightforward with the plan - clear and precise, ensuring that I was well informed of the process and outcome. The execution was meticulous and exceeded my expectations. Moreover, the cleanliness post-service was remarkable, leaving no trace of debris or disruption.

They were on time and was the epitome of friendly and cheerful—felt like I had friends over for a garden party!

Overall, their service was excellent at every stage. The inquiry, consultation, customer support, day-of service, follow-up, and payment process were all seamless.

I had peace of mind and very happy with Vista. I highly recommend them to those in need of reliable and thorough tree management service.
I can’t say enough positive comment about James and Vista Tree. We were “ghosted” by 2 other tree management companies last fall. James came by and provided separate quotes for two very large trees on our property, both of which were a challenge to severely prune. They were a hazard and had to be addressed. The quotes were delivered the next day after assessment. The team was here on two separate days (April 30 and May 7). They were efficient, professional and most importantly safe. Hollis, the arborist who climbed the trees was friendly and communicated everything he was doing to the trees as well as any changes he made once he was up in the tree. The other members of the crew (Syd and Pete, I can’t remember the others) were professional and friendly. They cleaned everything up and were open to any suggestions we had regarding disposal of the wood. I would highly recommend this company. We will be having them back again to do more work, in the fall.
Leaside neighbours take note!! Exceptional and professional service from start to finish. The team at Vista Tree Management responded to an urgent and critical situation. They were efficient, skilled and courteous. They handled the tree removal with precision and left our backyard immaculate. I highly recommend this team for your tree removal needs. They beat the competition by $1000+
James and his team did a great job pruning and trimming our old silver maple. James answered all my questions, provided expert advice and had his team do the work shortly after. The workers were professional, cleaned the space well, and were really efficient. Would definitely recommend Vista Tree management!
James was great! Very professional and you can definitely tell he knows what he’s talking about. They provided a quote in a timely manner booked us in for the tree pruning within a few days afterwards. The job was done quickly, professionally and the crew was friendly and polite. They cleaned up everything once the work was completed. Highly recommend!
Safe, fast, personable team - did a great job with tree trimming and removal! Note: the removal of a tree was not on the original scope and they still made it happen!
By the end of the day, I wouldn’t have even known they were there.
Very Happy with the professional advice and service we received from Vista which was promptly done. The follow-up to ensure we were happy with the work was appreciated.
Highly recommend! Michal came by first to take a look at things and provide the estimate. He’s obviously passionate about what he does and I learned a ton about my tree that I had no idea about! He gave me the confidence I needed to schedule the work. James and the “J-Crew” arrived on the scheduled day and were super friendly. The team did an amazing job with trimming my large overgrown maple and a fantastic cleanup job. My yard looked better than before they arrived. Will definitely have them back for future maintenance! Thanks Vista!
Great service from a great crew of people! The team was amazing from consulting on best ways to tackle the project, safely removing the trees and making sure the job was done to satisfaction. Would highly recommend and definitely use them again.
These guys are incredibly professional and by far the best arborist that have visited our home. And we've had many!

What impressed me the most was throughout their only concern was safety for my family and our property. With that and that only in mind they made all the cuts and changes that were required. When they left, I felt the most relief I felt about the trees in our backyard in a long time.

Truly appreciate your hard work and will highly recommend you in the future!
After doing a fair bit of research into Toronto-based arborists, we decided to go with Vista, and are very happy we did! From my first meeting with Mike when he came to give us a free quote, I was impressed with his knowledge and professionalism. Mike and his crew were punctual on the day they came to prune the deadwood from our very large Red Oak tree, answered my questions, and worked for 7 hours straight to get the job done. We were impressed from beginning to end, and wouldn’t hesitate to hire them again!
These guys are the best! Very professional, easy to work with and very nice people.
James was amazing in communication and and arranging everything. He is a wonderful person and professional. I had 4 different companies for the quotes and Vista Tree were the best by every criteria I had in mind. After the work was done they cleaned the whole territory even the mess that was here before them. I would definitely recommend them and will call them again when I need any tree work done. Thanks!

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