How To Treat a Sick Tree in Phoenix, AZ: 6 Tips

Do you want to know how to treat a sick tree? Whether your favorite specimen shows signs of disease or it just doesn’t look as vibrant as it used to, we have you covered.

As one of the most trusted tree services in Phoenix, Tree Workers of Phoenix knows a thing or two about arboreal care. Keep reading as we walk you through the ways you can help your tree.

1. Minimize Fertilizer Usage

Did you recently apply fertilizer to your tree? Believe it or not, trees rarely need supplemental nutrition since they naturally thrive on what’s already available in the soil.

Over-fertilizing can introduce excess nutrients like nitrogen, phosphorus, and potassium. While these elements are essential, too much can disrupt the natural growth cycle and cause leaf burn, weak branches, or even root damage. High concentrations of certain minerals like calcium or magnesium also hinder a plant’s ability to absorb other critical nutrients.

If you don’t know exactly what your specimen lacks, get a soil test kit from your local garden center or seek professional tree services.

2. Use Pesticides Judiciously

Pesticides also require a careful and thoughtful approach. You might think a quick spray will solve your insect problems, but hold up.

Before reaching for that product, read its specifications first. Not all of them suit every type of tree, and some might actually do more harm than good. A little homework can save your tree from overexposure to harsh chemicals and keep it thriving in the long run.

3. Dont Overmulch

Mulching can work wonders for your tree by retaining soil moisture, regulating temperature, and minimizing weeds. Piling on too much, though, can suffocate the roots and lead to fungal diseases.

Mulch your specimen correctly by applying a one- to two-inch layer around the base that extends to its drip line if possible. Avoid touching the trunk directly — leave a gap of several inches to foster healthy airflow and prevent rot.

4. Water Your Tree During Droughts

Do you want to know how to treat a sick tree? Dry periods can make already stressed flora even weaker and impact their resilience against pests and diseases. When nature doesn’t provide enough rain, step in with supplemental watering. The warning signs of a parched specimen include:

  • Wilting or browning foliage
  • Bare branches
  • Cracks forming in the bark
  • Slow growth

You should also feel the soil around the tree’s base; does it feel dry a few inches down? Focus on deep, infrequent watering to encourage downward root growth that promotes a strong and stable plant. We also advise doing it early in the morning or late in the evening to reduce evaporation.

Would you like a more hands-off approach? Consider setting up a soaker hose or drip irrigation system to evenly deliver moisture directly to the root zone.

5. Conduct Strategic Tree Trimming

Pruning is one of the foundations of healthy tree care. Regularly removing dead or diseased branches doesn’t just improve your specimen’s appearance; it also helps direct nutrients to the healthier parts of the canopy and make it more secure.

Always use sharp, clean tools for precise cuts and to minimize infection spread. Most trees prefer their “haircut” during the dormant season, which typically falls in late winter.

6. Partner With Dependable Arborists in Phoenix

When your beloved tree shows distress, why risk its health and turn to guesswork? Tree Workers of Phoenix always has you covered.

Our specialists know how to treat a sick tree and devise a tailor-fit treatment plan. We can also provide tree stump grinding for specimens too far gone to save.

Dial 602-320-2797, or read more of our blog and learn who is responsible for fallen tree removal. Discover more today.


Tree Workers of Phoenix has been in business since 1994 and is a member of the Better Business Bureau (BBB) and International Society of
Arboriculture (ISA).


18402 N. 19th Ave. #115

Phoenix, AZ 85023

Phone: 602-320-2797

Email :

Hours of Operation :

Monday - Sunday : 9:00am-5:00pm


Call Now Button