What Do Trees Do in the Summer Time?
When summer arrives in Maine, trees don’t slow down—they go into full production mode. While we’re enjoying long sunny days, trees are actively growing, breathing, cooling themselves, and storing energy for the seasons ahead.
Here’s a closer look at what’s really happening inside your trees during the summer months.
1. Rapid Growth Mode: Building Leaves, Branches, and Roots
Summer is peak growth season for most trees in Maine. With long days and plenty of sunlight, trees are producing energy through photosynthesis at full capacity.
During this time, they:
Expand their canopy with new leaves
Strengthen and lengthen branches
Develop deeper root systems underground
This growth isn’t just above ground—trees are constantly balancing what you see with what’s happening beneath the soil.
2. Photosynthesis Is Working Overtime
Summer sunlight fuels one of the most important processes in nature: photosynthesis.
Trees take in:
Sunlight
Carbon dioxide from the air
Water from their roots
And convert it into:
Sugars (energy for growth)
Oxygen (released back into the air)
This process is at its peak in summer, which is why trees look the fullest, greenest, and most alive this time of year.
3. Cooling Themselves Through Transpiration
Trees don’t sweat, but they do something similar.
Through tiny pores in their leaves called stomata, trees release water vapor in a process called transpiration. This helps them:
Regulate internal temperature
Move nutrients from roots to leaves
Stay cool during hot summer days
On a large scale, this also helps cool entire neighborhoods and forests.
4. Storing Energy for the Future
Summer isn’t just about growth, it’s also about preparation.
Trees store the sugars they produce so they can:
Survive the fall when sunlight decreases
Endure winter dormancy
Fuel early spring growth before new leaves appear
Think of summer as the tree’s “building and saving” season.
5. Defending Against Stress, Pests, and Disease
Warm weather also brings challenges. Insects, fungi, and drought stress are all more active in summer.
To protect themselves, trees:
Produce natural chemical defenses
Strengthen bark and cell walls
Redirect energy toward damaged or stressed areas
Healthy trees can usually handle these pressures, but weakened trees may struggle without proper care.
6. Why Summer Tree Care Matters in Maine
Because trees are working so hard in summer, this is also a critical time for maintenance and monitoring.
Homeowners should watch for:
Wilting or scorched leaves
Dead branches or sudden leaf drop
Signs of pests or fungus
Soil dryness around the base of trees
Proper watering, mulching, and occasional pruning can go a long way in keeping trees healthy through the season.
Final Thoughts
Summer is anything but quiet for trees. It’s a season of intense growth, energy production, self-cooling, and preparation for the future. Understanding what’s happening above and below the ground helps us appreciate just how alive and hardworking trees really are.
If you notice changes in your trees this summer, it’s often just part of their natural rhythm. But when something looks off, it may be worth getting a professional eye on it before small issues become bigger problems.