Wet Season Tree Care in Puerto Rico (May to November)

Puerto Rico's wet season, roughly May through November, is the harder half of the year to be a tree. It brings the rain that fuels our lush landscapes, and it overlaps almost exactly with hurricane season (June through November). That combination - heavy water, high humidity, and the threat of major storms - changes what your trees need and what you should and should not do to them.

The wet season is less about active projects and more about protection, vigilance, and readiness. Here is how to get your trees through it.

The wet season mindset: protect, watch, prepare

In the dry season, you shape and build. In the wet season, you defend. Three ideas drive everything:

• Storms are coming. The biggest wet-season risk is not slow decline, it is a tree failing in a hurricane. Readiness is the priority.
• Disease moves fast. Warmth plus constant moisture is ideal for fungal and bacterial problems. Fresh wounds are liabilities now.
• The ground is soft. Saturated soil loosens root anchoring. Trees that stood firm all dry season can uproot when soaked ground meets high wind.

What to do during the wet season

1. Finish storm prep early, then stop cutting heavily

Ideally your major trimming happened in the dry season. If you are heading into the season and still have obvious hazards - deadwood over the house, a heavy limb over the driveway, a leaning tree - address those before the first serious system. But once you are into the wet season, avoid elective heavy pruning. Large fresh cuts in warm, wet, humid conditions are slow to seal and easy to infect. Save the big structural work for the next dry season and keep wet-season cutting limited to genuine safety needs.

2. Manage drainage and standing water

Too much water is its own hazard. Constantly saturated soil suffocates roots and invites root rot, one of the most serious and least visible threats to a tree. Watch for:

• Water pooling around the base of a tree after rain and not draining
• Soil that stays soggy for days
• Early signs of root stress: thinning canopy, yellowing leaves, small leaves, or dieback at the branch tips

Improve drainage where you can, avoid piling mulch against the trunk (it traps moisture against the bark), and do not add extra water to trees that are already sitting wet. Standing water is also a mosquito breeding ground, which is its own reason to keep the property draining well.

3. Scout for disease and fungus

The wet season is prime time for fungal issues. Do regular walk-arounds and look for:

• Mushrooms or conks growing at the base or on the trunk - often a sign of internal decay
• Leaf spots, blights, or sudden leaf drop on species prone to fungal disease
• Oozing, dark, or sunken areas on bark
• Cankers on limbs

Catching these early gives you options. A fungus at the base of a large tree, in particular, is worth a professional look, because internal decay can quietly compromise a tree's structure long before it looks sick from the outside.

4. Inspect after every storm

Do not wait for the big one. Every significant rain and wind event can leave a tree quietly weakened. After storms, walk your property and look for:

• Fresh cracks or splits in the trunk or major limbs
• Partially broken branches hung up in the canopy ("widow-makers")
• A new lean, or soil lifting on one side of the base
• Exposed or torn roots

Anything that looks like a new structural problem after a storm should be assessed promptly. A branch that is 80 percent broken and hung up in the canopy will come down - the only question is whether it is on your terms or during the next gust.

5. Ease off fertilizer and go easy on the tree

The heavy growth push the rains bring means most trees do not need pushing further. Avoid heavy fertilizing in the peak wet months; forcing more soft, fast growth right before or during storm season produces exactly the kind of weak, whippy wood that fails in wind. Let the tree ride the season and save feeding for the dry-season transition.

The problems that show up in the wet months

Certain issues are practically seasonal, and knowing what to expect on your specific trees helps you catch them early.

• Fungal leaf disease on mango. Warm, wet weather drives anthracnose, which spots and blackens mango leaves, flowers, and young fruit. It rarely kills a mature tree, but it can wreck a fruit set and signals that the canopy is holding too much moisture. Good airflow from prior dry-season pruning is the best defense.
• Root rot in poorly drained spots. Any tree sitting in soil that never dries out is at risk. Avocados are especially unforgiving about wet feet. If a tree in a low, soggy area starts thinning from the top down, suspect the roots.
• Ganoderma and butt rot in palms. A shelf-like conk at the base of a palm or hardwood is a red flag for internal decay that the wet season can accelerate. Decay at the base is a structural concern, not just a cosmetic one, and it deserves a professional look.
• Sudden limb drop on water-heavy trees. Some large tropical trees take on so much water and new growth in the wet season that overextended limbs simply fail on a calm day. Reducing end-weight in the dry season is what prevents it.

None of this means the wet season is a losing battle. It means the trees that come through it best are the ones that were set up well beforehand and watched closely during it.

Hurricane readiness is wet-season care

Because hurricane season lives inside the wet season, storm readiness is not separate from tree care - it is the center of it. The trees most likely to fail are the ones with problems you can spot ahead of time:

• Deadwood and dead trees. Already-dead limbs and trunks are the first to go. Removing a dead tree before the season is one of the highest-value things you can do.
• Heavy, unbalanced canopies. A dense, lopsided crown catches wind like a sail. This is why dry-season thinning matters so much.
• Trees with prior topping cuts. Topped trees regrow weak, poorly attached limbs that break easily.
• Shallow-rooted or recently disturbed trees. Construction, trenching, or paving near roots weakens anchoring right when saturated ground is about to test it.

If you have a large tree near your home and you are not sure how it will handle a storm, a pre-season or in-season hazard inspection is the single most useful call you can make.

When to call right away

Some things should not wait for a scheduled visit. Call immediately if you see a tree leaning more than it used to, a large limb hanging or hung up after a storm, soil heaving at the base, or a tree on or near a power line. In the wet season these situations can go from concerning to dangerous with the next band of rain and wind.

We are ready when the weather is not

The wet season is exactly when our storm experience matters. Our crews have responded across Puerto Rico through Maria, Fiona, and Ernesto, and we dispatch 24/7 for fallen trees, hazards, and post-storm cleanup. Whether you want a pre-season hazard inspection or you have an emergency right now, we are one call away.

Call us at (787) 513-9441 or request an orientation. We serve all 78 municipios of Puerto Rico, work in English and Spanish, and for storm emergencies we dispatch 24/7.