Protecting Your Landscape All Season Long

Seasonal Pest & Disease Outlook Calendar

A month-by-month overview of common pests and diseases that may impact landscapes in Northern New Jersey and Pennsylvania. Timing can vary with weather—professional monitoring helps you stay ahead.

March Cankers, Scale (Dormant), Boxwood Leaf Miner
Cankers

Cankers

Raised, blister-like lesions on twigs become visible as trees break dormancy.

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Scale Insects (Dormant Stage)

Scale Insects (Dormant Stage)

Overwintering scales may be visible on bark.

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Boxwood Leaf Miner

Boxwood Leaf Miner

Yellow patching begins to appear on foliage.

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April Eastern Tent Caterpillars, Anthracnose
Eastern Tent Caterpillars

Eastern Tent Caterpillars

Silk tents form in the crotches of cherry and crabapple trees.

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Anthracnose

Anthracnose

Early fungal activity on sycamores and white oaks during cool, wet weather.

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May Spongy Moth, Cedar-Apple Rust, Emerald Ash Borer, Aphids
Spongy Moth (formerly Gypsy Moth)

Spongy Moth (formerly Gypsy Moth)

Caterpillars hatch and can cause heavy defoliation.

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Cedar-Apple Rust

Cedar-Apple Rust

Orange, gelatinous galls on cedars; leaf spotting on apples/crabapples.

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Aphids

Aphids

Major activity often coincides with petal fall.

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June Japanese Beetles, Box Tree Moth
Japanese Beetles

Japanese Beetles

Adults skeletonize leaves on trees and shrubs.

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Box Tree Moth

Box Tree Moth

Newly detected pest that can cause early defoliation of boxwoods.

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July Spotted Lanternfly, Spider Mites, Bacterial Leaf Scorch
Spotted Lanternfly

Spotted Lanternfly

Nymphs and adults feed heavily, producing sticky honeydew.

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Spider Mites

Spider Mites

Thrive in hot, dry conditions and can cause needle bronzing.

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Bacterial Leaf Scorch

Bacterial Leaf Scorch

Premature browning becomes noticeable, especially in oaks.

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August Bagworms, Powdery Mildew, Fall Webworm
Bagworms

Bagworms

Large spindle-shaped bags become visible on arborvitae and juniper.

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Powdery Mildew

Powdery Mildew

White, flour-like coating on lilacs and dogwoods.

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Fall Webworm

Fall Webworm

Webbing appears at branch tips.

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September Beech Leaf Disease, Spotted Lanternfly (Egg Laying)
Beech Leaf Disease

Beech Leaf Disease

Dark banding and leaf distortion are most evident.

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Spotted Lanternfly (Egg Laying)

Spotted Lanternfly (Egg Laying)

Adults remain active and begin depositing egg masses.

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October Hemlock Woolly Adelgid, Secondary Fungal Growth
Hemlock Woolly Adelgid

Hemlock Woolly Adelgid

White, cottony masses are visible beneath hemlock needles.

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Secondary Fungal Growth

Secondary Fungal Growth

Sooty mold develops where insects fed earlier in the season.

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Early Spring & Fall Services

Fertilization & Soil Enhancement

Trees and shrubs are often overlooked when it comes to fertilization. Each year, fallen leaves—nature’s nutrient recycling system—are removed, while lawns compete for available nutrients.

Our soil and root-zone enhancement programs replenish essential nutrients, strengthen plant defenses, and promote long-term vitality.

Replenish Nutrients Restore what gets removed each season.
Stronger Defenses Support healthier, more resilient plants.
Root-Zone Support Improve soil conditions where it matters most.
Ready to Enhance

Transform Your Outdoor Space with Our Expertise

Contact us today to schedule a consultation and experience the difference in tree care.

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