Spring Tree Care Checklist for MA

Spring in Massachusetts is when your trees wake up. After five months of ice, wind, and frozen ground, March through May is the window where you either set your trees up for a strong growing season or let small problems turn into expensive ones. I am Keith McDonald, and my crew has been doing spring tree care across Billerica and Middlesex County since 1995. Here is the checklist we follow, and the one I recommend to every homeowner in our 18-town service area.

1. Walk Your Property and Inspect Every Tree

Before you do anything else, take 30 minutes and walk your entire yard. Look at every tree. Look up into the canopy. Look at the trunk. Look at the ground around the base. You are looking for winter damage that needs attention before the growing season starts.

What to look for:

• Broken or hanging branches from ice and snow loading
• Cracks in the trunk or major limbs
• Bark damage from frost cracking, especially on thin-barked species like maples and birches
• Mushrooms or fungal brackets on the trunk or at the base
• Heaving soil around the root zone, which can indicate root plate instability
• New lean that was not there before winter

If you see hanging branches, trunk cracks, or a new lean, those are not DIY items. Call a professional before those branches come down on someone. We see the worst winter damage in towns with heavy tree cover like Carlisle, Lincoln, and Concord, where mature hardwoods and tall white pines take a beating every winter. For a deeper look at warning signs, read our guide on when to remove a tree.

2. Prune Dead and Damaged Wood

Early spring, before bud break, is the best time to prune most tree species in Massachusetts. The tree is still dormant, so pruning wounds close faster once growth starts. You can also see the branch structure clearly without leaves blocking the view.

Priority pruning tasks:

• Remove dead branches of any size. Dead wood does not heal, does not contribute to the tree, and falls without warning.
• Cut storm-damaged branches back to a healthy lateral branch or the branch collar. Do not leave stubs.
• Thin crossing branches that are rubbing against each other. Rubbing creates wounds that invite disease and decay.
• Raise the canopy over walkways, driveways, and structures where low branches are a hazard.

The exception: Do not prune oaks between April 1 and July 1 in Massachusetts. This is when oak wilt disease is most easily transmitted by sap-feeding beetles. If you have oaks that need pruning, get it done in March or wait until mid-summer. Read our oak tree care guide for species-specific recommendations.

For the pruning vs. removal decision, check out our tree pruning vs. tree removal guide.

3. Mulch Correctly

Mulching is one of the best things you can do for a tree, and one of the most commonly botched. Every spring across Chelmsford, Burlington, and Wilmington, I see mulch volcanos piled two feet high against tree trunks. This kills trees. It traps moisture against the bark, encourages root girdling, and creates a hiding spot for rodents that chew the bark.

The right way to mulch:

• Apply 2 to 4 inches of hardwood mulch in a ring around the tree, starting 3 to 6 inches away from the trunk
• Extend the mulch ring out to the drip line if possible, or at least 3 feet from the trunk
• Do not pile mulch against the trunk. You should see the root flare where the trunk meets the ground.
• If last year's mulch is still in good shape, rake it to break up matting and add an inch of fresh material on top

4. Check for Pest and Disease Issues

Spring is when many tree pests and diseases become active. Catching them early makes treatment far more effective.

Watch for these common Massachusetts problems:

• Winter moth caterpillars: Small, pale green inchworms that emerge in April and May. They defoliate oaks, maples, and fruit trees. We see heavy infestations in Lexington, Winchester, and Woburn every spring.
• Eastern tent caterpillars: Silky web tents in the crotches of cherry, apple, and crabapple trees. Visible starting in April.
• Hemlock woolly adelgid: White, cottony masses on the undersides of hemlock needles. Check hemlocks in March and April before new growth masks the infestation.
• Emerald ash borer: D-shaped exit holes in ash bark, canopy dieback starting from the top. If you have untreated ash trees, they are likely infested by now.

For a comprehensive pest guide, read our article on common tree pests in Massachusetts.

5. Fertilize Stressed or Declining Trees

Not every tree needs fertilization, but trees that are showing signs of stress, stunted growth, pale leaves, or thin canopy can benefit from spring feeding. Deep root fertilization delivers nutrients directly to the root zone where the tree can use them immediately.

Spring is the ideal time because the tree is actively growing and can take up nutrients efficiently. We recommend a slow-release granular fertilizer or liquid injection for trees that have been stressed by construction, drought, or repeated defoliation from pests.

Trees that commonly benefit from spring fertilization in our area include:

• Oaks and maples that have been repeatedly defoliated by winter moth or gypsy moth
• Trees near new construction where roots were damaged or compacted
• Mature trees in lawns where they are competing with grass for nutrients
• Any tree with undersized leaves, early fall color, or sparse canopy

6. Address Soil Compaction

Massachusetts clay soils compact over winter, especially in high-traffic areas. Compacted soil starves roots of oxygen and water. If you notice that water pools around a tree instead of soaking in, the soil is probably compacted.

Aeration or vertical mulching can help. For large trees, we use an air spade to fracture compacted soil without damaging roots, then backfill with compost. This is especially valuable for mature trees in Waltham and Woburn where decades of lawn care and foot traffic have turned the root zone into concrete.

7. Plan for Summer and Beyond

Spring is also the time to plan ahead. If you know a tree needs to come down, schedule it now before the summer rush. If you want to plant new trees, April and May are ideal planting months in Massachusetts, giving roots the entire growing season to establish before winter.

Think about your summer watering plan too. Young trees planted in the last two years need consistent watering through July and August. Read our guide on summer tree watering and drought care to get ahead of the heat.

Get Your Trees Ready for Spring

If you walk your property and find storm damage, hanging branches, signs of disease, or trees that need professional pruning, call McDonald Tree Service at (978) 375-2272. We serve 18 towns across Middlesex County including Billerica, Chelmsford, Lowell, Tewksbury, Wilmington, Burlington, Bedford, Carlisle, Dracut, Westford, Andover, Woburn, Lexington, Concord, Lincoln, Winchester, Acton, and Waltham. Free estimates, honest advice, and 30 years of experience.