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Michigan is home to several native pine species (Pinus spp.), and many exotic pines have been planted by homeowners and property managers, making them a common sight in our landscapes. But to ensure your pines remain healthy and don’t present safety risks, it’s important to give them the kind of care they require.
The best way to accomplish this is by securing the assistance of an ISA-certified arborist, but we’ll share some of the basics below!
Common Pines in Michigan
To start, it’s important to learn which pines are native to our state, as well as the commonly planted species.
- Eastern white pine (P. strobus): Michigan Native
- Red pine (P. resinosa): Michigan Native
- Jack pine (P. banksiana): Michigan Native
- Scots pine (P. sylvestris): Native to Europe and Asia
- Austrian pine (P. nigra): Native to Europe
- Ponderosa pine (P. ponderosa): Native to Western North America
- Mugo pine (P. mugo): Native to Europe
- Japanese black pine (P. thunbergii): Native to Japan
Did you know? The eastern white pine is Michigan’s state tree!
General Pine Tree Care in Southeast Michigan
Pines are generally hardy trees that can often survive in situations that would cause other trees to perish. In fact, that’s part of the reason they’re so commonly planted in Southeast Michigan.
With that said, it’s important to ensure your pines receive proper care, so that they’ll have the best chance of remaining healthy and looking beautiful for years. We’ll outline some of the most important care requirements and maintenance needs they have below.
Plant the Correct Tree in the Correct Spot
It is always important to plant trees in places that provide the correct growing conditions for the species, especially as it relates to sun exposure, moisture level, and size.
In terms of the pines most commonly planted in Southeast Michigan, this means planting jack, red, ponderosa, and Scots pines in areas that receive full sun exposure — these trees cannot survive for long when shaded. On the other hand, eastern and mugo pines will often adapt to partially shaded areas, especially while they’re young.
Pines also exhibit varying moisture requirements. Eastern white pines, mugo pines, and Japanese black pines tend to like areas with relatively high soil moisture (but not saturated soils — very few pines will thrive when growing in wet areas). Conversely, red, ponderosa, and jack pines are all quite drought-tolerant, and prefer drier, sandier soils.
Finally, it’s important to consider the amount of space you have available. White and ponderosa pines become absolutely gigantic in many cases, so they’re inappropriate for small properties and should never be planted near utility lines. Mugo pines, Japanese black pines, and jack pines, on the other hand, rarely exceed 50 feet in height (and most are much smaller), so they fit better in tight planting spaces.
Mulch Around the Root Zone
Laying down a 2- to 4-inch-thick layer of organic mulch or wood chips is very helpful for almost every tree species, including the pines commonly planted in Southeast Michigan. Mulch helps to reduce soil compaction, moderate temperature extremes, slow the evaporation of water, provide nutrients to the soil, and prevent weed growth.
And perhaps most importantly, mulching around the base of a tree helps to prevent the need to use mowers or string trimmers near the trunk or roots. This prevents the kind of damage that often allows fungi to invade a tree, compromising its health.
Ideally, you’ll lay the mulch down under the entire canopy, from about 2 inches away from the trunk (you don’t want mulch actually contacting the trunk) to the edge of the drip line.
Protect the Tree from Damage
In addition to protecting the tree’s trunk and roots with a layer of mulch, you’ll also want to do whatever you can to prevent other kinds of harm. This may mean wrapping the tree in a protective barrier while young to prevent deer, rabbits, and squirrels from chewing on the bark, or you may need to trim other nearby trees, which have dead or dying branches that may fall onto your pines.
It’s also worth considering the kinds of damage your tree will be exposed to when you’re identifying a planting location. You don’t want to plant a pine tree too close to the road, for example, as it’ll be subjected to salt spray in the winter and vehicular traffic, which may damage its branches.
Inspect Regularly for Signs of Pests or Disease
At least once per month, you’ll want to walk around your pine trees and carefully examine them for any signs of pests or disease. Look for things like:
- Frass (the sawdust-like waste material left behind by wood-boring insects)
- Sap bubbling from the trunk or branches
- Mushrooms or conks growing on or around the tree
- Discolored needles
- Shed needles
- Misshapen twigs or pinecones
- Visible insects
- Cavities or hollows
If you note any of these signs or symptoms while examining your tree, contact the pros at Longtree Tree Service immediately and have the disease identified and an assessment performed.
Conduct Regular Soil Tests
Pine trees need the correct soil chemistry to get the nutrients they require and remain healthy. The best way to ensure that the soil meets these requirements is by conducting annual soil tests.
A soil test will help determine if there are any nutrient deficiencies, such as inadequate nitrogen, phosphorus, or potassium — the three macronutrients trees need in relatively large quantities. It’ll also help you determine if the soil is deficient in any micronutrients, such as magnesium, calcium, or sulfur. If deficiencies are detected, you can apply a fertilizer to help correct them. Just be sure that you select a slow-release fertilizer that is specifically designed to address the deficiencies you’re trying to correct.
A soil test will also let you know the pH level of the soil. Unfortunately, it’s not easy to make significant changes to the pH of a large volume of soil, but there are a few ways a certified arborist may be able to help. Ideally, you’ll test the pH of the soil before planting a new pine to determine which species would thrive best in the area.
For example, jack, eastern white, and red pines tend to thrive best in slightly acidic soils, while Scots and Austrian pines are more tolerant of alkaline soils.
Pine Tree Pruning
Pine trees don’t usually require the same kind of structural pruning that many hardwood trees need.
Most pines have an excurrent growth pattern, meaning that they develop tall central leaders and relatively narrow canopies. This contrasts with the decurrent growth pattern of many hardwoods, which yields a rounder canopy that can require pruning to maintain.
With that said, there are a few cases in which you may want to prune a pine tree:
- Correct structural issues (rare, but it does happen at times)
- Remove dead, dying, or diseased limbs
- Increase access beneath the tree
- Enhance airflow or light penetration
If you feel that your pine trees must be pruned for any of these reasons, contact us immediately to schedule a free consultation. It is possible for homeowners and property managers to carry out very minor, ground-based pruning work, but it is always better to contact the professionals.
If you do decide to prune your pine trees yourself, you must:
- Never use a ladder when pruning.
- Avoid pruning trees near power lines.
- Always prune during the dormant winter season.
- Avoid removing more than 20% to 30% of the canopy in a calendar year.
- Use the correct tools (properly sharpened chainsaws or pole saws).
- Try to stick to removing dead (rather than live) limbs.
- Place the cuts appropriately, just outside branch collars or nodes.
- Avoid covering the resulting stubs with paint or other products.
Curious about other Michigan trees? Check out our guides to ashes (Fraxinus spp.), birches (Betula spp.), and oaks (Quercus spp.)!
Let Longtree Tree Service Care for Your Pine Trees!
No matter what kind of pine tree you have in your yard or commercial property, the professional arborists at Longtree Tree Service can help keep it healthy and looking its best. Whether you need a group of pine trees trimmed in Beverly Hills, a single pine removed in Farmington Hills, or even help caring for a living Christmas tree you’ve planted, we can help!
Just remember that the sooner you contact us, the sooner we can spot potential signs of trouble and take the corrective steps necessary to help ensure it continues to thrive. This will help you avoid costly services like crane-assisted removals and emergency services.
