If adding a tree or larger shrub has been on your garden wish list, September is a great time to make it happen. In Pennsylvania, cooler fall temperatures combined with soil that is still warm from summer create excellent conditions for establishing many woody plants.
Plant this fall, and your new tree or shrub can begin developing roots before winter and get a head start when spring arrives.
Why September Is Ideal for Planting
Summer heat can put extra stress on newly transplanted trees and shrubs. As September brings cooler temperatures, conditions become much more comfortable for both plants and gardeners.
Benefits of fall planting include:
- Cooler temperatures and less transplant stress
- Warm soil that encourages root development
- Slower moisture loss than during summer heat
- Less energy devoted to flowers and new foliage
- Time for roots to begin establishing before winter
Even when growth above ground begins slowing, important root development can continue below the surface.
Give Trees a Head Start on Spring
Planting in September allows trees and shrubs to begin adjusting to their new surroundings before winter dormancy.
When spring returns, they’re already in place and ready to continue establishing as temperatures rise. That head start can help plants transition into their first full growing season.
Add Shade and Privacy
Trees and larger shrubs can completely transform how a property looks and functions.
Consider adding them to:
- Shade a patio or outdoor living area
- Create privacy between properties
- Screen an unwanted view
- Frame an entrance or walkway
- Add spring flowers
- Bring vibrant color to the fall landscape
- Create evergreen structure
- Provide food and habitat for wildlife
Think about what your landscape needs most, then choose plants that can provide both beauty and function.
Choose the Right Plant for Your Space
Trees and shrubs are long-term additions to your landscape, so it’s important to think beyond how they look today.
Before choosing a plant, consider:
- Mature height and width
- Sun or shade requirements
- Soil and drainage
- Available root space
- Proximity to buildings
- Overhead wires
- Desired flowers, foliage, or seasonal interest
Selecting the right plant for the right location can help prevent future problems and create a more successful landscape.
Don’t Plant Too Deeply
Proper planting depth is particularly important for trees.
Dig the planting hole wider than the root ball, but avoid making it unnecessarily deep. The root flare, where the trunk begins to widen at its base, should remain visible rather than being buried beneath soil or mulch.
After planting, water thoroughly to settle the soil around the roots.
Keep Watering Through Fall
September’s cooler temperatures can make it easy to forget about watering, but newly planted trees and shrubs still need consistent moisture.
Check the soil regularly and water deeply when conditions are dry. Continue monitoring new plantings throughout fall until the ground begins to freeze.
Add Mulch, But Don’t Pile It Up
A layer of mulch around the root zone helps conserve moisture, moderate soil temperatures, and reduce competition from weeds.
Keep mulch away from direct contact with the trunk or stems. Avoid creating a mound around the base of a tree.
Invest in Your Landscape This September
A tree or larger shrub isn’t just another plant. It’s an investment that can become more valuable to your landscape every year.
Whether you’re looking for shade, privacy, flowers, fall color, evergreen structure, or a beautiful focal point, September is an excellent time to get that project started.
Frequently Asked Questions
Is September a good time to plant trees in Pennsylvania?
Yes. Cooler air combined with soil that remains warm from summer can provide favorable conditions for establishing many trees and shrubs.
Can I plant larger shrubs in September?
Yes. Many larger landscape shrubs can benefit from the same fall conditions that make September a good time for planting trees.
Do newly planted trees need water in fall?
Yes. New trees and shrubs need consistent moisture while their roots become established, especially during dry periods.
Should I fertilize a newly planted tree?
Focus first on proper planting, watering, and establishing healthy roots. Fertilizer needs can vary depending on the plant and existing soil conditions.
Should I mulch around a new tree?
Yes. Mulch can help conserve moisture and moderate soil temperatures, but it should not be piled against the trunk.
Visit Marrazzo’s Garden Center
Thinking about adding a tree or larger shrub? Fall is a great time to get started. Visit Marrazzo’s Garden Center to explore trees and shrubs and find the right additions for your Pennsylvania landscape.
Marrazzo’s Garden Center
591 Durham Road
Newtown, PA 18940
Fall Hours:
Monday to Saturday: 9 AM to 5 PM
Sunday: 10 AM to 5 PM
