Summer may get all the attention for its bright blooms and vibrant greenery, but don’t overlook September. As temperatures cool and the seasons start to change, your landscape enters one of the best times for planting.
From trees and shrubs to perennials and spring-flowering bulbs, September is a great time to get plants in the ground. Also, you can still add plenty of seasonal color with cool-season plants in your containers and garden beds.
Why Plant in September?
September gives plants a combination of conditions they love: warm soil and cooler air.
The soil retains much of its summer warmth, encouraging root growth, while cooler temperatures and lower sun angles reduce water loss through leaves. With less stress from heat, plants can put more energy into establishing their roots before winter.
Fall rainfall can also help keep the soil consistently moist, giving newly planted plants a little extra help getting established.
The top of the plant may be slowing down; however, beneath the soil, the roots are still hard at work.
What Should You Plant?
Trees & Shrubs
Trees and shrubs planted in September have time to establish strong root systems before winter dormancy. When spring arrives, they’ll already have a head start.
Perennials
Hardy perennials and ornamental grasses can settle into their new homes without having to battle the extreme heat of summer. It’s a great time to add plants that will return year after year.
Spring-Flowering Bulbs
Want something to look forward to after winter? Plant spring-flowering bulbs such as tulips, daffodils, and crocuses now. They’ll spend the winter underground and emerge with some of the first color of spring.
A little planting this fall can mean a big payoff next spring.
Add a Touch of Fall Color
Your summer containers may be starting to look tired, but that doesn’t mean it’s time to put them away.
Replace summer annuals with cool-season varieties like mums, ornamental cabbage, and ornamental kale. These plants can give your porch, patio, or entryway a fresh fall look and keep your landscape colorful as summer fades.
A Few Fall Garden Tasks
Planting isn’t the only thing on your September to-do list.
- Keep deadheading annuals to encourage additional blooms and keep plants looking tidy.
- Hold off on cutting back perennials. Remove spent flowers, but wait until foliage and stems have lost their green color before cutting them back. The plant is still using that foliage to store energy.
- Divide peonies. September is a good time to divide established peonies and give their roots time to settle in before winter.
Don’t Forget Your Lawn
September is also an important month for lawn care.
Overseed thin or bare areas. Cooler conditions are ideal for cool-season grass seed to germinate and establish. If your entire lawn is looking thin, you can overseed the whole area rather than focusing only on individual patches.
Look for signs of grub damage. If you notice unexplained brown or thinning areas, the problem may be below the surface. A landscaping professional can help figure out whether grubs are present and whether treatment is needed.
Aerate when overseeding. Compacted soil can make it difficult for water, air, and nutrients to reach the roots. Aeration opens up the soil and gives grass seed better access to the conditions it needs to grow.
Make the Most of September
September isn’t the end of the gardening season; it’s an opportunity to prepare your landscape for what’s ahead.
Ready to make the most of the planting season? Whether your landscape needs new plants, a fall refresh, or your lawn could use some attention, Sweeney’s Custom Landscaping can help you get your yard ready for the months ahead.
Contact Sweeney’s Custom Landscaping today to schedule your free consultation and estimate.