Serving Central NJ & Eastern PA

Core Aeration, Over-Seeding & Slit-Seeding

lawn aeration

The best natural defense against weeds is to grow dense, lush grass.


Core aeration and over-seeding or slit seeding is the key to “crowding out” weeds. The more healthy grass you have, the fewer broadleaf weeds can grow in your lawn.

We over-seed with a high quality tall fescue blend that is more disease resistant and appropriate for our zone and climate here in New Jersey and Pennsylvania.


Late summer to early fall is the optimal time for lawn core aeration and overseeding. At this time of year, grass seeds germinate better, new grass gets established faster, and there are fewer weed seeds competing with the grass.

Learn More…

Benefits of Core Aeration and Over-Seeding

Benefits of core aeration and over-seeding

Benefits of core aeration and over-seeding

  • gets oxygen to the roots allowing soil to breathe
  • loosens compacted, heavy soils
  • gets water and nutrients down into the root zone
  • breaks up thatch
  • provides excellent seed-to-soil contact necessary for good seed germination

Our 4-Step Process

This simple four-step process will help build a thick, healthy lawn that’s safe and free of dangerous pesticides and chemical fertilizers.

Step 1 – Soil Testing

Turf grass roots need the proper pH and an ample supply of macro nutrients and trace minerals. Without soil testing, you don’t know which nutrients and minerals may be lacking. Many people simply fertilize their lawn according to a prescribed timeline – but unless you’ve done a professional soil test, it’s likely that you’re applying unnecessary chemicals or not enough of ones that your lawn needs.

Step 2 – Lawn Fertilization and Amendment

This step addresses the chemical (nutrient and mineral) needs of plants uncovered by the soil test. Slow release organic fertilizers work with soil microbes to provide ongoing nitrogen, phosphorus and potassium requirements.  Occasional supplementation is necessary to balance the ratios of specific minerals to keep them from being “locked up” and unavailable for plant use.

Step 3 – Building Organic Matter and a Healthy Soil Food Web

Once the chemical needs of your lawn has been dealt with, it’s time to build the organic matter in your soil. Healthy populations of soil microbes are responsible for converting, storing and releasing nutrients in plant-available form when and where turf and plant roots require them. We use a special compost tea blend to build healthy soil that will keep your lawn looking its best.

Step 4 – Core Aeration and Overseeding

Autumn is the perfect time of year to grow grass with less weed competition.

Since cool season grasses grow best in 60-75 degrees Fahrenheit, late summer to early fall is the ideal time to aerate your lawn and overseed.  We don’t generally recommend aeration in the spring as it brings weed seed to the surface, allowing it to germinate and compete with young grass.

Benefits of Core Aerating and Over-Seeding Your Lawn in Fall

soil plugs after core aeration

Soil plugs after core aeration

  • provides good seed-to-soil contact required for seed germination
  • allows for improved root growth and establishment when soil temps are still warm and air temperatures are cooler
  • minimizes competition with weed seed as most weeds are on their way out for the year
  • allows you to repair thin, bare areas that may have occurred from insect damage or drought stress during the previous growing season
  • gives grass that is newly established this autumn a healthy jump growing again early next spring before weed seed germinates

We recommend overseeding every couple years with a high quality grass seed designed for our growing zone, specifically:  tall fescue.  Many of the local blends aren’t all they say, and many other varieties are more insect and disease prone.   A tall fescue blend develops a deeper root system that provides greater drought tolerance, withstands more wear and tear and is more insect and disease resistant.

And, don’t worry about the little soil plugs left behind after core aeration.  They’ll get chopped up after a couple of regular mowings and return valuable nutrients and organic matter to your lawn.

Request a free estimate to rejuvenate your lawn or give us a call at 908-309-6611.