Mid-August is the moment. Soil is still warm enough to germinate cool-season seed in a week, nights have started to cool, and crabgrass has stopped competing. That window holds into mid-September and then it closes.
Why does the week before matter more than seeding day?
Seed germinates on contact with soil, not on thatch or matted clippings. Most failed overseedings here are not bad seed — they are seed that never touched dirt. It matters more in Burlington than most towns because much of the housing off Cambridge Street and the Route 3A corridor went up over glacial till with a thin skim of loam, and that soil compacts, sheds water and browns first in July.
What are the five things to do first?
1. Mow low and bag the clippings
Drop the deck to about two inches for the seeding pass. Short turf lets seed reach soil and lets light reach seedlings. Bag this one cut so nothing mats over the seedbed.
2. Pull a soil test
A test through the UMass Soil and Plant Nutrient Testing Laboratory costs a few dollars and takes a couple of weeks. If you have not sent one, seed anyway and send the sample now — the results tell you what to lime and feed in October.
3. Dethatch or core aerate
Cut a wedge out with a spade and look at the brown spongy layer between blades and soil. Under half an inch, skip it. Over half an inch, dethatch. Compacted, high-traffic strips do better with core aeration.
4. Order loam before the trucks fill up
Every lawn in Greater Boston wants soil on the same three weekends. A quarter-inch topdressing of screened loam over 5,000 square feet is a shade under four cubic yards, which rides out on one truck.
5. Fix the grade while the grass is short
You will never see the low spots as clearly as right after a low mow. Settled trench lines, the dip by the downspout, the sink where a stump was ground — mark them now and fill them in the same pass. Materials are in lawn levelling and repair.
How much material does each job take?
| Job | Material | Order for a 5,000 sq ft lawn |
|---|---|---|
| Topdress at ¼" | Screened Loam | 4 yd |
| Dust over fresh seed at ⅛" | Loam or Compost | 2 yd |
| Fill settled low spots | Screened Loam | 1–2 yd |
| Build organic matter | Compost | 2–3 yd |
The arithmetic is cubic yards = (square feet × depth in inches) ÷ 324. Full tables by depth are in how much loam you need to topdress a lawn.
What does delivery to Burlington cost?
Burlington is 16.8 driving miles from our Dispatch Office in Dorchester, inside the flat zone, so delivery is $100 per load. The fee is per load, and loads are counted per line item — 4 yards of loam plus 3 of compost is two trucks and two fees. Soil caps at 6 yards a trip. Browse soil or the Burlington landscape supply page.
Questions Burlington homeowners ask
Is mid-August too early to overseed?
No. Mid-August to mid-September is the strongest seeding window of the year here.
Do I need to dethatch every year?
No. Check the layer first. Most lawns need it every three or four years.
Can I topdress and seed the same day?
Yes, and it is the better sequence — spread loam, drag it level, then seed into the fresh surface.
How much water does new seed need?
Keep the top half inch damp with two or three short cycles a day until germination, then water deeper and less often. UMass Extension's turf program has the detail.
Pick your yardage in lawn levelling and repair, run your ZIP for the exact delivery price, and we will get it on a truck. Text (617) 286-2740 if you want the yardage checked first.
