How do I fix a patchy lawn after a construction or paving project in NB?

Restoring a lawn after construction or paving in New Brunswick requires addressing the severe soil compaction, debris contamination, and disrupted grade that heavy equipment inevitably leaves behind. Simply scattering seed over the damaged area rarely works because the underlying soil conditions are hostile to grass establishment — this is one of the most common mistakes NB homeowners make after a driveway, addition, or septic installation project.

Start by assessing the damage thoroughly. Walk the affected areas and probe the soil with a screwdriver or garden fork. If you cannot push a screwdriver in more than 2-3 inches, the soil is severely compacted and will not support healthy turf without remediation. Check for buried construction debris — concrete chunks, nails, gravel, sawdust, and drywall are commonly left behind in NB construction sites and can leach chemicals or create drainage problems. Remove any debris within the top 6-8 inches of soil.

For moderately damaged areas (soil is compacted but not contaminated), deep core aeration in a crosshatch pattern followed by topdressing with 1-2 inches of quality screened loam and compost mix will prepare the soil for seeding. For severely damaged areas — which is more typical — you will need to rototill the top 6-8 inches of soil, remove any rocks and debris brought to the surface, and incorporate 3-4 inches of compost to rebuild soil structure. New Brunswick's naturally acidic soils (pH 4.5-6.0) may also need lime to bring pH closer to the 6.0-6.5 range that grass prefers — a soil test through the NB Department of Agriculture costs about $25-30 and is well worth it before investing in restoration.

Timing your restoration correctly is essential in NB. The ideal seeding window is late August through mid-September, when soil temperatures are warm enough for quick germination (15-20°C) but cooler air temperatures reduce moisture stress on seedlings. Spring seeding (mid-May to early June) is your second-best option but competes with weed germination. Avoid seeding in the heat of summer. Use a quality seed blend suited to your conditions — a mix of 60% Kentucky Bluegrass, 20% Fine Fescue, and 20% Perennial Ryegrass works well for most NB lawns in Zones 4-5. Apply seed at 4-6 pounds per 1,000 square feet, lightly rake it in, and cover with a thin layer of peat moss or straw mulch to retain moisture.

Keep the seeded area consistently moist — light watering 2-3 times daily for the first 2-3 weeks until germination is well established. For large areas exceeding 2,000 square feet, hiring a professional landscaper for hydroseeding ($0.10-0.20 per square foot) often provides more uniform results than hand seeding. Expect the restored lawn to take a full growing season to fill in completely.

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