Successful Lawn Seeding: Timing, Soil Prep, and Fertilization Schedule

When to Till vs. Not Till

Tilling is only needed for regrading or severe compaction. It brings weed seeds to surface. For most overseeding, core aerate instead.

Simultaneous Fertilizing, Liming, Seeding

Yes—apply starter fertilizer, lime, and seed together. Do NOT use weed control within 45 days of seeding (pre- or post-emergent).

Annual Schedule for Southern NJ (Cool-Season Grass)

Early Spring (March–April, daffodil bloom)

• Lime: 40 lbs/1,000 sq ft.
• Pre-emergent + fertilizer (e.g., Scotts Halts) OR fertilizer only if organic.

Late Spring (June)

• Post-emergent broadleaf weed control + fertilizer (e.g., Scotts Turf Builder +2) OR organic fertilizer only.
• Apply to damp weeds; no water 24–48 hrs.

Fall (Mid–Late September) — BEST SEEDING TIME

• Core aerate.
• Lime: 40 lbs/1,000 sq ft.
• Starter fertilizer + seed (sun/shade mix).
• Keep moist until germination; then taper watering.

Organic Alternative

Skip synthetic weed controls. Use corn gluten meal (20 lbs/1,000 sq ft) in early spring for pre-emergent. Hand-pull weeds. Build soil health—weeds fade in fertile soil.

Keys to Success

• Good seed-to-soil contact (roll or tamp).
• Consistent moisture during germination.
• Mow high (2.5–3.5 inches) once grass reaches 4 inches.