Overseeding Guide for Toronto Lawns

Overseeding vs. Reseeding

Overseeding: broadcasting seed over existing lawn to thicken. Reseeding: preparing bare spots individually.

Bare Spot Repair

1. Loosen top 3-5" soil
2. Mix in compost/potting soil (golden rule: 1-2" compost layer dug in)
3. Seed thickly, firm well
4. Water deeply once, then keep constantly moist (daily 10-15 min) until 2" tall
5. Gradually transition to deep, infrequent over 2-3 weeks

General Overseeding

Same watering protocol: frequent/shallow until 2-3" tall, then transition.

Toronto Fertilization Schedule

• Late spring (May)
• Early fall (September)
• Late fall (November)
• ZERO summer fertilization

Key Principle

Never let seedbed dry—desiccated seeds die. Constant moisture until establishment is non-negotiable.