Both give you a lawn in the end. The choice is about budget, patience, timing and the site itself. Seed is cheap and slow, sod is fast and costly, and each suits different situations. Picking the right one saves money on a large lawn and saves a wasted season on a difficult site.
Seed
Far cheaper per square foot, with a wide choice of grass species to match your climate and shade. The trade off is time and care. Seed takes weeks to establish, needs consistent watering through germination, and is vulnerable to washout, birds and weather in the early days. A new lawn is typically seeded at about 5 pounds per 1000 square feet, and overseeding an existing lawn uses roughly half that.
Sod
An instant lawn, grown elsewhere and laid as rolls or slabs of mature turf. It costs several times more than seed, and it must be installed within a day or two of delivery because it does not store. In return you get a usable green lawn immediately, erosion control on slopes from day one, and a wider planting window. A pallet covers roughly 450 square feet, about 42 square metres.
Side by side
| Seed | Sod | |
|---|---|---|
| Cost | Low | High |
| Time to usable lawn | Weeks to months | Days |
| Early care | High, constant watering | Moderate |
| Best for slopes | Poor, washes out | Excellent |
| Species choice | Wide | Limited |
| Best planting window | Narrow, by season | Wide |
Timing
Seed has a narrow window tied to soil temperature and the growing season, since it needs weeks of mild, moist weather to establish. Sod can go down across much more of the year because it arrives already grown, which is part of what you pay for. If you have missed the seeding window and want a lawn now, sod is often the only sensible route.
Soil prep matters either way
Both fail on bad ground. Loosen the top few inches, remove debris, level it, and add topsoil or compost if the existing soil is poor. Sod laid on hard, unprepared ground will not root, and seed on the same ground will not take. Time spent on the soil is never wasted, whichever method you choose.
Which to choose
Choose seed for large areas, tight budgets, and when you can wait and water. Choose sod for speed, for slopes prone to erosion, for high traffic areas that need to be usable soon, or when planting outside the ideal seeding window. Many people compromise: sod the visible front and high traffic zones, seed the larger, lower priority areas.