| SEED | SOD |
| TIME OF YEAR TO INSTALL | Not recommended for Winter or Summer, possible in Spring, best in Fall for most areas. | Year-round installation, even on frozen ground if sod is available. |
| SOIL PREPARATION |
Same for all types of lawn installation: Deeply till soil, add
necessary amendments and fertilizers, grade and level for smooth
surface, remove all debris, lightly pack and moisten. |
Same for all varieties of lawn installation: Deeply till soil, add
necessary amendments and fertilizers, grade and level for smooth
surface, remove all debris, lightly pack and moisten. |
| WATER REQUIREMENTS |
Highest water needs- Bare soil will dry quickly. Water lightly for 3-4
weeks, keeping surface moist, begin to apply 1-inch of water per week
after mowing. |
Lowest water needs- Water at installation to a depth of 6-inches, then
light waterings for next 2-3 weeks. Grass will shade soil and prevent
drying. |
| SEED QUALITY |
Extremely variable because of germination rates, weed and foreign
matter content; unknown or unspecified varieties. Generally lower
quality seed than used in cultivated sod production. |
Highest available sod quality, certified, elite seed or sprigs.
Certified to prove specific variety. Mixtures and blends used to suit
area needs. |
| WEED CONTROL |
Multiple applications of chemicals usually required to combat
competitive weed invasions until turf is well established. Mulch layer
may reduce some problems. | Minimal, if any chemical control needed. |
| UNIFORMITY OF COVERAGE |
Seeding varieties, rates, germination times, wash-outs (erosion),
traffic, feeding birds and rodents can create spottiness. Mulch layer
may reduce some problems. | 99 to 100% uniformity with use of mature turfgrass sod. |
| RUNOFF / EROSION |
Heavy rains or sloping areas will cause seed, chemicals and silt to
wash onto sidewalks and into sewer systems. Little if any protection.
Mulch should reduce erosion/runoff for several months. | Capable of handling heavy rains without erosion or damage. |
| VISUAL IMPACT | Rough texture and open soil. | Immediate beauty of a "complete" and mature landscape. |
| USABILITY | Low traffic use 2 to 4 months after seeding with faster germinating seed. Normal to high use only after first year. | Low traffic immediately. Normal, high traffic levels within 2 to 3 weeks. |
| COST VS. VALUE |
Higher management and maintenance costs, compounded by increased water
and chemical applications, as well as delay of use, poor uniformity and
lack of visual appeal are trade-offs for lower installation cost. |
Installation costs offset by added values of timing, useability,
uniformity and visual appeal. Reduced maintenance, chemical and water
costs. |