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The best grass type for shady areas depends on your region, your preferences, and your yard’s microclimate. Overall, the best cool-season grass for shade is ryegrass or tall fescue, while the best warm-season grass for shade is St. Augustine. But again, this can depend on what you’re looking for in the grass. The best grass for your shady yard might be one that looks good to you, one that tolerates high foot traffic, or grass with other characteristics that make it fit your lawn needs. 

This depends on the type of grass seed, as some types do better in different environmental conditions. Cool-season grasses go dormant during the summer months when the soil temperature exceeds 65 degrees Fahrenheit. Once exposed to regular doses of heat, the germination rates decline, with seedling death not far behind. 

As for warm-season seeds, they come from tropical parts of the world and thrive in heat. They actively grow in warm air temperatures between 70 and 90 degrees Fahrenheit, and they prefer soil temperatures between 65 and 70 degrees Fahrenheit. Once temperatures dip and frost rolls in, if you don’t store them properly, warm-season grass seeds will die quickly.

The time you should wait before walking on new grass depends on whether you used seed or sod. If you laid new grass seed, it's best to wait about eight weeks before stepping on it, as new grass is fragile. For sod, it typically establishes itself in the ground in about two weeks. For heavy traffic, like driving a car across a new grass driveway, you might need to wait an entire season.

The best time of year for power seeding depends on your local climate. The soil should be warm, but the air should be cool. If the weather gets too hot after you grow new grass seed, it can die off easily. The best time for power seeding warm-season grasses is late spring to summer, and the best time for power seeding cool-season grasses is in the fall.