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Yes, you can put topsoil over sand to encourage grass growth. The topsoil will help to improve water retention and promote grass roots’ development, making it a recommended step of the seeding process. Adding a layer of topsoil will provide additional nutrients to the sandy soil, helping the grass grow and remain healthy through many seasons.

Power seeding can be worth it if your existing lawn is looking sparse or patchy. Power seeding can quickly and effectively plant new grass seeds and help grow a thicker lawn. But if your lawn is in pretty good health but could use a little more TLC through dethatching, fertilizing, weeding, or aerating, you may not need to spend money on power seeding costs.

It costs $1,500 on average to hydroseed a 1/2-acre lawn professionally. DIY hydroseeding costs about $300 to $500 for the machine rental, plus the cost of your seed, mulch, and fertilizer. Often, it makes sense to hire a local lawn seeding service to hydroseed for you to ensure the best coverage and growth.

The best time to plant grass seed depends on your local climate and whether you have cool-season or warm-season grass.

For cool-season grasses (like tall fescue), the ideal time to seed is late summer or early fall (typically August and September). During this period, the soil is still warm from the summer, but the air is cooler, creating optimal conditions for germination and root establishment before winter. There is also less competition from weeds. Spring is a secondary option, but cooler soil temperatures, the risk of a late frost, and less time for the grass to mature before summer heat can make it less successful.

For warm-season grasses (like St. Augustine), the best time to plant is from late spring through mid-summer (typically May and June), when temperatures are consistently between 75 and 90 degrees Fahrenheit.

In general, it is best to avoid seeding during winter or early spring, as cold soil and air can prevent seeds from germinating. For recommendations tailored to your specific grass type and climate, consider consulting a local lawn care professional.