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You can, like you can put too little down. Sowing too much grass seed can create competition between the seeds for resources (light, water, nutrients) and the seedlings could struggle to grow. When you sow too few, your lawn will come in thin. Your seed product has a recommended seeding rate, so use that as your guide.

If you spray a DIY vinegar solution that contains high salt, it can disrupt the soil's structure and make it difficult for plants to grow. That's why it's vital to avoid spraying vinegar solution on areas where you are trying to grow plants and flowers. When using a mix of vinegar and soap, some say you can plant a few days after the vinegar dries. 

There are several best practices you can do to keep your lawn looking healthy. Knowing when to water grass is among the most important. Having your sprinkler timer set to early morning is best because it gives your grass and plants enough time to absorb water before the sun and wind can evaporate it. To maximize a sprinkler’s impact, aerate your lawn once or twice per year. Doing this achieves better absorption and stronger root systems for your grass.

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.