Can You Apply Weed Killer Before Seeding?

Can you apply weed killer before seeding? You can spray it anytime you want leading up to seed day, and on seed day, but once your seeds germinate, you should NOT spray it again until the new gras has been mowed 2-4 times or 4 weeks whichever is longer.

How soon can you put weed and feed on new grass seed?

After overseeding, wait until your third mowing occurs. For sodding, sprigging or plugging, wait four weeks before you weed & feed so new grass can start without delay.

Can I put weed and feed and grass seed down together?

Weed and feed fertilizers are often used in combination with seeding. The herbicide will weaken the grass as well as the weeds and the fertilizer will strengthen the weeds as well as the grass. When applying seed over a weed and feed application, remember that some weed and feeds can prevent grass seeds from growing.

Should I weed or seed first?

Many of our clients often ask us the question, “Should I plant grass seed or kill the weeds first?” The answer is rather simple. The weeds should be killed first. Any weeds and poor looking grass around the lawn should be killed before any seeds are planted.

How long after applying crabgrass killer can I plant grass?

Pre-emergent Crabgrass Killer

Some crabgrass preventer manufacturers recommend waiting at least four months after applying the product before planting grass seed. Crabgrass preventers work by killing the annual weeds when they first poke out of the seeds, immediately after germination.


Related faq for Can You Apply Weed Killer Before Seeding?


Can I apply fertilizer after weed killer?

After spraying the weeds with herbicide, it is good practice to wait at least one week before fertilizing. In fact, your grass needs fertilizing even through the fall and winter. A good rule of thumb is fertilizing at least four times a year, such as every two months during fall, winter and spring.


How soon after fertilizing can I plant grass seed?

You can plant grass seed immediately after applying fertilizer. Please make sure there is no weed preventer in the fertilizer, as this will also prevent the grass seed from germinating.


How long do you have to wait to fertilize after seeding?

At about 4 to 6 weeks after the seed germinates fertilize the lawn with a high quality turf fertilizer that is predominantly nitrogen. Once turf is 4 to 6 weeks old or older, nitrogen is the most important nutrient for a healthy, attractive stand of grass.


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