Can a lawn be seeded and fertilized at the same time?

Answer 1

Yes, but only if the level of fertilizer application is very low. If a normal application of fertilizer is applied it will tend to damage the germinating grass seeds. It's usually best to fertilize, water well and then seed at a later date.

Answer 2

The only thing you can NOT do is overseed within 30 days of a weed treatment, because the weed treatment will interfere with seed germination.

Other than that, a starter fertilizer would absolutely help so the answer is Yes, but I would recommend the use of a starter fertilizer vs. a growth stimulant type of fert.
You may wish to conduct a soil test first, to see if your lawn needs more than that.

Specifically, there exist three numbers on a bag of fert, such as 10-10-10, for example.
The first number is nitrogen, and if this first number is high, that is a growth stimulant and would be used for established lawns.
The second number refers to potassium, and for a starter fertilizer you would be looking for one with a high middle number.
I can not recall what the third number is about, but as a rule it tends to be low and for a starter fertilizer, something along the lines of 15-30-10 is what you would want.
Keep in mind, these numbers are percentages!
You would want, as a rule, a 30 percent concentration per 1/4 acre of turf (so one 40 to 50 pound bag of 15-30-10 is enough for 1/4 acre). You could, in a pinch, use three bags of 10-10-10, but this will add considerable growth stimulant as well.
In addition, you may wish to add to this 40 pounds of lime per every 10 percent of high number per bag fertilizer, so that the magnesium in the lime can help release some of the inactive ingredients in the fertilizer.
In the above example (1/4 acre) 3-4 bags of lime should be enough.
If your soil has clay in it / is clay-based, 3-4 bags of gypsum (commonly called clay buster) would help even more, and even without clay, the calcium sulfate contained in gypsum helps considerably as well.
That is all somewhat dependent on the results of the soil test, following soil test result recommendations would most likely yield better results.

Answer 3

yes, just dont over do it with the fertilizer. it will burn the sprouts up. fertilize after the grass is about mowing height. mow first , then fertilize.

also, dont mix the seeds and fertilizer together and spread. it wont hurt the seeds, but the seeds tend to float(lighter) to the top of the mix. it results in an uneven stand.