Last weekend I added some top soil to my mostly bare lawn in Central Florida, and then put down 2/3 bahia grass seed and 1/3 rye grass seed. Already the seeds (I'm guessing the rye) are an inch high. I realize now, though, that it would have been better to enrich the soil with amendments like alfalfa pellets or soybean meal a few weeks prior to putting down the new grass seed.

My question is:
Would it be alright if by mid-October I put down either alfalfa or SBM? Would that hurt the new growth in any way? Or better to wait until February/March, and start with the program of corn gluten meal, then alfalfa and/or SBM applications throughout the rest of the growing season? A soil test is also on my to-do list.

Thanks in advance for your recommendations.