Question
Hello Charlotte,
I hope you can help me out.  Here is the issue.
I built my home in September last year.  Told them not to sod the backyard b/c I wanted to save money and buy seeds.  They poured sand in my backyard and I racked it so i could lay the seeds.  Seeds are down and the rye grass has grown nice and tall.  I used Rye b/c Bermuda would not have grown around that time.  My lawn has spots in it from the Rye grass implementation that is really hard to fill.  Now its time for Bermuda.  I have layed the Bermuda seed.  Watered and no growth.  This has been a two week process and surely some growth should have started.  I dont know the mfg of the seed right off hand.  I want to get rid of the spots.  Have a thick and beautiful lawn like on the commercials. :-) And I am ready to stop being cheap about it.  That is why I am coming to you.  Teach me ole wise one.

Answer
well,,,, ordinarily, the saying is,,, "Oh wise one", but in my case,Ole wise one fits.LOL
Ok, lemmee get me turban adjusted.@:-)
I hates rye grass!!!
Annual rye is not so bad, to plant in the spring so you get an early start on a lawn sooner, but I have St. Augustine, and my grass gets green real early. I live in north Texas, and we seldom have hard winters.
Rye is a cool weather grass, and when the temp gets up in the upper 80s, it dies out. Perenial rye comes back year, after year, after year, and I consider it a weed.
It goes to seed fast, and is clumpy,,,,just don't care for it, so I don't know a lot about growing it.
Burmuda is a native grass here, so it is just here, and since it spreads by runners, good care will cover a yard fast.If you live where there are cold winters, your soil may not have been warm enough yet, to plant Burmuda.I think it takes 2 or 3 weeks for burmuda seed to germinate, and it would probably be another week before it poked it's lil head above ground.
I also don't plant seeds. the $%%$&^ birds always eat most of it. I put out seed in a bunch of feeders, they get fruit off my trees.So I am not going to serve them a salad buffet too.
I plugged in my St. Augustine. When I do put in Burmuda, I plug that in too, keep it watered well, and mow it about twice a week. That makes it spread faster.
Water to at least 6 inches, and water again when the top 2 inches are dry.
When I am trying to get a lawn to spread fast, I don't let the top 2 inches get completely dry.
Set your mower on it's lowest setting. The shorter you cut it, and the more often you cut it, the faster it  will spread. When the weather starts to heat up, around the middle or upper 80s, set the mower at a higher setting. The taller blades protect from heat, by shading the root system.
I don't know what area you live in, so I don't know what climate you have to deal with, or what other grasses grow in your area. Burmuda is a nice grass, and if you cover it with stray, to keep the birds out of it. Since I don't seed, I don't know how to do that. You would have to rake the straw off before it smothered the grass, though.
I use sugar, not fertilizer. Have you read my other answers about using sugar or dry molasses.
I went organic about 10 years ago, and I spend less, work less, and have a much better lawn and garden than i did when I was using chemicals. Fertilizer kills some beneficial microbes that enrich the soil. dry molasses, or sugar if you can't find the molasses, keeps them alive.
If yiu use fertilizers, you should still use sugar. Put down the fertilizer, then broadcast sugar, and water them both in well, together. You will maximize your feeding benefits.Weeds like poor soil, they will not thrive in rich soil, so they will come up, but will not thrive,and mowing will in a few weeks, just get rid of them.My weeds (crabgrass, johnson grass, dandelions, chickweed etc) came up for the first couple of years, less of them each year. In about 6 years, they don't even come up.
The lawn gets mowed, edged and watered. That is all the work we have to do on the grass.I throw some sugar in the flower beds too. I don't get the grass weeds, or the chickweed, or candelions, but trees still get seeded in. I have to dig those out with an asparagus cutter, as soon as I see one.I strew chopped up lemon peels in my flower beds to keep cats out. I don't like the surprises they bury in there for me to dig up. Works better than any commercial product I tried, and I tried them all.
Talk to a nurseryman in your area. I would think the burmuda will choke out the rye.
Check on the temp the soil has to be too. Bet it was still a little cool for it to germinate.

Hi neighbor!!! I am your neighbor to the West. I live in Irving.
As cool as it has been, it may be a little too early for burmuda to come up. Give it a little longer, or start plugging in st. augustine.