Good thing you posted again. What happens with this forum is if you post a new message and leave it alone, it will remain at the top of the forum for several days while people decide whether they want to reply. What you did was immediately post more pictures. That released your message to drift down through the milieu of new posts right away. Your post today bumped it back to the top. You overseeded with bermuda on June 1 and less than a month later you are concerned about it not filling in. Is that correct? I would say, come back in a month and see if you have the same questions. How are you watering now? How often and for how long? It is time to fertilize with organic fertilizer. I would suggest using Milorganite as the bag rate. Milorganite is an organic that will not hurt your grass and will improve your soil. Typically centipede grasses thrive in the poorest of soils, so the Milorganite will be a good first step in reviving it. In August you can probably start in with the Bermuda Bible recommendations on fertilizer. With that soil you might want to alternate monthly feedings between organic and chemical for a year. All this fertilizer and water will kill off any vestiges of centipede you might have still hanging on.

With blooms it is like Goldilocks...it's too hot,it's too cold, it's too dry,it's too wet,not enough sun,too much sun...all of these things can have an effect on different blooms in different ways. As for newer seedlings,they need several years,as a rule, to show their best bloom ability.

That's great! I have one clump of no shows, can't remember what they are. I learned the hard way, and most transplants I lose a season of bloom. Some other ones even if I don't get them planted exactly right, they eventually do their own thing and bloom. I think it helped some to bloom faster once I read on this forum to leave some rhizome exposed and trim. But one huge bunch I planted too deep took 3 years to bloom and now they are too many for where they are, blooming like crazy.

Most all grasses grow best with a soil pH between 6.2 and 6.8. If you have your own pH meter how well that will work and whether it will really give a good reading depends on many things, but mostly those are not very reliable. Organic "fertilizers" can give the same results as the synthetic fertilizers but what you want to do is make the soil into a good and healthy soil that will grow strong and healthy plants without the need for "fertilziers". Contact your county office of the North Carolina state University USDA Cooperative Extension Service about having a good, reliable soil test done so you know what your soils pH is and what the base nutrient load is and then dig in with these simple soil tests, 1) Structure. From that soil sample put enough of the rest to make a 4 inch level in a clear 1 quart jar, with a tight fitting lid. Fill that jar with water and replace the lid, tightly. Shake the jar vigorously and then let it stand for 24 hours. Your soil will settle out according to soil particle size and weight. A good loam will have about 1-3/4 inch (about 45%) of sand on the bottom. about 1 inch (about 25%) of silt next, about 1 inch (25%) of clay above that, and about 1/4 inch (about 5%) of organic matter on the top. 2) Drainage. Dig a hole 1 foot square and 1 foot deep and fill that with water. After that water drains away refill the hole with more water and time how long it takes that to drain away. Anything less than 2 hours and your soil drains too quickly and needs more organic matter to slow that drainage down. Anything over 6 hours and the soil drains too slowly and needs lots of organic matter to speed it up. 3) Tilth. Take a handful of your slightly damp soil and squeeze it tightly. When the pressure is released the soil should hold together in that clump, but when poked with a finger that clump should fall apart. 4) Smell. What does your soil smell like? A pleasant, rich earthy odor? Putrid, offensive, repugnant odor? The more organic matter in your soil the more active the soil bacteria will be and the nicer you soil will smell. 5) Life. How many earthworms per shovel full were there? 5 or more indicates a pretty healthy soil. Fewer than 5, according to the Natural Resources Conservation Service, indicates a soil that is not healthy. to see what else needs be done with your soil to make it into that good, healthy soil that will grow strong and healthy plants. Here is a link that might be useful: NCSU CES