Is it safe to assume that the silence from the forum means that my plan makes sense and is on track? :D Was really hoping to hear from someone! :)

All the tips are mowed off, so it's impossible to tell. Next time you take a picture of grass, can you wait until a cloud goes over head to reduce the contrast? Also if you put a dime or quarter in the picture for reference that would help. The grass appears to be coarse bladed like St Augustine or centipede. Here is a picture comparing those. Note that the centipede (top) has pointed blade tips. St Aug has blunted tips. Centipede normally grows under very poor conditions. It like acidic soil with zero fertilizer, low mowing, and little water. St Augustine will grow in acidic soil but it seems to do very well in higher pH conditions. It likes lots of care and will spread to fill under all but very dry conditions. I have about 3,000 square feet more St Aug than I had when I bought my house 3 years ago. It spreads by over ground runners. They grow about 5 feet in the spring and 5 more in the fall. St Aug should be mowed at the highest setting.

Can't see any of your pictures. When you write back with good links, please mention where you live and what kind of grass you have.

Hi, Wild onion is resistant to weed killer because of the glossy leaves. So if your lawn doesn't need to be mowed. You need to take a stroll around your yard (neighbors may think you're nuts, lol)crushing the leaves. Then apply your weed killer. I would make sure that allium is on the list of weeds that your Preen product says it kills or go out and buy a product that says so. Remy