Hi mkroher; For broadleaf weeds, you may want to try watering in some non-sulfured molasses. When it comes to these type of weeds, molasses is great because most broadleaf weeds need high nitrate levels. When you add molasses, you get bacteria, and some fungi growing, but mostly bacteria. These organisms take up nitrate and turn it into biomass, so the weeds will be less able to compete with the desired plant. When you have sour grasses, like quack grass, crab grass, foxtail, nutgrass, goosegrass, johnsongrass and barnyard grass, those are a lack of a signal, a lack of the calcium signal. I use various protein meals on my lawn and flower beds, corn gluten meal in the spring and late summer. Also soybean meal and alfalfa meal along with Schafer Organic Fish Fertilizer that is a hydrolysate that is made from fresh water fish and has a Ca content of 12% for those of you that need to add Calcium to your soil. http://www.schaferfish.com/fertilizer.html The use of corn gluten meal in conjunction with proper cultural practices of mowing high and watering deeply but infrequently controls 95% of most weed problems. With most weeds, their sensitive growing part is the tip or top of the plant. Repeated mowing is like cutting their heads off and after a period of time, the plants eventually weaken and then die off. The use of a weed hound will make short order of existing dandelion plants! I also highly recommend using KIS compost tea brewers. I use their 5 gallon brewer on my plants. By having the right soil biology, you will not have and grub problems, period. As well as with a balanced soil, any weed problems will disappear as well. But don't forget, weeds are telling you what's missing in your soil. Some people have gone to the trouble of having their weeds tested, and have found to be high in some trace mineral. And then having the soil tested, it is found that the soil is lacking the trace mineral that was high in the weed. The weed is accumulating the mineral for you and trying to make it biological available for the soil. Unless you soil has been damaged by chemical use or by flooding, you may not have to add topdressing to your soil. The use of AACT in conjunction with protein meals and fish, you have all you need for your soil to be healthy and look great. I also add seaweed and humic acid periodically through the course of the year to bring out the best in my plants and make them more stress resistant.