This is my lawn. As you can see it has a carpet of dandelions. In previous years I would treat my lawn with Weed & Feed to get rid of them but it's now illegal to sell the stuff. I tried vinegar one year - it stank but killed the weeds...sort of. They came back with a vengeance. I've tried various sprays to kill them but none have been very effective. Obviously.
One large problem I'm having is that the city has stopped treating the dandelions on city property which means there will be seeds everywhere. Another large problem is that J is allergic to them and it makes his grass cutting experience a nightmare. I very much want to get rid of them but lack the patience to pluck out each plant individually. In my laziness I started to really look at my lawn.
I noticed the dandelions were much more sparse in the shade. The grass is also much thicker in the shade. Are the dandelions choked out because the grass is thick, or do they just do better in the sun? Probably a combination of both. I checked online and discovered that grass likes sweet soil and dandelions like acidic soil. This is where I got the idea for my experiment.
We have lots of ash left over from the fire pit and spreading it in the ground sweetens the soil. I bought some grass seed and a seed spreader, mixed the ash with the seed, and spread it all over my back lawn. I'm hoping that by over seeding the grass it will choke out the dandelions while the sweeter soil will create a hostile environment. Of course I now have to water my lawn at least once a day to get the seed to take, but hopefully it will be worth it.