I don't know if this might be fern leaf Cosmos or something else. No blooms so far even though this has been growing in my garden bed since February. I actually kind of like it because it's fernlike leaves are so soft and light. Almost like a feather. It is about 3 1/2 ft. tall right now. Is growing in full sun in the heat of Florida without wilting. Not sure if it is a weed or something much nicer. I have actually thought about digging it up and planting it in a medium to large sized pot because as you can see in the photo, it grows into a small bushy form. I know that it is NOT a dill plant, because I grow that too.
Please help me ID this interesting plant. Below is a photo: