There are sycamore trees on the side of the road in this city, there leaves are green and there is also some fruits blooming like dandelions puffing in the wind.

Love it. There are sycamore trees beside the road in this city. The leaves are green. They have fruit now. The fruit are like dandelions, puffed in the wind. Just a few small changes and you are good to go. :) Capital letter to start sentences. "fruit" is collective, so you generally don't need a plural on "fruit". "Beside the road" is fine. Or "by the road". Or "along the road". The leaves are green. is fine, or Their leaves are green.