Hi

I have grown these marigolds from seed and they have grown beautifully. They are already around 12-15 inches tall and I ended up having too many. So I was thinking of putting some in my front yard in front of the hydrangeas. Infront of the marigolds - will go the trailing petunias. This part gets sun upto 6-7 hours a day. Would this be enough? Also how big do these plants get? I dont want them to overtake everything in that patch.

Thanks