using clone stamp tool
The two pictures I added show my index image with a photo of a sunset with weeds in the foreground. I wanted to remove the weeds for the header I wanted to create for the other pages of my website. To get rid of the weeds:
Select Clone Stamp tool
Press ALT while hovering over the area you want to clone
Release ALT and move to the area who you want to remove and replace with the cloned area
Select this area using the mouse and move around to edit your image.
After this is done, like in my case, I had to use the Smudge Tool to blend the colors around, since you can see that the background color is not uniform across the picture. (it fades from lighter pinks to darker purple across the horizen moving in a left-ward direction)