To add a Photo Filter, click on the Adjustment Layer icon at the bottom of the Layers palette.

Fill in the parameters in the Adjustments palette.

Don't forget to change the name of the Color Filter Layer; just double-click on the name and type in the new one.

Use the Layer Mask (no need to add one; it's already there) to color the image. Here, I add all black paint to the Layer Mask and then use white paint to create the mask and color the leaves green.