Beyond the Healing Brush

First, I made the background copy layer and erased the chair out.

I made a selection using the Polygonal Lasso Tool.

Then, in order to cover up the chair with grass from other areas of the photo,

1. I used the Polygonal Lasso Too to make a selection of the part of the chair

2. I made the copy of the seletion

3. I pasted it into a new layer

4. I moved the layer until it covers up the chair

Then I repeated these steps.

I used eraser Tool and the Healing the brush to fix some small bits.

Repeating steps part was easy, but it was hard to make natural, grass.