Add a mask to this layer and use a soft black brush to remove the part in the middle, making the branch fade into the background.
Apply a Gaussian Blur of 15 px to make it softer and integrated with the background.
Duplicate this layer and change the mode to Overlay 80%. Right click this layer, choose Delete Layer Mask and use Ctrl+T to place it in the bottom right of the canvas. Change the radius of the Gaussian Blur filter to 12 px.
Isolate the branch 4 and place it in the top left of the main document. Apply a Gaussian Blur of 15 px to this layer.
Create a Hue/Saturation adjustment layer to change the leaves' color:
Make a Curves adjustment layer to darken the branch. On this layer mask, paint on the leaves on the front to reveal the lightness there.
Isolate the model and place her in the middle of the canvas.
Create a Hue/Saturation adjustment layer and change the Saturation values to -33:
Add a Color Balance adjustment layer and alter the Midtones settings. On this layer mask, use a soft black brush with the opacity about 10-15% to reduce the effect on the neck and shoulder.
Make a Curves adjustment layer and increase the lightness. On this layer mask, use a soft black brush to erase the front of the shoulders and face so they won't become too bright.
Isolate the flower image and add it to the head of the model. Use Ctrl+T with the Warp mode to bend it as shown below:
Add a mask to this layer and use a hard black brush to erase the part on the forehead and the top of the head.
Drag the flower from the original image to our working document again and place it onto the existing one. Use Ctrl+T with the Warp mode to tweak it a bit.
Add a mask to this layer and use a hard black brush to remove the part on the forehead and both sides of the ears.
Use the Magnetic Lasso Tool (L) to select a bud from the flower image to add to the area above the left ear of the model. Set this layer below the flower ones.
Select another bud to add to the right of the model's head and then duplicate this layer. Use Ctrl+T to resize it to be smaller to add to the higher position than the first one.
Create a new layer and activate the Clone Tool (S) . Use a cloning brush with the opacity about 40% to reduce the highlight on the buds.
Select all the flower , bud and cloning layers and hit Ctrl+G to make a group for them. Change this group's mode to Normal 100% and add a Hue/Saturation adjustment layer and alter the Master values:
Make a Curves adjustment layer and increase the lightness. On this layer mask, use a soft black brush to remove the light on the right and any details you feel too bright.
Make a new layer below the flower group and use a small brush with the color #3d3357, the opacity about 33% to paint shadow for the buds on the model's face.
Open the leaves image and take a leaf to add to the model. Go to Filter > Liquify and use the Forward Warp Tool (W) to tweak the leaf into a curve. Place this curve onto the model's back.