Question
I have a yellow rose bush and the color is a pale yellow, is there anything I can add to the ground to make it a deeper color?

Answer
The shade of colour of a rose depends on a few things such as your soil, the weather and the fertilizer you give it. Sometimes a rose will be a paler colour in the spring and a deeper one in the fall. The reason for that is because the weather is usually cooler in the fall and this can make some roses go a deeper colour. Even lack of water can pale out a rose's colour. However there really isn't anything you can do to change the colour or shade of a rose.