Banana peels provide your rose bush the needed potassium. Chop them up and mix into the soil.
Used Coffee and Tea grounds - Roses, as well as Azaelia, thrive on more acidic soil. The coffee and tea is an inexpensive way to help them. Spread the grounds into the surface of the soil around the main bush trunk/branch.
Egg Shells - roses need calcium as well. But before you crush up those egg shells, be sure to microwave them first for 15 seconds to kill any impurities. Crush them after cooling.