A well planned out balcony garden design does not have to cost much and require a great deal of space. Find plants that can thrive in the light you have in your balcony, then try using shelves or walls to avoid filling up the space. Greenery can be blended with colorful flowers to achieve a well-rounded and colorful appearance. I also believe that there are some decorative touches, such as lighting or small pots, and some comfortable seating that gives the space the feel of a tranquil outdoor getaway.