Garden stakes support your trees, shrubs and plants in an upright position so they are able to develop into taller, straighter and stronger plants. Stakes also protect weaker plants from being knocked over or broken by harsh winds, rain and snowstorms. Garden stakes provide encouragement to new sapling trees and shrubs, tomato plants and heavy blooming plants such as lilies. Garden stakes can be purchased in wooden and steel designs. Many secure the plant to the stake with tie ropes; while others are designed in a coil style so that they completely encircle the plant. Garden stakes can be purchased online for between $10 and $25 for a box of approximately 10 stakes.