Plant spacing refers to the distance between individual plants in a garden or field. Proper spacing is essential for healthy growth, as it allows plants to access sunlight, water, and nutrients without competing too much with each other. Different types of plants require varying amounts of space, depending on their size and growth habits. When planning a garden, it's important to consider the mature size of each plant. For example, tomatoes need more space than lettuce because they grow larger and spread out. Following recommended spacing guidelines helps ensure that plants thrive and produce a good yield.