Foreground plants are a nice expression in any setup while not required the word more details the growing conditions of the plants in this category to help you understand where to plant them so you can enjoy them, more or less. Shorter plants with high to medium light requirements make up the majority of foreground plants, however, this rule is not cut and dry. For instance, depending on the size of your tank and the look you desire mid ground plants could be scaled up to become the foreground plants as well. But as a rule, any low growing plant is what we agree to be considered a foreground plant.