Homeowners and novice designers frequently commit several detrimental landscaping mistakes that compromise plant health and property aesthetics. Among the most common errors are planting trees and shrubs too deeply (burying the root flare), placing flower beds too close to the house foundation without proper grading, overwatering or underwatering lawns, selecting invasive or non-native plant species that struggle against local climate conditions, neglecting soil preparation and pH testing, and overcrowding plants so they compete aggressively for nutrients, sunlight, and airflow as they mature.