The right shrub planting distance from house walls is at least half the plant's mature width, plus 6 inches for airflow. For most shrubs, this puts you 3 to 5 feet away from the foundation. Plant any closer and you're asking for moisture damage, pest problems, and a removal job within a few years.
I made this exact mistake when I first bought my house. I planted a row of burning bush shrubs just 18 inches from the front wall because they looked small in their nursery pots. Within three years, those plants had grown into the siding and blocked two windows. Moisture got trapped behind the branches and I started seeing mildew on the house walls. I spent a full weekend ripping them out and replanting at the right foundation planting spacing. That project cost me twice what I would have spent doing it right the first time.
Getting your foundation planting spacing wrong causes four big problems. First, branches that press against your walls trap moisture and create rot conditions on wood siding. Second, blocked airflow behind dense foliage keeps everything damp and invites mold growth. Third, shrubs touching the house create a direct path for ants, termites, and other pests to walk straight into your home. Fourth, roots growing close to the foundation can crack older masonry or clog drain tiles over time.
The University of Georgia Extension makes one point very clear. Plan your distance based on mature size, not nursery pot size. That cute shrub in a one-gallon pot may reach 6 feet wide in five years. They call this misjudgment the most common foundation planting error homeowners make. Always read the tag for the full-grown width before you dig.
Here's the simple formula I now use every time I shop for foundation shrubs. Check the plant tag for mature width. Divide that number in half. Then add 6 inches for air to move between the shrub and the wall. A shrub with a 6-foot mature width needs at least 3.5 feet of clearance from your house. Write this number down before you drive to the nursery so you don't get tempted by oversized plants.
Good shrub placement guidelines also mean thinking about what sits above and below your planting spot. Don't plant under windows unless the shrub stays below the sill at full size. Stay away from buried utility lines or septic areas too. Keep a clear path of at least 2 feet between the shrub edge and any walkway. Your visitors need room to pass by without brushing against branches or getting scratched up.
Watch out for a few common varieties that outgrow foundation spots fast. Burning bush can hit 8 feet wide in just a few years. Forsythia spreads even wider and sends out arching branches that touch your walls in no time. Lilac grows tall and broad enough to swallow a front porch. If you love these plants, put them in the open yard instead and save the tight spots near your house for compact growers like dwarf boxwood or small spirea.
Following these shrub placement guidelines saves you from the removal headache I went through. Measure twice, plant once, and your foundation plants will look great for 10 years or more without crowding your home. A few extra minutes with a tape measure today prevents expensive fixes down the road.
Read the full article: 10 Easy-Care Shrubs for Effortless Landscapes
