03/11/2026
A well planted foundation bed transforms the entire exterior of a house, and this one works because every decision from the stone edging to the plant selection was made with layering and color sequence in mind.
The dry stacked stone border along the lawn edge is what defines the bed and gives it its structure. You do not need mortar for a border like this. Source fieldstone or granite from a local landscape supplier and stack it two to three courses high, leaning each course very slightly back into the bed. The weight and angle hold it in place. This kind of border also raises the bed several inches, which improves drainage right against the house foundation, where water tends to collect.
Keep all plantings at least 18 inches from the house siding. This allows air to circulate, prevents moisture buildup against the structure, and gives plants room to grow without pressing against the wall.
The planting follows a clear three layer system. Tall plants at the back near the house, medium plants through the middle, and low spreading plants at the front edge spilling toward the stone.
At the back, delphiniums provide the tall blue vertical spikes that anchor the color palette. Stake them individually when they reach about 18 inches or they will flop in summer storms. Behind them, closer to the house, the bed benefits from the warmth the siding radiates, which is why marginally tender plants often do better in foundation beds than elsewhere in the garden.
The middle layer uses rudbeckia, also called black eyed Susan, for the bright yellow daisy flowers, catmint for the purple haze, and hostas for bold foliage contrast. Hostas are doing significant work here. The variegated variety with cream and green leaves breaks up the color without competing with the flowers, and it stays attractive even when nothing around it is blooming.
Dusty miller, the silver foliage plant at the front left, is one of the most underused edging plants available. It costs almost nothing, tolerates heat and drought once established, and makes every color next to it look more saturated. Use it generously along the front edge.
Impatiens fill the front with coral pink color and they are one of the few reliable bloomers for shadier foundation beds that get limited direct sun. New Guinea impatiens handle more sun than standard varieties and produce larger flowers if your bed gets more than 4 hours of direct light.
Sweet alyssum at the very front edge tumbles toward the stone and self seeds reliably each year once you establish it. Plant it once and it largely takes care of itself.
The window boxes above tie the entire planting together vertically. Fill them with trailing ivy, upright geraniums, and something white and cascading like bacopa or white lobelia. The formula for a good window box is one thriller plant that grows upright, one filler that mounds, and one spiller that trails over the edge.
Refresh the annuals every spring and divide the perennials every three to four years when they start to crowd each other. Beyond that this style of border is largely self sustaining.