Building a Fieldstone Border for a Foundation Bed

For a 5-inch-tall fieldstone border along a house foundation: yes, dig a 6–8 inch trench, compact the subgrade, and add 4 inches of compacted crushed stone base. Mortar is only needed if stacking stones vertically; dry-laid on edge (long side down) is stable without it. Manmade stone (like Bradstone) costs less and matches color uniformly but lacks natural variation.

Set stones tight, level each course, and backfill with soil. No cement behind the wall—drainage matters more. Use landscape fabric behind stones to keep soil from washing through joints. This dry-stacked method flexes with frost and lasts 20+ years.