Rosemary (Rosmarinus officinalis) is a hardy, aromatic perennial herb native to the Mediterranean region. Proper spacing is critical for its health, growth, and productivity. When planted too closely, rosemary plants compete for sunlight, water, and nutrients, leading to stunted growth and increased susceptibility to diseases. Conversely, adequate spacing ensures optimal air circulation, reduces pest infestations, and allows each plant to thrive.
The recommended spacing for rosemary plants depends on their growth habit and intended use. For most varieties, spacing 24 to 36 inches (60–90 cm) apart is ideal. This distance accommodates their mature size, which typically reaches 2–4 feet in height and width. If planting in rows, maintain 36 inches between rows to allow for easy maintenance and harvesting.
Several factors determine the exact spacing for rosemary plants:
Incorrect spacing can harm rosemary plants in multiple ways:
For potted rosemary, select a container at least 12 inches in diameter per plant. Ensure drainage holes to prevent waterlogging. If planting multiple rosemary plants in a large container, space them 12–18 inches apart to avoid root entanglement.
Rosemary benefits from companions like sage, thyme, and lavender, which share similar growing conditions. When interplanting, maintain 18–24 inches between rosemary and other herbs to balance resource sharing without overcrowding.
Rosemary is a long-lived plant that can grow for decades. Account for its mature size when spacing young plants. Prune annually to maintain shape and prevent overgrowth into neighboring plants. In landscapes, rosemary can serve as a low hedge or border when spaced 18–24 inches apart.
