How to Trim Primrose
Primroses (Primula spp.) show up in late winter to early spring, providing prolific blooms in shades of red, pink, yellow, blue and white suspended over dense clumps of leathery leaves. The most common primroses are English primrose (P. acaulis and P. polyantha), florist's primrose (P. obconica) and fairy primrose (P. malacoides). Thriving in U.S. Department of Agriculture plant hardiness zones 4 through 9, primroses need shade and mulch when grown in warmer climates. A suitable perennial for borders, mass plantings, rock gardens and woodland gardens, clumping primrose only requires trimming to prolong blooming and eliminate dead plant material.