Controlling Stella d'Oro Daylily Size: Don't Trim, Divide Every 3-4 Years

A gardener's 3-year-old Stella d'Oro daylilies get taller/wider each year; wants to control size without digging. Asked if trimming 2-inch-high shoots hurts the plant.

Advice

Tom said Stella d'Oro maxes at 18–24 inches. Don't trim until fall; then cut in fan patterns like iris. Foliage gathers energy for next year's blooms. Dig and divide clumps every 3–4 years to prevent crowding and reduced flowering. Share extras.

Follow-Up: Best Division Time

Early spring or September are best; they're tough and can be moved most times if necessary.

Division, not trimming, manages daylily size and vigor.