When to Plant Daylily in Pennsylvania

Growing Daylily in Pennsylvania: Complete Guide

Daylily (Hemerocallis spp.) is planted as nursery stock — a container-grown or bare-root plant from a garden center, not seed. Depending on your zone, the ideal spring window in Pennsylvania falls between March 20, 2027 (Zone 8a) and May 10, 2027 (Zone 5a); early fall works too, once summer heat breaks.

Because Pennsylvania stretches across 7 USDA hardiness zones (5a, 5b, 6a, 6b, 7a, 7b, 8a), planting windows can shift by as much as six to eight weeks from one end of the state to the other. Gardeners in the warmer southern zones can start earlier, while those in cooler northern zones should wait until the zone table above shows their last frost has passed.

With 90 days to maturity, Daylily fits comfortably within Pennsylvania's growing season in most zones. In the warmest parts of the state, a second planting later in the season may be possible.

Daylily requires full sun to part shade and low to moderate moisture. In the Northeast, cool summers and moderate humidity can slow warm-season crops, so choose a sheltered, south-facing spot to maximise heat.

For the most precise planting dates tailored to your exact location, enter your ZIP code on our planting calendar or use the zone table above to find the schedule for your area of Pennsylvania.