The “Happiness Overload” daylily—likely referring to one of the beloved reblooming yellow daylily varieties such as “Happy Returns” (one of the most popular continuous-blooming daylilies in the world) or its larger cousin “Big Time Happy”—is an incredibly tough and vibrant perennial. Daylilies get their genus name (Hemerocallis) from the Greek words for “beauty” and “a day,” because each individual flower opens in the morning and lasts for only one day. However, these “happiness-inducing” rebloomers make up for it by producing dozens of flower buds on multiple stems, giving you non-stop sunny blooms from early summer all the way until the first fall frost. [1, 2, 3, 4, 5]
Key Characteristics at a Glance
- Flower Color: Canary or clear lemon-yellow.
- Bloom Time: Early summer through autumn (with regular deadheading).
- Mature Size: Grows to roughly 15 to 18 inches in height with a spread of 18 to 24 inches.
- Hardiness Zones: Thrives in USDA Zones 3–9.
- Special Features: Diurnal (blooms open during the day), mildly fragrant, drought-resistant, and deer/rabbit-resistant. [1, 2, 3, 4, 5, 6]
