Hemerocallis x hybrida 'Joan Senior Jumbo'

Garden hybrid

Hemerocallis x hybridaDaylily

70 other cultivars

perennial

Joan Senior Daylily

Hemerocallis x hybrida 'Joan Senior Jumbo'

The Story

Plant Bio

Hemerocallis 'Joan Senior Jumbo' is a large, fragrant daylily known for its stunning white flowers with a soft yellow throat.

This cultivar features larger blooms compared to standard daylilies and has excellent reblooming capabilities.

Uses & Benefits:

Vivid, large blossoms make it a favorite for garden borders and containers, providing vibrant color and visual interest.

Easy to grow and maintain, suitable for beginner gardeners, with low water needs once established.

Supports pollinators like bees and butterflies, contributing to garden biodiversity.

SpeciesHemerocallis x hybridaDaylily

Essentials

At a Glance

Plant Type

Perennial

Height

25 inches

Width

24 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9, 10

Water

Moderate, drought tolerant once established

Humidity

Average garden humidity

Lifespan

Perennial

Native To

Asia

Toxicity

Toxic to cats; non-toxic to humans and dogs

Planting

How to Grow

Tuck seeds or divisions into well-drained soil in early spring.
Water thoroughly after planting to establish roots within 2 weeks.
Fertilize with a balanced fertilizer every 4-6 weeks during growing season.
Mulch around plants to retain moisture and suppress weeds.
Prune back dead foliage in late fall to encourage new growth.
Divide clumps every 3-4 years in early spring for optimal health.

Pro Tip

Plant in full sun for best flowering; ensure good drainage to prevent rot.

Keep It Thriving

Care Guide

Do

Water regularly, especially during dry spells 💧
Apply fertilizer in early spring and mid-summer 🌱
Remove spent flowers to encourage reblooming
Mulch to conserve moisture and control weeds
Divide clumps every 3-4 years for vigorous growth

Don't

Avoid overwatering to prevent root rot ❌
Don't plant in heavy, poorly-drained clay soil
Refrain from excessive fertilizing which can cause floppy blooms
Never ignore pests or disease signs
Avoid pruning in late fall, wait until early spring

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Divide
Fertilize
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Bright perennial border with vibrant bloomsColorful container display on patiosEnergizing garden accents with tall flower stalks

Companion Plants

Salvia CoreopsisDaylilies Russian Sage Lavender

Multiply

Propagation Methods

Good to Know

Common Questions

Joan Senior Daylily questions

What zones can Joan Senior Daylily grow in?

Joan Senior Daylily is hardy in USDA Zones 4–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Joan Senior Daylily deer resistant?

Not reliably. Deer may browse Joan Senior Daylily, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Joan Senior Daylily bloom?

Joan Senior Daylily typically blooms in early to mid summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Joan Senior Daylily need full sun?

Joan Senior Daylily does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Joan Senior Daylily drought tolerant?

Yes — once established (usually after the first full season), Joan Senior Daylily handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.