How to Grow Daylilies Canada

By the SoilCommander Editorial Team, under the guidance of Nitin Sharma, Co-Founder · · How we check our facts

On this page
  1. Daylily (Hemerocallis fulva)
  2. Quick Facts
  3. At a Glance
  4. Diseases
  5. Pests
  6. Growth Stages
  7. Harvest & Storage
  8. Plan your Daylilies planting
  9. Growing Daylily in another region
  10. Sources
  11. Frequently Asked Questions

Daylilies aren't usually grown from sown seed — established clumps are divided and replanted instead.

Core growing advice on this page is checked against named horticultural sources — see References.

Daylily (Hemerocallis fulva)

Daylily (Hemerocallis fulva) naturalized in a mixed garden bed — “'Hemerocallis fulva' Daylily in a flower bed Gibberd Garden Essex England 02” by Acabashi is licensed under CC BY-SA 4.0.

2 sources cited · Verified

Quick Facts

A single daylily bloom showing its six-petaled trumpet shape
A single daylily bloom showing its six-petaled trumpet shape. Photo by Laslovarga, CC BY-SA 4.0.
Factor Value
Drainage Well-drained, fertile (RHS); NC State: well-drained preferred, tolerates poor soil, high organic matter/loam.
Lifecycle Herbaceous, clump-forming perennial. NC State gives USDA zones 3a-8b.
Edible parts flowers, flower_buds, shoots, tubers
Documented problems 2 diseases, 5 pests

At a Glance

A wild-growing daylily flower among tall grass
A wild-growing daylily flower among tall grass. Photo by Cbaile19, CC0.
Hemerocallis fulva Daylily Daylily rust (causal ag… Southern blight Hemerocallis gall midge Aphids Leafminers Snails Slugs DISEASES PESTS

Diseases

A daylily flower with visible yellow throat and stamens
A daylily flower with visible yellow throat and stamens. Photo by Laslovarga, CC BY-SA 4.0.
Daylily rust (causal agent not yet confirmed)
low
Southern blight
moderate

Sclerotium rolfsii

Pests

Side view of a daylily flower on its scape
Side view of a daylily flower on its scape. Photo by Laslovarga, CC BY-SA 4.0.
Hemerocallis gall midge
moderate

Contarinia quinquenotata

Named directly by RHS as causing distorted flowers and unopened buds.

low

Aphididae (various spp.)

RHS: minor damage. NC State does not separately flag aphids.

Leafminers
moderate

Liriomyza spp.

Named specifically by NC State as Daylily Leafminer; RHS does not mention this pest, likely a US-specific pressure.

Snails
low

Gastropoda (snails, various spp.)

RHS: minor damage from snails.

Slugs
low

Gastropoda (slugs, various spp.)

RHS: minor damage from slugs.

Growth Stages

Orange daylily flowers and unopened buds together
Orange daylily flowers and unopened buds together. Photo: “Orange Daylily (Hemerocallis fulva) among Campsis” by Ввласенко, CC BY-SA 3.0.
Stage BBCH Notes
Planting 0 RHS: plant in autumn or spring (summer possible with consistent moisture), crown level with the soil surface, spaced in multiples of three or five for visual impact; also suitable for containers. NC State: division of rhizomes is the propagation method, and clumps spread rapidly once established.
Establishment 3 RHS: little feeding needed, though a general-purpose fertiliser in spring can boost growth, and container plants need regular feeding through the season; avoid heavy shade, which causes straggly growth and poor flowering.
Flowering 6 NC State: flowers June to August. RHS: no staking needed; cut spent flowering stems to the base to encourage more blooms; rich flower colours can bleach in very intense sunlight.
Harvest and autumn tidy 8 RHS: remove old, faded foliage in late autumn or early spring for neatness, though old leaves provide overwintering habitat for beneficial creatures. Divide established clumps every three to four years in spring or autumn to keep them vigorous.

Harvest & Storage

A tawny-orange daylily flower with reflexed petals
A tawny-orange daylily flower with reflexed petals. Photo: “Hemerocallis fulva flower at 六十石山 (2)” by Jason Zhang, CC BY-SA 3.0.

When to pick: NC State: buds and open flowers edible, sweet-spicy or peppery flavour. RHS: only harvest from plants not specifically bred as ornamentals with confirmed edibility -- for unlabelled plants, grow on at least three months and harvest only subsequent flowerings, to reduce pesticide-residue risk. Caution: edibility applies reliably to the original Hemerocallis fulva; ornamental cultivars and hybrids should not be assumed edible.

Storage

Added fresh to stir-fries, salads and soups (RHS); NC State describes the flavour as sweet-spicy or peppery.

Plan your Daylilies planting

When to sow and plant Daylilies depends on your own frost dates. Check the Canada vegetable planting calendar. To work out where it fits in your beds, sketch your plot in the free Garden Layout Planner.

Growing Daylily in another region

Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.

Sources

The full list of 2 sources behind this guide (North Carolina State University Extension (Plant Toolbox), Royal Horticultural Society) is in the references of our UK guide to daylilies; they describe the plant itself, which is the same wherever it grows.

Frequently Asked Questions

What problems affect daylilies?

Our data links 2 diseases and 5 pests to this crop. See the sections above for each one and how to manage it.

Plan next season before the problems start

Short-season growing is arithmetic before it is technique: days to maturity against frost-free days decides what will finish at all. The Canada Garden Planner does that subtraction for your region before you sow.

Get the Canada Garden Planner →

Instant PDF download · Written for Canadian growing conditions

SoilCommander Editorial Team — under the guidance of Nitin Sharma, Co-Founder

Every growing guide is checked against RHS, USDA Cooperative Extension, and other named horticultural authorities before publishing. How we check our facts.

How this guide is put together

The growing data on this page — sowing windows, pests, diseases, soil and site requirements — comes from named horticultural sources, listed in References below, checked against Canadian hardiness-zone and frost-date data, with provincial agriculture and university extension sources cited directly where one exists for a crop. An automated pipeline assembles that verified data into the page you're reading: it selects which facts to lead with and builds the surrounding prose and layout. It does not invent a date, a source or a number — where a verified value for a field isn't available, the page leaves it out rather than guessing. A person reviews and publishes each page; nothing goes live unverified.

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Last verified 2026-09-04

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