Happy Returns daylily

Sun

Full sun to partial shade; at least 6 hours of direct sun gives the best flowering.

Water

Water regularly while establishing. Established clumps tolerate some drought, but flower better with deep watering during dry spells; avoid waterlogged soil.

Soil

Adaptable to most well-drained soils, including clay improved with organic matter; best in moderately fertile soil that retains some moisture.

Height

1-1.5 ft (0.3-0.45 m), including flower stems

Spread

1-2 ft (0.3-0.6 m)

Flowers

Lemon-yellow, trumpet-shaped flowers from late spring or early summer, with repeat flushes into late summer or early autumn where conditions allow.

Foliage

Narrow, arching green leaves form dense basal fans; foliage normally dies back for winter.

Growth

Moderate; forms a substantial clump over several growing seasons.

Care needed

Low

• Pollinators
• Drought tolerant
• Cold hardy
• Heat tolerant
• Low allergen

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Very tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   1 ft (0.3 m)

2. After 1 year

   1.1 ft (0.32 m)

3. After 2 years

   1.1 ft (0.35 m)

4. After 3 years

   1.2 ft (0.38 m)

   full size

About 3 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Toxic

Growth rate

Moderate

• Plant with the crown about 1 in (2.5 cm) below the soil surface, spacing plants 1.5-2 ft (0.45-0.6 m) apart.
• Water deeply during prolonged dry weather to support repeat flowering.
• Apply compost or a modest dose of balanced fertilizer in spring; avoid heavy nitrogen feeding.
• Mulch with 2 in (5 cm) of organic material, keeping it away from the crown.
• Divide crowded clumps every 3-5 years, or when flowering declines.

Pruning. Remove faded flowers if you want a tidy display, and cut spent flower stems back to the base once their buds are finished. Remove dead leaves in late autumn or early spring; retain healthy green foliage.

Early spring

Remove dead foliage and apply compost or a light balanced feed as growth starts.

Spring

Plant or divide clumps, then water thoroughly until established.

Late spring

Check developing buds for swelling or distortion caused by daylily gall midge; remove affected buds.

Summer

Water during dry spells and remove spent flowers and finished stems.

Early autumn

Divide crowded plants if needed, allowing time for roots to establish before hard frosts.

Late autumn

Clear dead foliage and dispose of any diseased leaves.

• Repeat small groups along the front of a sunny border for a steady rhythm of yellow flowers.
• Edge paths with its low, arching foliage, leaving room so leaves do not cover the walking surface.
• Pair with blue catmint or purple salvias for contrasting flower colours and shapes.
• Plant in drifts with ornamental grasses and coneflowers for a summer perennial display.
• Use in a large, well-drained container where watering can be kept consistent.

Garden styles it suits: Cottage garden, Traditional, New perennial (prairie), Low-maintenance, Small-space and Family-friendly.

Plant it with: Catmint, Perennial salvia, Hardy geranium, Purple coneflower, Siberian iris and Feather reed grass.

Wildlife: Flowers may attract bees and butterflies, though it is not a native host plant in these countries. Deer may eat the buds and flowers.

• Daylily gall midge, particularly in the UK and parts of Europe: swollen, distorted buds fail to open; pick off affected buds promptly and dispose of them in household waste rather than compost.
• Daylily rust, especially in warm, humid regions: orange powdery pustules develop on leaves; remove affected foliage, improve airflow and avoid overhead watering.
• Slugs and snails: young leaves and buds may be chewed; hand-pick at dusk and use labelled iron-phosphate bait if needed.
• Poor repeat flowering: provide more sun, water during drought and divide congested clumps; cool summers can limit rebloom even with good care.

All parts are highly toxic to cats, including flowers, leaves, pollen and water from a vase containing cut stems; ingestion can cause fatal kidney failure and needs immediate veterinary treatment. Daylilies are not known to be toxic to dogs or horses. Some daylily species are eaten by people, but this ornamental cultivar should not be treated as food; eating it may cause stomach upset.

• Stella de Oro daylily (Hemerocallis 'Stella de Oro')

  Has a similar compact habit and repeat flowering, but its flowers are deeper golden yellow rather than the paler lemon yellow of 'Happy Returns'.

• Lemon daylily (Hemerocallis lilioasphodelus)

  Usually has taller flower stems and a more concentrated early-season flowering period, with strongly fragrant, narrower yellow flowers.

• Yellow garden lily (Lilium hybrids)

  True lilies have leafy upright stems growing from bulbs; daylilies have leafless flower stems rising from basal fans of strap-shaped leaves.

Hemerocallis comes from Greek words meaning 'day' and 'beauty', referring to each flower lasting only a day, while 'Happy Returns' refers to its repeat flowering.

Propagation. Divide established clumps in spring or early autumn, keeping several leaf fans and healthy roots on each division. Seed-grown plants will not reliably match 'Happy Returns'.

Accepted botanical name

Hemerocallis

Sources: GBIF (CC BY 4.0). The care and design notes are LandscapeGPT's own.