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Plant care

Daylily 'When I Dream' (When I Dream daylily) care

Hemerocallis 'When I Dream'

Also called When I Dream daylily.

RHS H6USDA 3-9Toxic to petsIndoor 60-75 cm tall in bloom

Watering rhythm

7-10days

Every 7-10 days during the growing season, or when the top 5 cm of soil is dry

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Light

Direct sun (at least 4-6 hours)

Soil

Fertile, well-draining loam or amended garden soil

Humidity

40-70%

Temp

5-35°C

Pet safety

Toxic to pets

Mature size

60-75 cm tall in bloom

Care at a glance

Light

Aim for at least 4-6 hours of direct sun on the leaves. Full sun of at least 6 hours daily is ideal for maximum bloom production and the fullest petal colouring. A position with morning sun and light afternoon shade suits hotter gardens in the south of the US. If your only bright window faces south, that's perfect for daylily 'when i dream' — same window any aroid would fry on.

Watering

Watering daylily 'when i dream': every 7-10 days during the growing season, or when the top 5 cm of soil is dry. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Keep soil consistently moist during the bud and bloom stages for best results. Drought-tolerant once established, though extended dry spells reduce flower count and size.

Soil and pot

Daylily 'When I Dream' grows best in fertile, well-draining loam or amended garden soil. Prefers slightly acidic to neutral, humus-rich soil. Incorporate organic matter before planting and mulch heavily to maintain even root-zone moisture. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Daylily 'When I Dream' sits happiest at around 40-70% humidity and 5-35°C (40-95°F). Performs well across typical temperate outdoor humidity ranges. Ensure adequate spacing for airflow to limit fungal foliage diseases. If you keep the room above 5 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed daylily 'when i dream' sparingly. Apply a balanced granular fertiliser in early spring as foliage emerges. A potassium-rich liquid feed at the time of bud set can improve flower size and the depth of the eye-zone colour. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on daylily 'when i dream' in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Daylily rust — Characteristic orange spore pustules on leaves; remove and dispose of infected material promptly, then apply a fungicide if needed.
  • Aphids — Colonise buds and tender growth in spring; insecticidal soap or a blast of water usually resolves minor infestations.
  • Thrips — Cause silvery petal streaking; neem oil or spinosad sprays applied in the early morning are most effective.
  • Slug damage — Spring foliage is vulnerable; use iron phosphate pellets around emerging crowns as a preventive measure.
  • Poor rebloom — Ensure adequate feeding and watering after the first flush; deadhead spent scapes to encourage a second flowering flush.

Companion plants

Daylily 'When I Dream' pairs well with Rosa (shrub roses), Alchemilla mollis, Geranium 'Rozanne', and Salvia nemorosa. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Divide clumps in early spring or late summer every 3-5 years; each division should contain several fans and a healthy root section. Named cultivars must be divided rather than grown from seed. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Daylily 'When I Dream' is toxic to pets. Hemerocallis (daylilies) are listed by the ASPCA as toxic to cats; ingestion of any part — including pollen and cut-flower water — can cause acute kidney failure and is potentially fatal. Also mildly toxic to dogs and horses. All daylily cultivars should be kept away from cats. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Daylily 'When I Dream' care — frequently asked questions

What is the common name for Hemerocallis 'When I Dream'?

Hemerocallis 'When I Dream' is most commonly called Daylily 'When I Dream', but it is also known as When I Dream daylily. The names refer to the same species, so care instructions for Daylily 'When I Dream' apply identically to anything sold as When I Dream daylily.

How much light does daylily 'when i dream' need?

Daylily 'When I Dream' grows best in direct sun (at least 4-6 hours). Full sun of at least 6 hours daily is ideal for maximum bloom production and the fullest petal colouring. A position with morning sun and light afternoon shade suits hotter gardens in the south of the US.

How often should I water daylily 'when i dream'?

Water daylily 'when i dream' every 7-10 days during the growing season, or when the top 5 cm of soil is dry. Keep soil consistently moist during the bud and bloom stages for best results. Drought-tolerant once established, though extended dry spells reduce flower count and size. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is daylily 'when i dream' toxic to cats and dogs?

Daylily 'When I Dream' is toxic to pets. Hemerocallis (daylilies) are listed by the ASPCA as toxic to cats; ingestion of any part — including pollen and cut-flower water — can cause acute kidney failure and is potentially fatal. Also mildly toxic to dogs and horses. All daylily cultivars should be kept away from cats.

What USDA hardiness zone does daylily 'when i dream' grow in?

Daylily 'When I Dream' is rated for USDA zone 3-9 and RHS hardiness H6. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Daylily 'When I Dream' deep-dive guides

Every aspect of daylily 'when i dream' care, each with its own calibrated guide:

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Daylily 'When I Dream' qualifies for 5 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

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Daylily 'When I Dream' is also commonly called When I Dream daylily.