Growli

Plant care

Weeping Blue Atlas Cedar care

Cedrus atlantica 'Glauca Pendula'

Also called weeping blue Atlas cedar.

RHS H6USDA 6-9Mildly toxic to petsIndoor Highly variable with training — typically 3-5 m tall and 3-6 m wide

Watering rhythm

1-2weeks

Every 1-2 weeks while young, then only in drought

Light

Direct sun (at least 4-6 hours)

Soil

Well-drained loam; tolerates sandy and chalky soils

Humidity

Outdoor ambient

Temp

-20 to 32°C

Pet safety

Mildly toxic to pets

Mature size

Highly variable with training — typically 3-5 m tall and 3-6 m wide

Care at a glance

Light

Aim for at least 4-6 hours of direct sun on the leaves. Full sun keeps the needles brightest blue and growth dense; shade dulls colour and weakens the weeping form. If your only bright window faces south, that's perfect for weeping blue atlas cedar — same window any aroid would fry on.

Watering

Watering weeping blue atlas cedar: every 1-2 weeks while young, then only in drought. 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. Water regularly for the first two to three years to establish. Mature plants tolerate dry spells and dislike standing water around the roots.

Soil and pot

Weeping Blue Atlas Cedar grows best in well-drained loam; tolerates sandy and chalky soils. Wants a free-draining, slightly acidic to neutral site. Heavy wet clay leads to root problems; improve drainage before planting. 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

Weeping Blue Atlas Cedar sits happiest at around Outdoor ambient humidity and -20 to 32°C (-4 to 90°F). A garden specimen with no specific humidity needs; thrives in dry, sunny conditions like its Atlas Mountains parent. If you keep the room above 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 weeping blue atlas cedar sparingly. Light needs; a spring feed of slow-release conifer fertiliser helps young plants build framework. Avoid heavy feeding, which forces soft growth. 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 weeping blue atlas cedar in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Loss of shape without trainingNeeds a staked leader and periodic tying-in early on; left unstaked it sprawls into a low mound rather than a weeping tree.
  • Faded colour in shadeBlue needles dull without full sun; site in an open, bright position.
  • Root rot on wet groundWaterlogging causes yellowing and dieback; plant only in sharply drained soil.
  • Branch breakageLong pendulous limbs can snap under snow or their own weight; remove snow load and support heavy branches.

Propagation

Propagated by grafting the pendulous selection onto Cedrus atlantica seedling rootstock; it does not come true from seed and weeping form must be maintained by training. 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

Weeping Blue Atlas Cedar is mildly toxic to pets. Cedrus atlantica is not individually listed on the ASPCA toxic or non-toxic plant lists; treat with caution and verify with a vet. Needles and cones may cause mild gastrointestinal upset such as vomiting or diarrhoea in cats and dogs if eaten, and the aromatic oils can irritate skin. 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.

Weeping Blue Atlas Cedar care — frequently asked questions

What is Weeping Blue Atlas Cedar?

Weeping Blue Atlas Cedar (Cedrus atlantica 'Glauca Pendula') is a flowering plant with a strongly weeping evergreen; staked into an upright leader then allowed to cascade, so habit is highly variable and architectural. growth habit, reaching highly variable with training — typically 3-5 m tall and 3-6 m wide, but can be kept smaller or trained to sprawl. at maturity. Weeping blue Atlas cedar is a sculptural evergreen with cascading, blue-needled branches that drape downward from whatever framework it's trained on. Every tree is unique, shaped by staking.

How much light does weeping blue atlas cedar need?

Weeping Blue Atlas Cedar grows best in direct sun (at least 4-6 hours). Full sun keeps the needles brightest blue and growth dense; shade dulls colour and weakens the weeping form.

How often should I water weeping blue atlas cedar?

Water weeping blue atlas cedar every 1-2 weeks while young, then only in drought. Water regularly for the first two to three years to establish. Mature plants tolerate dry spells and dislike standing water around the roots. 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 weeping blue atlas cedar toxic to cats and dogs?

Weeping Blue Atlas Cedar is mildly toxic to pets. Cedrus atlantica is not individually listed on the ASPCA toxic or non-toxic plant lists; treat with caution and verify with a vet. Needles and cones may cause mild gastrointestinal upset such as vomiting or diarrhoea in cats and dogs if eaten, and the aromatic oils can irritate skin.

What USDA hardiness zone does weeping blue atlas cedar grow in?

Weeping Blue Atlas Cedar is rated for USDA zone 6-9 and RHS hardiness H6. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Weeping Blue Atlas Cedar deep-dive guides

Every aspect of weeping blue atlas cedar care, each with its own calibrated guide:

Featured in these plant shortlists

Weeping Blue Atlas Cedar qualifies for 5 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Weeping Blue Atlas Cedar is also commonly called weeping blue Atlas cedar.