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Plant care

Flat-Leaved Crassula (Burgundy Crassula) care

Crassula platyphylla

Also called Burgundy Crassula, Flattened Jade, Red Pancake Crassula.

RHS H2USDA 9-11Toxic to petsIndoor 5-15 cm tall

Watering rhythm

10-14days

When the top 3-5 cm of soil is dry, approximately every 10-14 days in summer

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Light

Bright indirect light (just back from a sunny window)

Soil

Gritty, well-draining succulent mix

Humidity

30-50%

Temp

10-27°C

Pet safety

Toxic to pets

Mature size

5-15 cm tall

Care at a glance

Light

In the wild flat-leaved crassula grows on the bright edge of a forest canopy, not in the canopy and not in the open. Indoors, that translates to within a metre of an unobstructed window, sheer curtain optional. Bright indirect to some direct light is ideal. Direct morning or afternoon sun intensifies the burgundy colouration. In low light, leaves remain green and the plant may become leggy. The fastest test: a hand held at the leaf casts a soft-edged shadow at noon — sharp shadow means too much sun, no shadow means too little light.

Watering

Aim for when the top 3-5 cm of soil is dry, approximately every 10-14 days in summer for flat-leaved crassula, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Water thoroughly then allow to dry down before watering again. Reduce to every 3-4 weeks in winter. Avoid overwatering, which is the primary cause of plant loss.

Soil and pot

Flat-Leaved Crassula grows best in gritty, well-draining succulent mix. Use a proprietary succulent compost or blend standard potting mix with 40% perlite. Excellent drainage is essential to prevent crown rot at the stem base. 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

Flat-Leaved Crassula sits happiest at around 30-50% humidity and 10-27°C (50-80°F). Tolerates dry indoor air well. No need for misting. Average household humidity is fine year-round. If you keep the room above 10 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 flat-leaved crassula sparingly. Apply a low-nitrogen succulent fertiliser at half-strength once a month from spring through to late summer. Withhold feeding entirely in autumn and winter. 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 flat-leaved crassula in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Root rot — Soggy soil quickly rots the shallow root system. Ensure the container has drainage holes and allow the soil to dry fully between waterings.
  • Loss of red colour — Leaves revert to green in low light. Move to a brighter spot with some direct sun to restore the burgundy pigmentation.
  • Mealybugs — Cluster in leaf axils. Remove with isopropyl alcohol and monitor regularly.
  • Sunburn — Pale, papery patches appear if moved directly into hot midday sun. Acclimatise the plant gradually.
  • Stretching — Stems elongate and leaves space out in low light. Prune back lightly to tidy the plant and improve light levels.

Companion plants

Flat-Leaved Crassula pairs well with Echeveria agavoides, Sedum rubrotinctum, Graptopetalum paraguayense, and Aeonium haworthii. 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

Propagate from leaf cuttings or stem tip cuttings taken in spring or summer. Allow cut surfaces to callous for 1-2 days before placing on top of dry succulent compost. New roots and rosettes develop within 3-6 weeks. 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

Flat-Leaved Crassula is toxic to pets. The ASPCA lists Crassula species as toxic to cats and dogs, causing vomiting, depression, and incoordination. Crassula platyphylla should be treated as mildly toxic and kept out of reach of pets. 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.

Flat-Leaved Crassula care — frequently asked questions

What is the common name for Crassula platyphylla?

Crassula platyphylla is most commonly called Flat-Leaved Crassula, but it is also known as Burgundy Crassula, Flattened Jade, Red Pancake Crassula. The names refer to the same species, so care instructions for Flat-Leaved Crassula apply identically to anything sold as Burgundy Crassula.

How much light does flat-leaved crassula need?

Flat-Leaved Crassula grows best in bright indirect light (just back from a sunny window). Bright indirect to some direct light is ideal. Direct morning or afternoon sun intensifies the burgundy colouration. In low light, leaves remain green and the plant may become leggy.

How often should I water flat-leaved crassula?

Water flat-leaved crassula when the top 3-5 cm of soil is dry, approximately every 10-14 days in summer. Water thoroughly then allow to dry down before watering again. Reduce to every 3-4 weeks in winter. Avoid overwatering, which is the primary cause of plant loss. 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 flat-leaved crassula toxic to cats and dogs?

Flat-Leaved Crassula is toxic to pets. The ASPCA lists Crassula species as toxic to cats and dogs, causing vomiting, depression, and incoordination. Crassula platyphylla should be treated as mildly toxic and kept out of reach of pets.

What USDA hardiness zone does flat-leaved crassula grow in?

Flat-Leaved Crassula is rated for USDA zone 9-11 and RHS hardiness H2. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Flat-Leaved Crassula deep-dive guides

Every aspect of flat-leaved crassula care, each with its own calibrated guide:

Featured in these plant shortlists

Flat-Leaved Crassula qualifies for 6 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Flat-Leaved Crassula is also known as Burgundy Crassula, Flattened Jade, and Red Pancake Crassula.