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Plant care

Monstera Deliciosa Ronronensis (Ronronensis monstera) care

Monstera deliciosa var. sierrana

Also called Ronronensis monstera, Sierra monstera.

RHS H1bUSDA 10-12Toxic to petsIndoor Indoors 1.5-2.5 m tall on support

Watering rhythm

7-10days

When the top 5 cm of soil is dry, roughly every 7-10 days

Light

Bright indirect light (just back from a sunny window)

Soil

Chunky, fast-draining aroid mix

Humidity

60-80%

Temp

18-29°C

Pet safety

Toxic to pets

Mature size

Indoors 1.5-2.5 m tall on support

Care at a glance

Light

Monstera Deliciosa Ronronensis is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Bright, filtered light close to an east or south window drives faster fenestration. Direct midday sun scorches; deep shade leaves stay small and entire. Early-morning or late-evening sun is tolerated. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water monstera deliciosa ronronensis when the top 5 cm of soil is dry, roughly every 7-10 days. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Water thoroughly until it drains, then let the top few inches dry before the next soak. It tolerates brief dryness but resents soggy soil, the main cause of root rot. Reduce frequency in winter.

Soil and pot

Monstera Deliciosa Ronronensis grows best in chunky, fast-draining aroid mix. Blend orchid bark, perlite or pumice, coco coir and a little worm castings for aeration and moisture retention. Mimics epiphytic forest-floor conditions and keeps roots oxygenated. Aim for slightly acidic, free-draining medium. 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

Monstera Deliciosa Ronronensis sits happiest at around 60-80% humidity and 18-29°C (65-85°F). Thrives in high humidity, which speeds leaf maturation and prevents crispy edges. Tolerates 50% indoors but fenestration and growth slow in dry air. A humidifier or pebble tray helps in winter. If you keep the room above 18 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 monstera deliciosa ronronensis sparingly. Feed monthly through spring and summer with a balanced liquid fertiliser diluted to half strength; pause in autumn and winter. Flush the pot occasionally to prevent salt build-up that browns leaf tips. 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 monstera deliciosa ronronensis in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Leaves stay entire (no splits)Immature plants and those in low light or without a climbing support produce solid, unfenestrated leaves. Increase light and add a moss pole to trigger mature, split foliage.
  • Yellowing leavesUsually overwatering and soggy roots; check that the top few inches dry between waterings and that the pot drains freely. Old lower leaves yellowing one at a time is normal.
  • Brown, crispy leaf edgesLow humidity or fertiliser-salt build-up. Raise humidity above 50% and flush the soil periodically to leach excess salts.
  • Root rotCaused by dense, water-retentive soil or chronic overwatering. Repot into a chunky aroid mix, trim mushy roots and let the medium dry adequately between drinks.

Propagation

Propagate by stem cuttings with at least one node and ideally an aerial root; root in water, sphagnum moss or straight into airy aroid mix. Air-layering on a node before cutting raises success on this slower-growing variety. 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

Monstera Deliciosa Ronronensis is toxic to pets. ASPCA lists Monstera deliciosa as toxic to cats and dogs. The toxic principle is insoluble calcium oxalate crystals; chewing causes oral irritation, intense burning of mouth and lips, drooling, vomiting and difficulty swallowing. Keep away from pets and children. 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.

Monstera Deliciosa Ronronensis care — frequently asked questions

What is the common name for Monstera deliciosa var. sierrana?

Monstera deliciosa var. sierrana is most commonly called Monstera Deliciosa Ronronensis, but it is also known as Ronronensis monstera, Sierra monstera. The names refer to the same species, so care instructions for Monstera Deliciosa Ronronensis apply identically to anything sold as Ronronensis monstera.

How much light does monstera deliciosa ronronensis need?

Monstera Deliciosa Ronronensis grows best in bright indirect light (just back from a sunny window). Bright, filtered light close to an east or south window drives faster fenestration. Direct midday sun scorches; deep shade leaves stay small and entire. Early-morning or late-evening sun is tolerated.

How often should I water monstera deliciosa ronronensis?

Water monstera deliciosa ronronensis when the top 5 cm of soil is dry, roughly every 7-10 days. Water thoroughly until it drains, then let the top few inches dry before the next soak. It tolerates brief dryness but resents soggy soil, the main cause of root rot. Reduce frequency in winter. 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 monstera deliciosa ronronensis toxic to cats and dogs?

Monstera Deliciosa Ronronensis is toxic to pets. ASPCA lists Monstera deliciosa as toxic to cats and dogs. The toxic principle is insoluble calcium oxalate crystals; chewing causes oral irritation, intense burning of mouth and lips, drooling, vomiting and difficulty swallowing. Keep away from pets and children.

What USDA hardiness zone does monstera deliciosa ronronensis grow in?

Monstera Deliciosa Ronronensis is rated for USDA zone 10-12 (indoor in most US homes) and RHS hardiness H1b. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Monstera Deliciosa Ronronensis deep-dive guides

Every aspect of monstera deliciosa ronronensis care, each with its own calibrated guide:

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Monstera Deliciosa Ronronensis 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

Monstera Deliciosa Ronronensis is also commonly called Ronronensis monstera or Sierra monstera.