How-to Guide
Monstera: Care, Watering, and Why Leaves Split
The short answer
Monstera deliciosa does best with an average warm temperature of 60 to 85 F, moderate brightness but not direct sunlight, and high humidity, per NC State Extension. Water it thoroughly, then allow the top quarter to one-third of the soil to dry before watering again.
The signature perforated leaves come with maturity: only mature leaves have the holes, which develop as the leaf grows, so a young plant with solid leaves is normal, not unhealthy. Propagate by stem cuttings or layering, and note that all parts are toxic to people and pets if chewed.
What Monstera Is
Monstera deliciosa, the Swiss cheese plant (often mislabeled split-leaf philodendron), is a climbing tropical aroid with gigantic leaves perforated by holes across the blade. Indoors it appreciates something to climb, like a moss pole, and room to spread.
Light
Moderate brightness without direct sunlight is the target; hot direct sun scorches the leaves. Variegated varieties need more light than the plain dark-green forms to hold their patterning.
Watering
Water thoroughly, then let the top quarter to one-third of the potting mix dry before the next watering. Chronic sogginess yellows lower leaves and rots roots; chronic drought crisps the leaf edges.
✔ Check with a finger: if the top few inches of mix are dry but it is still slightly moist below, you are at the right moment to water.
Soil, Humidity, and Temperature
- Soil: high organic matter with good drainage; a loam-based potting mix at roughly neutral pH (6.0-8.0) works well.
- Temperature: 60 to 85 F average warmth.
- Humidity: high; in dry rooms use a humidifier or a pebble tray under the pot.
Why Your Monstera Has No Holes
Fenestration is an age milestone. NC State notes that only mature leaves develop the perforations, forming as the leaf grows. Good light and steady care get a plant to maturity faster, but no trick forces holes onto juvenile leaves.
Propagation
- 1Stem cutting — Take a cutting that includes at least one node (aerial roots at the node help) and root it in water or moist mix.
- 2Layering — NC State lists layering as the other method: fix a node to moist medium while still attached to the parent, then sever after it roots.
Problems and Pet Safety
- Few pest issues; NC State notes fern scale as the main insect problem.
- Yellow lower leaves plus wet soil: overwatering.
- No leaf splits: immaturity or insufficient light.
⚠ NC State reports monstera contains needle-like calcium oxalate crystals; ingestion causes intense burning of the mouth, tongue, and throat, and all parts are toxic to humans, cats, dogs, and horses. Check the ASPCA plant list and keep leaves away from chewing pets.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- NC State Extension Gardener Plant Toolbox — Monstera deliciosa — 60-85 F, moderate light without direct sun, high humidity; water thoroughly then let top quarter-third dry; layering and stem cutting propagation; holes only on mature leaves; fern scale; calcium oxalate toxicity to humans and pets.