How to Grow Monstera Adansonii
Monstera adansonii
Monstera adansonii is a fast-growing trailing or climbing houseplant with distinctive heart-shaped leaves covered in oval holes. It thrives in bright indirect light with high humidity, and benefits from a moss pole or trellis to climb. Keep the soil lightly moist and mist regularly or use a pebble tray to boost humidity. It grows quickly in the right conditions and is an easy choice for shelves, hanging baskets, or a support pole.
Yearly Lifecycle
Care Essentials
Feed monthly with a balanced liquid fertiliser during spring and summer. Reduce to every 6–8 weeks in autumn and stop feeding in winter when growth slows.
Watch For
- Root rot from overwatering (yellowing leaves, mushy roots)
- Mealybug in leaf axils and on stems
- Scale insects (sticky residue, brown bumps)
- Red spider mite in low-humidity conditions
- Yellow leaves from draughts or cold windowsills
Pet Safety
Care Requirements
Light
Bright indirect light; tolerates medium light
Thrives in bright indirect light, such as near a north- or east-facing window. Tolerates medium light but growth slows and fenestrations may be smaller. Avoid direct sun, which scorches the delicate leaves.
Watering
Keep soil lightly moist; allow top 2 cm to dry
Water when the top 2 cm of soil feels dry. Reduce watering in winter when growth slows. Always use a pot with drainage holes to prevent waterlogging.
Fertilizing
Monthly feed in spring and summer
Apply a balanced liquid fertiliser at half strength once a month from spring through summer. Do not feed in autumn or winter.
Pruning
Prune to encourage bushy growth
Trim back long trailing stems to promote branching. Cuttings root readily in water and can be used to propagate new plants.
Humidity
High humidity essential — 50-70% ideal
Mist regularly, use a pebble tray with water, or run a humidifier nearby. Brown leaf tips indicate insufficient humidity, which is common in centrally heated UK homes in winter.
Growing Tips
Provide a moss pole or trellis
Aerial roots need support to climb. Without a pole the plant stays bushy and smaller; with one, leaves grow larger and more fenestrated.
Keep humidity high
Mist daily or place on a pebble tray. Central heating drops humidity well below the 50% minimum, causing brown leaf tips.
Fenestrations come with maturity
Young leaves are often unperforated. Holes develop naturally as the plant matures — no action needed.
Prune to encourage bushy growth
Trim long trailing stems to promote branching. Cuttings root readily in water and can be used to propagate new plants.
Pests & Diseases
Pest Red Spider Mite
Identification: Fine webbing under leaves; pale stippling on leaf surface; tiny red or yellow mites visible under magnification.
- Increase humidity — spider mites thrive in dry air.
- Wipe leaves with a damp cloth; spray with diluted neem oil solution.
- Apply a miticide such as bifenazate when infestation is severe.
Pest Mealybug
Identification: White fluffy cottony masses in leaf axils, on stems, and on undersides of leaves.
- Dab individual mealybugs with a cotton bud dipped in 70% isopropyl alcohol.
- Spray with diluted neem oil or insecticidal soap solution.
- Systemic insecticide containing imidacloprid applied as a soil drench.
Pest Scale Insects
Identification: Brown or tan oval bumps on stems and leaf veins; sticky honeydew on leaves; sooty mould may develop.
- Scrape off scales with a soft toothbrush dipped in soapy water.
- Apply neem oil to all surfaces of the plant.
- Systemic insecticide containing acetamiprid.
Disease Root Rot Pythium spp. / Phytophthora spp.
Symptoms: Yellowing leaves, wilting despite moist soil, brown mushy roots visible when repotting.
Treatment: Remove the plant from its pot, trim off all brown mushy roots with sterile scissors, allow to dry briefly, repot into fresh well-draining mix.
Prevention: Never allow the plant to sit in standing water; use a pot with drainage holes; allow top 2 cm of soil to dry between waterings.
Disease Bacterial Leaf Spot Pseudomonas spp.
Symptoms: Water-soaked dark patches on leaves that enlarge and turn brown or black with a yellow halo.
Treatment: Remove affected leaves immediately; avoid wetting foliage; improve air circulation.
Prevention: Water at the base only; avoid misting directly onto leaves in low-light conditions; keep humidity high but air moving.
