Monstera Adansonii Care: Train It to Climb for Bigger Fenestrations — and Why Trailing Vines Stay Small
Most adansonii owners trail theirs and wonder why the holes stay small. Here’s the care guide and climbing technique for bigger, fenestrated leaves.
Your monstera adansonii can grow two ways — and one of them keeps every leaf under 4 inches with barely-there holes. Trail it from a shelf, and it does exactly what the plant is wired to avoid in nature. Give it something to climb, and it responds by pushing leaves twice the size with the dramatic fenestrations that make adansonii worth owning.
This guide covers complete adansonii care — light, water, soil, humidity, fertilizer — alongside a practical section on training your plant to climb, a seasonal care calendar, and a diagnostic table for common problems. For how adansonii compares to deliciosa, Thai Constellation, and other monstera relatives, see our monstera growing guide.
Trail vs. Climb: The Growth Mode That Controls Your Fenestrations
Monstera adansonii is a secondary hemi-epiphyte. In the rainforests of Central and South America, juvenile plants grow toward the base of trees through negative phototropism — the plant steers away from light to find a vertical surface [6]. Once it locates a trunk, it attaches aerial roots and ascends. As it climbs toward the canopy and intercepts more light, it responds by producing larger and larger leaves with increasingly pronounced fenestrations.
In your home, a trailing adansonii is running the juvenile program. It isn’t climbing toward a light source, and the plant isn’t triggering the hormonal response that produces mature leaf development. The Royal Horticultural Society confirms that training monstera onto a moss pole “encourages larger, more mature leaves with increased fenestration” [2]. The mechanism: attached aerial roots sense a stable surface, the plant commits to upward growth, and leaf blade expansion follows as the vine moves closer to the light source.
If your adansonii’s leaves are consistently under 3 inches and the holes are barely visible, check growth mode before blaming light or watering. A moss pole combined with bright indirect light is the fix — exactly how to set one up is covered in the climbing section below.
Light: The Fenestration Trigger
Bright indirect light is the baseline requirement, and the distinction matters. An east-facing window delivers gentle morning sun followed by bright shade — the closest indoor approximation to the dappled understory light this plant evolved in. A west window works but runs hotter in the afternoon; pull the plant 3–4 feet back or add a sheer curtain if pale or bleached patches develop.
The connection between light intensity and fenestration development is well established. The RHS notes that “low light conditions result in fewer holes developing on the foliage” [2], and the underlying biology was formalized in a 2013 peer-reviewed study by Christopher Muir of Indiana University. Published in The American Naturalist, Muir’s growth-variance hypothesis proposes that fenestrated leaves reduce variance in light capture under the dappled sunfleck conditions of the rainforest understory — the holes let sunfleck pulses pass through to lower leaves while the remaining leaf surface still intercepts any fleck that hits it, increasing geometric mean fitness across the whole plant [1]. In low light, that optimization is never triggered, and fenestrations don’t develop.
In practice: a north window produces leggy growth with small, minimally perforated leaves. If that’s your only option, a grow light positioned 12–18 inches overhead on a 12–14 hour daily timer will compensate. At the other extreme, avoid unfiltered south-facing glass — the UF/IFAS Extension confirms that “intense sun exposure may cause leaf scorching” [4].
Watering: Overwatering Kills More Adansonii Than Underwatering
The rule that works across every season: water when the top 1–2 inches of soil are dry, then water thoroughly until it runs freely from the drainage holes. Between waterings, adansonii roots need oxygen in the soil. When soil stays saturated, root cells are deprived of oxygen — a condition called hypoxia — and begin to decay. Once root rot sets in, the plant can no longer uptake water, and leaves droop and yellow despite the soil being wet. Recovery requires unpotting, cutting away black or mushy roots, and repotting into fresh dry mix.
The RHS recommends allowing the compost to become “almost dry before thoroughly watering” and emphasizes never leaving the pot sitting in water [2]. Adansonii roots are more sensitive to retained moisture than deliciosa — the vining, climbing roots in nature drain rapidly from bark and crevices, and the soil equivalent is a mix that dries reasonably quickly between waterings.
In winter, reduce watering frequency by roughly half. The plant slows growth significantly and roots take up far less water. A schedule that works in July will cause root rot by January if left unchanged.
Water quality: In hard water areas, calcium and fluoride accumulation causes brown leaf tip burn. Switching to filtered water or rainwater typically resolves this within a few weeks.
Soil: Fast Drainage Is Non-Negotiable
Standard potting soil alone holds too much moisture for adansonii. A reliable blend: 2 parts standard potting mix to 1 part perlite, or swap the perlite for coarse orchid bark for even faster drainage. The RHS recommends one part ericaceous peat-free compost to two parts orchid compost, with a target pH of 5–6 [2]. Both approaches produce the same outcome — a mix that holds enough moisture for roots to hydrate but drains quickly enough that soil never stays waterlogged.
A quick field test: water the pot and observe how fast water exits the drainage hole. If water pools at the surface for more than 10 seconds, the mix is too dense. Repot into a coarser blend.
Choose a pot with at least one drainage hole. Terra cotta dries faster than plastic or glazed ceramic — useful if you tend to overwater. Never add a layer of gravel to the bottom of a pot without drainage holes; this creates a perched water table that makes root rot worse.
Humidity and Temperature
Adansonii performs best at 50–60% relative humidity. Average household humidity (40–50%) is workable but the plant will be slower and more prone to crispy margins at the lower end. Effective methods: a small ultrasonic humidifier near the plant, a pebble tray with water beneath the pot (pot sits on pebbles, not in the water), or grouping tropical plants to benefit from shared transpiration.
Misting leaves directly offers minimal lasting benefit — water evaporates within minutes. Misting the moss pole, however, serves a different function: it keeps the pole moist enough to encourage aerial roots to attach and grow into it. More on this in the climbing section.
The ideal temperature range is 65–85°F (18–30°C). Keep the plant away from cold drafts near windows and exterior doors in winter. The UF/IFAS Extension notes that temperatures below 55°F are the plant’s limit [6]. Cold window glass can chill leaves even when the room itself is warm — in USDA zones 6 and below, move plants at least 6 inches away from the glass from October through March.
Fertilizing
Feed during the active growing season — April through September in most US climates. A balanced liquid fertilizer applied monthly at half strength covers the plant’s needs. The RHS recommends a balanced liquid fertilizer during the growing season [2].
For more precise results, choose a urea-free complete fertilizer. Urea-based nitrogen must first be converted by soil bacteria before roots can absorb it, and that conversion is slower in fast-draining mixes with reduced microbial populations. A urea-free formula delivers nitrogen in a form roots can use immediately, without the conversion step [5].
Stop fertilizing from October through March. In slow growth mode, the plant can’t use the nutrients. Unused fertilizer salts build up in the soil over time, causing root burn and brown-tipped leaves that owners often mistake for a humidity problem.
Training Your Adansonii to Climb
Setting up a moss pole takes about 10 minutes. The aerial roots emerging from the stem nodes need a moist surface to anchor to — sphagnum moss provides this. Once roots attach and grow into the pole, the plant begins pushing larger leaves with each new node.
Step 1: Select a pole. For adansonii, a 24–36 inch sphagnum moss pole is sufficient to start. Coco coir poles are an alternative — they dry out faster than sphagnum, which suits humid rooms but may need more frequent misting in drier environments. Either works; the key is keeping the pole moist.
Step 2: Insert and position. Push the stake into the center of the pot, all the way to the bottom for stability. Position it close to the plant’s main stem.
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→ View My Garden CalendarStep 3: Attach the vine. Use soft plant ties or strips of cut pantyhose to gently secure the main stem to the pole at 3–4 inch intervals. The goal is contact between aerial roots and the moss surface — guide, don’t bind.
Step 4: Mist the pole daily. This is the step most care guides omit. Aerial roots only grow into the pole if it stays consistently moist. Dry moss repels root attachment. Once roots have grown 1–2 inches into the pole, the plant is anchored and will continue growing upward without further tying.
The first set of new leaves after the plant commits to climbing will already be noticeably larger than the trailing leaves that preceded them. As the vine ascends and moves closer to the light source, each successive leaf tends to be larger than the last.
To see how adansonii’s fenestrations compare to the larger holes and splits of deliciosa and other relatives, visit our guide to monstera types and varieties.
Propagation
Monstera adansonii is among the easiest houseplants to propagate. The only non-negotiable: every cutting must include at least one node.
A node is the bump or joint on the stem where a leaf petiole attaches. Roots emerge from nodes — not from the internodal stem, and not from leaves alone. A leaf cutting with no node will sit in water indefinitely without rooting [6].
Water propagation (recommended for beginners):
- Cut just below a node using clean, sharp scissors. Aim for a cutting with 1–2 nodes and at least one leaf. A visible aerial root at the node accelerates rooting.
- Remove any leaves that would fall below the waterline.
- Place in a clear jar of room-temperature water with the node submerged and leaves above water. Position in bright indirect light.
- Change the water weekly to prevent bacterial buildup.
- Expect the first root tips in 2–4 weeks. Pot into soil once roots reach about 1 inch in length [5].
Spring and early summer produce the fastest results — longer days and warmer temperatures accelerate rooting. Cuttings taken in October or November may take 6–8 weeks or longer.
Seasonal Care Calendar
| Month | Task |
|---|---|
| March | Resume monthly fertilizing. Check for rootbound conditions — roots escaping drainage holes or circling at the soil surface mean it’s time to repot. |
| April–May | Fastest growth period. Water more frequently as temperatures rise. Ideal window to set up or upgrade a moss pole. Best time to take propagation cuttings. |
| June–August | Peak growing season. Monitor watering closely — soil dries faster in summer heat. Continue monthly feeding. Watch for spider mites, which favor hot, dry conditions. |
| September | Last fertilizer application of the year. Growth begins to slow. |
| October | Reduce watering frequency. Move plants away from cold window glass in northern climates (USDA zones 6 and below). Stop fertilizing. |
| November–February | Minimal care period. Water only when the top 2 inches are dry — often every 2–3 weeks. Maintain temperatures above 55°F. No fertilizer. |
Common Problems
| Symptom | Likely Cause | Fix |
|---|---|---|
| Yellow leaves, lower leaves first | Overwatering or soil staying wet too long | Allow top 2 inches to dry fully before watering; verify drainage holes are unblocked |
| Brown, crispy leaf edges | Low humidity or fluoride and salt buildup | Boost humidity to 50%+; switch to filtered or rainwater; flush soil thoroughly to leach accumulated salts |
| Leaves with no holes or tiny holes | Trailing growth mode, insufficient light, or plant under 2 years old | Install a moss pole and train to climb; move to brighter indirect light |
| Long, leggy stems with small leaves | Insufficient light | Move to an east or west-facing window; add a grow light 12–18 inches above the canopy |
| Drooping despite moist soil | Root rot — roots can no longer uptake water even though soil is wet | Unpot and inspect roots; trim all black or mushy sections; repot in fresh dry chunky mix; withhold water for 7–10 days |
| White cottony residue on stems and leaf joints | Mealybugs | Remove with isopropyl alcohol on a cotton swab; treat with neem oil spray weekly for 4 consecutive weeks |
| Mottled, distorted, or mosaic-patterned new leaves | Mosaic virus | No cure exists; isolate the plant immediately to prevent spread; contact your local university extension office for confirmation [5] |
Toxicity: Keep Out of Reach of Pets and Children
All monstera species contain insoluble calcium oxalate crystals throughout their tissues. The ASPCA classifies monstera as toxic to both dogs and cats [3]. Ingestion causes oral irritation, intense burning of the mouth, tongue, and lips, excessive drooling, vomiting, and difficulty swallowing. The UF/IFAS Extension additionally notes that all plant parts contain high levels of oxalic acid [4].
Adansonii’s smaller leaf size and compact growth make it easier to position out of reach than deliciosa — a hanging basket or high shelf typically solves the problem. If you suspect your pet has ingested any part of the plant, contact the ASPCA Animal Poison Control Center at (888) 426-4435 or your veterinarian immediately.
Frequently Asked Questions
Why doesn’t my adansonii have holes?
The two most common causes are growth mode and light level — and both are fixable. If the plant is trailing, add a moss pole. If it’s in a dim location, move it to a brighter one. Adansonii under 2–3 years old also produce fewer fenestrations regardless of conditions; juvenile leaves often lack holes entirely, which is normal.
How fast does monstera adansonii grow?
Under good conditions — bright indirect light, regular watering, monthly fertilizing, and a pole to climb — adansonii is a genuinely fast grower. In summer, a healthy climbing specimen can push a new leaf every 1–2 weeks. In winter, expect one leaf per month or slower.
Can I keep adansonii in a hanging basket?
Yes, but expect smaller leaves and fewer fenestrations than a climbing plant produces. A hanging basket is a trailing setup — the plant won’t engage the growth mode that drives larger, more mature leaves. If the trailing aesthetic is the goal, that’s a perfectly valid choice.
How large do adansonii leaves get?
On a mature climbing specimen with good light, leaves typically reach 5–8 inches across. Trailing specimens in average indoor light commonly stay at 2–4 inches per leaf. The difference is primarily growth mode and secondarily light level.
When should I repot?
When roots escape the drainage holes or begin circling the soil surface, move up one pot size — 2 inches wider in diameter. Avoid jumping to a much larger pot; excess soil volume holds moisture the roots can’t use, increasing root rot risk. Spring is the best repotting window.
Sources
[1] Muir, C.D. (2013). “How Did the Swiss Cheese Plant Get Its Holes?” The American Naturalist, 181(2), 273–281. DOI: 10.1086/668819 — PubMed
[2] Royal Horticultural Society. “How to Grow Swiss Cheese Plants.” RHS Growing Guide.
[3] ASPCA. “Swiss Cheese Plant (Monstera).” ASPCA Poison Control Center.
[4] UF/IFAS Extension. “Monstera Growing in the Florida Home Landscape (HS311).” University of Florida IFAS Extension.
[5] Crocker, E. “How to Grow Monstera adansonii: 7 Vital Growing Tips.” Ohio Tropics.
[6] UF/IFAS Extension Charlotte County. “Holey Leaves — When Holes in Leaves Are a Good Thing.”
