Monstera Aerial Roots: Cut or Keep Decision Tree

What Aerial Roots Actually Do

Aerial roots are roots that grow above the soil rather than below it. In Monstera deliciosa, they emerge from nodes along the stem and serve three functions in the plant's native habitat: they climb tree trunks, they anchor the plant against wind and gravity, and they absorb atmospheric humidity directly through specialised cells.

In a Bolivian or Costa Rican rainforest, a mature Monstera scales 20-30 metres up a tree using these roots as both grippers and supplementary water uptake. In a Sydney apartment, they do less — the plant is upright in a pot, not climbing — but they still try.

The misconception is that aerial roots indicate something wrong. They don't. A Monstera that produces aerial roots is mature enough and healthy enough to support that growth pattern. A Monstera with no aerial roots after several years is more often the worry — usually low light, undersized pot, or insufficient maturity.

The 4-Question Decision Tree

Most Monsteras land at Q4 with a green answer. The default is leave them.

When to Cut (3 Valid Cases + 2 Invalid Panics)

Valid case 1: Safety. An aerial root growing toward a power outlet, behind a heavy bookshelf where it could lift the shelf, or into a window seal where it could damage the seal — cut it. The plant won't notice losing one root. Use clean scissors or pruners, cut at a slight angle about 1 cm out from the stem. The wound seals within a few days.

Valid case 2: Top-heaviness. Sometimes a maturing Monstera leans because the leaves grew faster than the stem could support, but the existing aerial roots aren't grabbing anything to anchor it. Cutting them off doesn't fix the lean — you'd then need to stake the plant anyway. The better move is to redirect those aerial roots into a moss pole and let them grip the pole. If the plant has flopped already and the roots are too short to redirect, cut the leaning stem above a node and propagate the top half. Both halves recover in 4-6 weeks.

Valid case 3: Propagation. When you take a node cutting for a new plant, including a node with at least one aerial root attached cuts the rooting time roughly in half. The aerial root immediately starts converting to a soil-feeder root once it's submerged in water or soil. Cuttings without aerial roots take 4-8 weeks to root; cuttings with one aerial root root in 2-4 weeks. The propagation success rate is also higher — around 85% in water with an aerial root, versus 65-70% without one.

Invalid panic 1: "It looks weird." Aerial roots can look surprising on a houseplant if you've never seen one before. They can be fat, knobbly, sometimes bright green tips on darker brown stems. They look unlike soil roots. They are supposed to look like that. Cutting for cosmetic reasons removes a functional plant part.

Invalid panic 2: "They might damage furniture." Aerial roots are slow growers, around 3-5 cm per month in good conditions. They don't grip wood or paint the way ivy does — they need a porous surface or substrate. A cabinet or desk near the plant is fine. The exception is if the root finds a crack or seam and enters; redirect or cut once.

How to Redirect into a Moss Pole

If your Monstera is producing aerial roots and you have or can add a moss pole, redirecting is almost always better than cutting. The plant gains support, growth rate increases, and you don't lose any plant tissue.

1. Wet the moss pole. A dry pole won't grip aerial roots and the roots won't penetrate. Soak it for 5-10 minutes before use. Keep it damp going forward; mist it every 2-3 days.
2. Position the pole in the pot. Sink it 5-10 cm into the soil, behind the main stem if possible. Some people drive the pole down to the bottom of the pot for stability.
3. Gently bend each aerial root toward the pole. Don't force it. Use soft plant ties or even a strip of plant-safe pantyhose to hold the root against the moss for the first 4-6 weeks while the root attaches itself.
4. Check weekly. The root will start sending small lateral hairs into the moss within 2-4 weeks. Once that happens, you can remove the tie. The plant grips on its own from there.

A standard moss pole, around $20-40 AUD at most plant shops, lasts 1-2 years before the moss starts breaking down. Coir poles last longer (3-5 years) but are stiffer and grip slightly less aggressively. Either works.

Direct soil training is also viable. If an aerial root is pointing downward and is long enough to reach the soil surface, gently guide it in and bury the tip 2-3 cm. The root converts to a soil-feeder within a few weeks and the plant's overall growth rate often doubles. This is the cheapest "upgrade" you can give a mature Monstera.

Propagation: Where to Cut

Monstera propagates from node cuttings — sections of stem that include at least one node (the bump where a leaf and aerial root emerge). The aerial root accelerates rooting because it's already partly differentiated for that job.

Steps that work consistently:

• Identify a node. Look for the swollen point where a leaf petiole meets the stem. An aerial root usually emerges from the same point or just below.
• Cut about 1 cm above the node. Below the node leaves the cutting without an active growth point. Above gives a clean piece with the node intact.
• Remove the lowest leaf if there are multiple. Cuttings with too many leaves transpire faster than they can absorb water before rooting.
• Choose water or soil. Water propagation: roughly 85% success rate in clear water, change every 3-4 days. You can watch the roots grow, which is half the appeal. Soil propagation: roughly 70% success rate in well-draining aroid mix, but the resulting plant skips the awkward water-to-soil transition phase that sometimes kills water-rooted cuttings. Both work.
• Keep at 22-26°C and 60%+ humidity. A clear plastic dome or zip-lock bag tented over the cutting raises local humidity. Roots within 2-4 weeks if the node has an aerial root; 4-8 weeks if not.

If you're new to aroid propagation broadly, our philodendron vs monstera comparison covers genus differences that affect cutting behavior, including which species are easier to root.

My 18-Month Pyrmont Timeline

The Monstera in my Pyrmont apartment had no aerial roots when I bought it from a market about 18 months ago. Through the first 6 months it focused on leaf production — six new leaves, all fenestrated, no aerial root activity. Then in late spring, two aerial roots emerged from the same node in the same week. Over the next 12 months, three more emerged from higher nodes.

Aerial root #1 — emerged south of the main stem, grew toward a power outlet behind the plant within 3 months. I cut it about 1 cm from the stem; the plant didn't notice.

Aerial root #2 — emerged east, grew straight down. Once it reached about 25 cm long, I gently guided the tip into the soil at the edge of the pot. Two weeks later it had visibly thickened. Over the next 4 months the plant's leaf production doubled (one new leaf every 2 weeks instead of one every month). I have no other explanation; nothing else changed.

Aerial roots #3 and #4 — emerged from a higher node, both heading outward. I added a moss pole, soaked it, and tied each root against it loosely with soft ties. Within 5 weeks both had attached. The plant began growing taller and noticeably stronger; the leaves on new growth were larger than the older ones.

Aerial root #5 — emerged most recently, no decision needed yet. Pointed toward the moss pole; it'll attach itself.

Out of five aerial roots: cut 1, redirected 2 to pole, redirected 1 into soil, leaving 1 alone. Roughly the distribution I'd expect for any healthy maturing Monstera in an indoor setting.

For Monstera owners also troubleshooting yellowing leaves alongside aerial root questions, our Monstera yellow leaves diagnosis handles that separately. Yellowing is rarely related to aerial roots; the two issues have different causes and treatments.

FAQ

Will cutting aerial roots hurt the plant?

Cutting one or two aerial roots from a healthy Monstera causes minor stress at most. The plant seals the cut within a few days and continues normally. Cutting many aerial roots at once, or cutting all of them, removes a meaningful amount of supplementary water and stability function and can stress the plant. The general guideline: if you can leave it alone, leave it alone.

Can aerial roots replace soil roots?

Not in normal Monstera growth, no. Aerial roots can convert to feeder roots when planted into soil or water, but they're supplementary, not a replacement. The main soil root system is still doing the bulk of nutrient and water uptake. Aerial roots are bonus capacity.

Why are mine brown and crispy?Dehydrated. Aerial roots absorb humidity from the air; if your indoor humidity is below 40%, aerial roots can't function and start to desiccate. The fix is raising overall humidity (a humidifier helps; misting individual roots is a band-aid). Brown roots that have completely dried out won't recover, but they often indicate a wider humidity problem affecting leaves too.

Should I water aerial roots?

Misting them once or twice a week if your humidity is low gives them moisture to absorb. Don't soak the stem itself for extended periods — that can rot the stem. A light mist on the aerial roots only is fine.

Can I plant them in the same pot?

Yes, and this is one of the best things you can do for a maturing Monstera. Guide a long aerial root into the soil at the pot's edge, bury the tip 2-3 cm, and the root converts to a feeder within weeks. The plant's overall growth rate increases noticeably. No special tools or potting mix required.

Do they cause damage to walls or wood?

Rarely. Monstera aerial roots aren't aggressive grippers like ivy. They need a porous surface (moss, coir, soil) to attach. Smooth surfaces like painted walls or sealed wood don't support attachment. The exception is if a root finds a crack or seam — redirect or cut in that case to prevent the root from working into the gap.

How are aerial roots different from root rot roots?

Aerial roots are above the soil, firm, often green-tipped, growing from stem nodes. Root rot affects the soil roots only — you'd see it by unpotting the plant and finding dark brown or black roots that smell sour and feel mushy. The two have nothing to do with each other; healthy aerial roots can coexist with severe root rot below the surface, and vice versa. If you suspect root rot, our diagnosis on differentiating root rot from aerial roots in pothos applies in similar form to Monstera.

Sources

• Royal Horticultural Society (RHS). Monstera deliciosa care guide. Aerial root function and care.
• Missouri Botanical Garden. Monstera deliciosa. Native habitat and physiology.
• Putz, F.E. and Holbrook, N.M. (1986). Notes on the natural history of hemiepiphytes. Selbyana. Field study of climbing aroids and aerial root behavior.
• Royal Botanic Gardens Sydney. Indoor aroid care for temperate Australian conditions. Practical care notes for Monstera and related genera.
• Mayo, S.J., Bogner, J., and Boyce, P.C. (1997). The Genera of Araceae. Royal Botanic Gardens Kew. Reference text on aroid morphology, including aerial root development.
• Greg App and Houseplant 411 community archives. Practical owner-reported propagation success rates for Monstera nodal cuttings with and without aerial roots.