Monstera Aerial Roots — What They Are and What to Do With Them
Monstera (Monstera deliciosa)
Symptoms
- aerial roots
- roots growing from stems
- brown rope roots
- roots coming out of plant
- long hanging roots
- green nub emerging next to a leaf node
- root tip with a hard brown cap
Causes
Normal growth behavior
Aerial roots are a natural feature of Monstera deliciosa, not a sign of any problem. In the wild, these roots serve two functions: absorbing moisture from humid rainforest air and anchoring the climbing stem to tree bark as the plant ascends toward the canopy. Every mature Monstera produces aerial roots from its stem nodes, typically wherever a leaf grows. Botanically these are true adventitious roots — roots that form from stem tissue rather than from the plant's original root system — and Monstera deliciosa is unusual among common houseplants in producing them so visibly and prolifically indoors.
Climbing maturity signal
As Monstera plants mature, they produce more aerial roots — this is a sign of a healthy, actively growing specimen. A Monstera with abundant aerial roots is doing what it's biologically programmed to do in its adult growth phase. More aerial roots generally correlates with larger, more fenestrated future leaves, since in the wild the plant only reaches the light levels needed to produce large split leaves once it has climbed a support using those same roots.
High humidity environment
In humid environments, aerial roots may be more vigorous and branched, actively absorbing atmospheric moisture. In dry environments, the same roots may appear thinner and more cord-like. Neither state is unhealthy — the difference simply reflects how much moisture the root tip is able to draw directly from the surrounding air rather than relying solely on the potting mix.
A node close to the soil line rooting into the pot on its own
A young or lower-growing aerial root that happens to be close to the soil surface will sometimes find its own way into the potting mix without any help, curling downward and thickening once it makes contact with moist soil. This is not a sign of stress; it's simply the root behaving the way it would on a trunk near forest floor humus in its native range.
New root emergence mistaken for disease
A brand-new aerial root starts as a small, blunt, often reddish-brown or pale nub pushing out from the stem right at a node, and to an unfamiliar eye this can look like a growth, a wound, or even a pest gall. It's simply the root cap — a protective tip structure — pushing through the stem's outer layer, and within a week or two it elongates into the recognizable narrow, ropey aerial root shape.
How to Fix It
- 1
Decide what to do based on your aesthetic preference and growing goals. Option 1: Direct aerial roots into the soil by gently bending them toward the potting mix. Over time they can absorb soil moisture, which can supplement the plant's water intake. This is particularly useful for large specimens.
- 2
Option 2: Train aerial roots onto a moss pole or coir totem. As they attach to the moist pole, they increase the plant's humidity access and encourage more vigorous, mature leaf growth. The moss should be kept slightly moist. This is the most horticulturally beneficial option for maximizing leaf size and fenestration.
- 3
Option 3: Simply leave them. Tucking them into the pot or allowing them to hang decoratively both cause no harm. Monstera with trailing aerial roots in a hanging basket or elevated pot is an entirely valid aesthetic choice.
- 4
If aerial roots are extremely long and genuinely problematic for your space: trim individual roots cleanly with sterile scissors. This does not harm the plant — it simply removes excess root growth. Don't trim all aerial roots simultaneously on a large specimen, but removing a few as needed is fine.
- 5
If a new nub emerging from a node is unfamiliar and you're unsure whether it's an aerial root, a leaf node, or something wrong, leave it alone for one to two weeks and watch it. A genuine aerial root will elongate into a thin, tapering, rope-like structure with a hard brown-tipped cap; a new leaf node will instead swell and eventually unfurl a cataphyll. Nothing about the wait period risks the plant either way.
- 6
When mounting a Monstera on a moss pole for the first time, gently guide existing aerial roots against the pole's surface with a soft plant tie rather than forcing them, since aerial roots are brittle when young and snap fairly easily if bent sharply. Roots that touch the moist pole surface will typically attach on their own within a few weeks.
Prevention
- There's nothing to prevent — aerial roots are desirable and healthy. Embrace them.
- If you prefer a tidier look, train roots into a moss pole rather than trimming them — the plant benefits and your space looks organized
- Avoid yanking a Monstera loose from a support if roots have attached — cut the root close to the pole instead of tearing it free, since tearing can damage the stem tissue at the node
- Mist aerial roots occasionally in dry indoor air if you want them to stay supple and actively absorb moisture, though this is cosmetic and not required for plant health
Normal vs. When to Worry
Normal: any number of aerial roots emerging from stem nodes, whether thick and branched or thin and cord-like, brown, tan, or greenish in color, and whether they grow toward the soil, toward a pole, or simply hang in the air. Worry: this is one of the few Monstera symptoms with essentially no worry case — aerial roots are never a sign of disease, pest damage, or poor care. The only situation worth a second look is a root tip that is soft, mushy, or foul-smelling rather than firm, which would suggest rot from constant wet contact rather than anything wrong with the root's normal development.
Quick Summary
| What You See | What It Is | What To Do |
|---|---|---|
| Rope-like root from a stem node | Normal aerial root | Leave, direct into soil, or train onto a pole — all fine |
| Small reddish-brown nub at a node | New aerial root just emerging | Wait 1-2 weeks to confirm; no action needed |
| Root has attached itself to soil | Self-rooting for extra moisture uptake | Normal; leave in place |
| Root tip soft, mushy, or smelly | Localized rot from constant wet contact | Trim back to firm tissue; improve airflow around that spot |