How to Water a Monstera (Stop the Yellow Leaves)

Most indoor Monsteras don’t die from neglect — they drown. If your Monstera deliciosa has yellowing leaves, droopy stems and damp soil that never quite dries out, you’re watering it too often. It’s the single most common mistake, and the fix is small: stop watering by the calendar, start watering by the soil.

This guide covers exactly when, how, and how much to water a Monstera through every season — plus how to read the warning signs before yellow leaves turn into root rot.

Quick answer

Water your Monstera deliciosa when the top 2–3 cm (1 in) of soil is dry to the touch — usually every 7–14 days indoors. Water deeply until it runs out of the drainage holes, then tip the saucer empty. Use room-temperature filtered or distilled water. In winter, cut watering frequency by about 50%. Skip the schedule and check the soil every time — overwatering is what kills most Monsteras, not under-watering.

Why most Monsteras die from overwatering, not under

Monstera deliciosa is a tropical aroid from the rainforests of Central America. In the wild it climbs tree trunks as a hemi-epiphyte, with thick aerial roots that grip bark and a small rootball that drains the moment a downpour ends. Those roots are built for high humidity around the leaves and oxygen around the roots — never standing water.

When you water on a fixed weekly schedule indoors — 250 ml (about 1 cup) every Sunday no matter what — the lower roots stay constantly wet. Without oxygen, they suffocate, then Pythium and Phytophthora fungi move in. The first sign is yellow lower leaves. By the time you notice, the rootball is already mushy. Underwatering, by comparison, mostly just curls the leaf edges; it almost never kills a healthy Monstera in under a month.

The takeaway: when in doubt, wait a day. A slightly thirsty Monstera recovers in an hour. A waterlogged one takes weeks of repotting and root pruning to save.

How to test if your Monstera needs water

You only need two tools, and one is your finger.

The finger test

Push your index finger 3–4 cm (1.5 in) straight down into the soil, near the edge of the pot so you don’t damage the main rootball. If it comes out dry and crumbly, water. If it comes out cool and damp, wait 2–3 days and check again. This is the test most experienced growers actually use.

A moisture meter

For deeper pots — 25 cm (10 in) and up — your finger can’t reach where the roots actually are. A cheap probe-style soil moisture meter pushed 5–10 cm (2–4 in) into the rootball gives you the answer in two seconds. Water when it reads “dry” or 1–2 on a 1–10 scale. Don’t water at “moist” or higher.

What the leaves tell you

• Soft drooping with dry soil → thirsty, water now.
• Soft drooping with wet soil → root rot starting, do NOT water.
• Yellow lower leaves, soggy soil → overwatering, let dry fully and check roots.
• Brown crispy edges → underwatered or low humidity, water and raise humidity.

Watering technique: deep and slow

Once the soil is dry enough, water properly. Most people pour a small amount and stop — that wets only the top of the rootball and leaves the lower roots dry, which is how plants get both overwatered AND underwatered at the same time.

The right method:

1. Take the pot to the sink or a tray.
2. Pour room-temperature water slowly around the soil surface, under the canopy, using a long-spout watering can.
3. Keep pouring until water runs out of the drainage holes for at least 10 seconds.
4. Let the pot drain fully for 5–10 minutes.
5. Tip the saucer empty. Never let the pot sit in standing water.

Aim for roughly 20–25% of the pot’s volume — for a 20 cm (8 in) pot that’s about 500–700 ml (17–24 fl oz). The drainage runoff is your real signal: if nothing comes out, you didn’t use enough.

What kind of water to use

Tap water works for most Monsteras, but not all. The two things to watch for:

• Chlorine. Dissipates within 24 hours if you let tap water sit out uncovered. If your tap is heavily chlorinated and you see white edges on new leaves, switch.
• Fluoride. Many municipal supplies fluoridate water at 0.7–1 mg/L, and Monstera deliciosa is mildly fluoride-sensitive. The classic symptom is brown leaf tips on otherwise healthy leaves. If that’s happening, use filtered, distilled, or rainwater.

Rainwater is ideal — slightly acidic, mineral-light, and free. Filtered water from a basic carbon filter handles chlorine and most fluoride. Avoid softened water entirely; the sodium burns roots.

Always bring water to room temperature, around 20°C (68°F), before pouring. Cold water shocks tropical roots and slows growth for days.

Seasonal adjustment

A Monstera’s water need tracks light and temperature, not the calendar.

Season	Frequency	Why
Spring (Mar–May)	Every 7–10 days	Days lengthen, growth accelerates
Summer (Jun–Aug)	Every 5–9 days	Peak growth, soil dries fastest
Autumn (Sep–Nov)	Every 10–14 days	Light drops, growth slows
Winter (Dec–Feb)	Every 14–21 days	Roughly 50% less than summer

In winter, indoor heating dries leaves but also slows root activity. Cut watering by about half versus summer and check the soil before every pour — the schedule above is a starting point, not a rule.

Pot and soil drainage requirements

You can water perfectly and still kill a Monstera if the pot and mix don’t drain. Three non-negotiables:

1. Drainage holes. A pot without holes is a death sentence for an aroid. If you love a decorative pot without holes, use it as a cachepot — slip the plastic nursery pot inside, and lift it out to water.
2. Chunky aroid mix. Standard houseplant compost is too dense — it holds water in a tight matrix the roots can’t breathe through. Use roughly 40% bark, 30% peat-free potting mix, 20% perlite, 10% coco coir or charcoal. Water should drain through in under 30 seconds.
3. Right pot size. Only 2–3 cm (1 in) wider than the rootball. A pot that’s too big holds wet soil far from the roots — that soil never dries and rots the rootball from the outside in.

A free plant care app like Tazart tracks the watering window for your specific pot size, light level, and local weather, and pings you on Apple Watch when it’s time — handy if you’re juggling several aroids alongside your Monstera.

Common mistakes to avoid

• Watering on a fixed schedule. “Every Sunday” ignores light, season, humidity, and pot size. Always check the soil first.
• Using cold water straight from the tap. Shocks tropical roots and slows growth for several days. Let it warm to 20°C (68°F).
• Leaving runoff in the saucer. Roots sitting in 1 cm (½ in) of water rot within 48 hours. Tip the saucer empty after every watering.
• Watering little and often. Wets only the top, leaves lower roots dry, encourages shallow rooting. Always water deeply.
• Misting the leaves to “help” between waterings. Doesn’t reach the roots, encourages bacterial spotting on the leaves. Aim humidity at the air, not the foliage.
• Ignoring drainage when repotting into a decorative pot. Even one watering in a pot without holes can drown a Monstera.

Troubleshooting

Symptom	Likely cause	Fix
Yellow lower leaves, soggy soil	Overwatering / root rot starting	Stop watering, let mix dry fully, check roots — repot into chunky aroid mix if any are mushy
Brown crispy leaf edges	Underwatering, fluoride in tap water, or low humidity	Water deeply, switch to filtered/rainwater, raise humidity to 50–60%
Drooping leaves despite wet soil	Root rot — roots can’t take up water	Unpot immediately, cut off mushy black roots with sterile shears, repot in fresh dry mix
New leaves small with no fenestrations	Not enough light, sometimes paired with overwatering stress	Move to brighter indirect light (1 m / 3 ft from a south/east window) and water consistently
Mushy stems at the base	Advanced root rot reaching the crown	Take a healthy top cutting and propagate; the parent is unlikely to recover
Sour or swampy smell from the pot	Anaerobic soil, root rot in progress	Repot now into fresh chunky mix; do not water for 5–7 days after to let cut roots callus

Watch: how to water a Monstera

A short visual walkthrough pairs well with the steps above. If you’re a visual learner, watch a quick Monstera deliciosa watering tutorial on YouTube and then come back to use the soil-test method here every time you reach for the watering can.

Related reading

• Swiss cheese plant care (Monstera adansonii) — same family, same watering principles, smaller leaves with closed holes.
• How to take care of a prayer plant — pairs well with Monstera in a humid jungle corner.
• Pothos plant care — even more forgiving aroid, perfect first plant to practice the dry-then-deep watering rhythm.
• Scan any new aroid you bring home with the free Tazart plant identifier and let it set up the watering schedule for you automatically.

A note on conditions

Every home is different. Light intensity, pot size, mix composition, season, humidity, and your local weather all change how fast a Monstera dries out and how often it needs watering. Use the windows above as a starting point, then adjust based on what your soil actually does in week two — that’s how every confident aroid grower learns.