Most indoor plant problems in Australia trace back to water: too much of it, too little, or the wrong amount for the season. Start with the soil, not the leaves. The table below matches what you’re looking at to the most likely cause, and each section that follows links through to the full fix.
Jump to: The 60-second triage · Yellow leaves · Brown tips · Too much or too little water · Bugs · Drooping and stalled growth · Australian conditions · When it can’t be saved · Prevention · What we keep on the shelf · FAQs
The 60-second triage
Before you read a word of this: put a finger 3cm into the mix. Half the diagnoses below turn on whether it comes out damp or dry.
| What you’re seeing | Most likely cause | Where to go next |
|---|---|---|
| Lower leaves yellowing, mix still damp | Too much water | Yellow leaves |
| Whole plant pale, new leaves small | Not enough light, or no feed since summer | Drooping and stalled growth |
| Brown crispy tips or edges | Dry air | Brown tips |
| Sudden droop, mix bone dry | Too little water | Water |
| Sudden droop, mix wet and smelling sour | Root rot | Water |
| Small black flies around the pot | Fungus gnats breeding in wet mix | Bugs |
| Sticky leaves, white cottony spots, fine webbing | Mealybugs, scale or spider mites | Bugs |
Why are the leaves turning yellow?
A yellow leaf is the plant deciding it can’t afford that leaf any more. The question is what it can’t afford: water it’s drowning in, light it isn’t getting, or nutrients that ran out three months ago.
Check the position of the yellowing first. Lowest and oldest leaves going soft-yellow while the mix stays damp is overwatering, and it’s the most common version by a distance. Yellowing spread evenly across the whole plant, with new leaves coming in smaller than the old ones, is a light or feeding problem instead.
One yellow leaf on an otherwise healthy plant is not a problem. Plants shed old leaves the way trees do, just one at a time and out of season. Three at once, or a new one every week, is a signal.
Read the full guide → Indoor plant leaves turning yellow
Why are the leaf tips brown and crispy?
Dry air. Brown, papery tips and edges on an otherwise green leaf are almost always humidity, and in Australian homes the usual culprit is air-conditioning or a heater running in a closed room.
Ferns, Calatheas and anything with thin leaves show it first. Thick-leaved plants like Peperomias and rubber trees rarely show it at all, which is a useful diagnostic in itself: if the fern has crispy tips and the Baby Rubber Plant beside it looks fine, the room is dry rather than the watering being wrong.
Trim the brown part off with scissors if it bothers you, following the natural shape of the leaf. It won’t grow back green, so the fix is the room, not the leaf. Grouping plants together, a pebble tray, or moving the plant into a bathroom all work better than misting.
Dry air has a second cost worth knowing about. Two-spotted mite — the spider mite you’ll meet on an indoor plant — builds up fastest in exactly these conditions: Business Queensland records that populations “increase rapidly in hot dry weather”. So a room that crisps leaf tips is also a room that grows mites, and lifting the humidity does two jobs at once.
Read the full guide → How to increase humidity for plants
How do you tell overwatering from underwatering?
They look nearly identical from above, and that’s why so many plants get watered to death. A thirsty plant and a drowning plant both droop, both go yellow, and both look like they need a drink. The mix tells you which is which.
Underwatered. Mix is dry 3cm down and often pulled away from the sides of the pot. The pot feels light. Leaves are limp but their edges may be crisp, and the plant perks up within hours of a proper soak. Water until it runs out of the drainage hole, then empty the saucer.
Overwatered. Mix is damp or wet 3cm down, sometimes with a sour smell. The pot feels heavy. Leaves are limp and soft rather than crisp, the lowest ones yellow, and watering makes it worse. Stop watering. Move it somewhere brighter and warmer so the mix can dry, and check again in a week.
If the mix is wet, the smell is sour, and the stem is soft where it meets the soil, you’re past overwatering and into root rot. That needs the plant out of the pot, the black mush cut off the roots, and fresh mix.
The root pathogens behind it are water-driven rather than neglect-driven, which is the part people find counter-intuitive. Business Queensland describes Phytophthora cinnamomi as a soil-borne organism whose damage shows up as “feeder roots are black, decayed and few in number”, with severe waterlogging bringing on rapid decline, and lists improving drainage as the first line of prevention. In a pot, drainage is the hole in the bottom, the mix you used, and whether the saucer gets emptied.
Read the full guide → How to bring a dying plant back
What are these bugs on my plant?
Identify before you treat. Four things turn up on indoor plants in Australia, they look nothing alike, and the response is different for each.
- Fungus gnats. Small black flies drifting up from the pot when you walk past. The adults are harmless; they breed in permanently wet surface mix. Let the top of the mix dry properly between waterings and the cycle breaks.
- Mealybugs. White cottony clumps tucked into leaf joints and along stems. Wipe them off with a damp cloth, check the undersides of every leaf, and keep the plant away from its neighbours for a few weeks.
- Spider mites. Fine webbing in the leaf axils, with a stippled, dusty look to the leaf. Business Queensland describes the damage as “yellow mottled or stippled areas, particularly on the underside of leaves”, and notes the mites multiply fastest in hot dry weather — the same conditions that cause brown tips. Rinse the foliage under the tap and raise the humidity.
- Scale. Hard brown or tan bumps along stems and leaf veins that don’t move when you touch them. Business Queensland’s soft brown scale entry is the reference for what you’re looking at. Scrape them off with a fingernail or a blunt knife.
Whatever it is, isolate the plant the moment you find it. Move it out of the group, into a room of its own, and give it a fortnight before it rejoins.
Related → How to clean plant leaves naturally
Why is it drooping, or not growing at all?
Drooping is a water question and stalled growth is a light question, and the two get confused constantly.
For drooping, go straight to the finger test above. There is no third cause worth chasing until you know whether that mix is wet or dry.
Stalled growth is different, and in winter it isn’t a problem at all. Between June and August most indoor plants slow down or stop, which is normal and expected. If nothing new has appeared by late spring, look at light before you look at fertiliser: new leaves coming in smaller than the old ones, on longer and longer stems, means the plant is reaching for a window it can’t find.
Variegated plants give you an early warning here. When the marbling on a Marble Queen Pothos or the pink in a Ficus Elastica Ruby fades back towards plain green, the plant is telling you the position is too dark, several weeks before growth stops.
Indoor plant problems in Australian conditions
Most troubleshooting advice online was written for the Northern Hemisphere, which puts its seasons six months out and its window aspects the wrong way round. Both errors cause real damage here.
Winter is June to August. That is when overwatering peaks, because the watering habit carries over from summer while the plant’s water use halves. Stop feeding entirely for those three months, and stretch the gap between waterings rather than keeping the schedule.
Spring is September to November. This is repotting and feeding season, and it’s also when a plant that looked stalled all winter suddenly needs attention again.
Brisbane and the subtropics. Humidity means brown tips are rare and root rot is common. Mix stays wet far longer through a humid summer, so a plant can drown in the exact conditions that make its leaves look excellent.
Melbourne, Hobart and Adelaide. Winter light is the limiting factor. Plants go leggy and lose variegation between May and August in a position that suited them all summer, and moving them closer to the glass fixes more than feeding ever will.
Perth, and west-facing windows anywhere. Bleached patches on the leaves facing the glass are sunburn, not disease. Late-afternoon summer sun through glass is fierce, and a sheer curtain is the whole solution.
Air-conditioning. A vent blowing across a plant produces crispy tips and leaf drop that look like a watering fault. Move the plant, not the watering can.
When can a plant not be saved?
Sometimes the honest answer is that it’s gone, and we’d rather say so than sell you three more weeks of hope.
The plant is finished when the stem is soft and hollow all the way down to the soil, when every root that comes out of the pot is black and falls apart between your fingers, or when there is no firm green tissue left anywhere. Scrape a fingernail down the main stem: brown and dry the whole length, with no green under the surface, and there is nothing left to grow from.
If a plant arrives in poor shape, or fails within its first month with you, that’s what our 30-day plant guarantee is for. It covers the plant and the journey, not a pot that was left dry for six weeks, and we’d rather be plain about the difference. The returns and guarantee page has the detail, and our team would rather hear from you early than late.
How do you stop it happening again?
Four habits prevent most of what’s on this page.
Check before you water, every time. Finger 3cm in. It takes two seconds and it makes every other rule redundant.
Change one thing and wait three weeks. Watering more, moving the pot, feeding and repotting all at once is how a plant with one problem ends up with four, and how you learn nothing about which fix worked.
Match the season, not the calendar. Feed September to February, stop June to August, repot in spring. Our Baby Rubber Plant card has the right attitude for the quiet months:
“A bit of an introvert, really: water me sparingly, leave me be, and I’ll do my thing.” — from our Baby Rubber Plant care card
Look at the plant weekly, even when nothing’s wrong. Undersides of leaves, surface of the mix, base of the stem. Everything above is easier to fix in week one than in week six.
When spring arrives, spring plant care covers the reset properly: what to repot, when to start feeding again, and how to bring a plant out of winter without shocking it. And if you’re going away, watering plants while you’re away is the one to read before you pack, not after.
For the plant-by-plant version of all of this, our Indoor Plant Care Library has a guide per plant, each with the light and water lines copied straight off the printed card that came in the box.
What we keep on the shelf for this
Three things do most of the work, and none of them is a rescue product. They’re what stops you needing one.
A 4-in-1 smart sensor settles the wet-or-dry question for anyone who’d rather not guess, and it’s the single most useful thing you can put in a pot you keep overwatering. Indoor plant food handles the pale, stalled, hasn’t-been-fed-since-February case, from September onwards. And a bottle of leaf shine plus a soft cloth gets the dust off, which is also how most people find mealybugs and scale early.
Dispatched from our Queensland nursery in low-waste, plastic-free packaging, 3–5 business days to most metro areas.
Plant first aid FAQs
Should I cut off yellow leaves?
Yes, once they’re more yellow than green. The plant has already stopped feeding that leaf and won’t reclaim it, so removing it tidies the plant and makes new problems easier to spot. Cut close to the stem with clean scissors. Leave anything still mostly green alone.
Is it normal for an indoor plant to drop leaves in winter?
Usually, yes. Between June and August most indoor plants slow right down and shed a few of their oldest, lowest leaves, particularly Ficus. A steady trickle is normal; several leaves in a week, or new growth turning yellow, is not, and that points back to watering.
Why does my plant look worse after I repotted it?
Repotting disturbs roots, and the plant sulks for two to four weeks while it rebuilds them. Droop and a couple of lost leaves are expected. Keep it out of direct sun, water only when the top 3cm is dry, and don’t feed until you see new growth.
How long should I wait to see if a plant is recovering?
Three weeks for a sign, a full season for a verdict. Recovery shows up as new growth rather than as old leaves greening back up, so watch the tip of the plant. Damaged leaves stay damaged, which is why the new leaf is the only honest scoreboard.
The Good Plant Co nursery team · our roots · Last updated 28 July 2026