Winter is the season most indoor plant deaths happen — and almost always for the same reason: the conditions around the plant have shifted, but the care routine hasn't.

Shorter days mean less light, which slows everything. The plant uses less water, takes up fewer nutrients, and shifts toward maintaining what it has rather than pushing new growth. Meanwhile heating systems dry the air, cold draughts find their way around windows, and the position that worked all summer might be in shadow most of the day by July.

None of that is a crisis. It just means the routine that kept plants thriving in November isn't the right routine for June. The Plant Runner Method — Light → Water → Mix → Feed — gives you the order to think through what needs to change.

Light: the pace-setter

Light drives everything else in winter, more than at any other time of year. The angle of the sun shifts, the days shorten, and a position that was bright and indirect through summer can be genuinely dim by mid-winter.

The first thing to do as the season turns: walk around your home at midday and look at where the light is actually falling. Run the Shadow Test — hand 10cm above a leaf at midday, looking at the shadow. A crisp shadow means good light. A soft, fuzzy shadow means the plant is in lower light than it looks. Plants that passed the test in summer may fail it in winter without the position changing — the light has changed, not the position.

A few practical responses:

• Move plants toward the light source. A few centimetres closer to a window can make a meaningful difference at this time of year.
• Rotate plants more often. Winter light is directional in a way summer light isn't, so plants will lean toward the source faster.
• Consider a grow light if your space is genuinely dim. Cheap LED grow lights have come a long way in the last few years. Worth it if you've got plants suffering in low-light positions and can't move them.

Getting light right is what unlocks the rest. If a plant is starved of light in winter, no amount of adjusting watering or feeding will fix it.

Water: probably the biggest mistake people make

Watering is where most winter plant deaths actually happen. The mechanism is consistent: the plant slows down in lower light and cooler temperatures, it uses water more slowly, the mix stays wet longer between waterings, the roots lose access to oxygen, and the plant starts deteriorating from the bottom up. Winter indoor airflow is often lower too — windows closed, heating circulating but not ventilating — which slows surface drying even further.

The fix isn't a different watering schedule — it's no schedule at all. The plant tells you. The calendar doesn't.

Pot Weight Test: Lift the pot just after watering, then again every few days. You'll quickly notice that the pot stays heavy for much longer in winter than it did in summer. A pot that needed water weekly in January might genuinely not need water for two or three weeks in July.

A few practical notes:

• Yellowing lower leaves and a heavy pot in winter = overwatering. This is the single most common winter symptom. Pull back, check the mix.
• Stop watering on a schedule, even a "winter schedule." The right interval depends on the plant, the position, the mix, and the temperature in your home that week. Lift the pot, decide each time.
• Discard water that collects in saucers. This matters more in winter because evaporation is slower — water sitting in saucers actively keeps the bottom of the pot wet.

Mix: the quiet cause of "watering problems"

If a plant is yellowing in winter and the watering rhythm has been adjusted properly, the next thing to check is the mix itself. Old, compacted mix that's been in the pot for years holds more moisture, drains more slowly, and starves the roots of oxygen — exactly the same problem overwatering causes, but with watering frequency that looks reasonable on paper.

Winter isn't the time to repot — most plants are too slow to recover from the disturbance. But it is the time to diagnose mix problems so you can address them in spring.

Finger Probe Test: Push your index finger as deep into the mix as it'll go. Cool and slightly damp = the mix is working. Wet, heavy and compacted = the mix is too dense, holding too much moisture for the conditions. Dry, crumbly, falling away from your finger = hydrophobic, water running through without being absorbed. Hitting roots = pot-bound. Sour or musty smell = the mix has gone anaerobic and the roots are in trouble.

If you find serious problems — anaerobic mix, soft rotting roots — repot now even though it's the wrong season. A plant rotting through winter is worse than a plant disturbed by an off-season repot. Otherwise note what needs to change and plan for spring.

Feed: when growth pauses, feeding pauses

Most indoor plants slow significantly or stop growing entirely through winter. Some keep growing if they're under grow lights or in genuinely bright warm conditions, but most don't.

The rule is straightforward: feed plants while they're actively growing, ease off when growth slows, stop when growth has paused entirely. Diluted "winter feeding" isn't useful — it just builds up unused salts in the mix that the plant has to deal with come spring. A non-growing plant can't put nutrients to work, regardless of dosage.

If you're not sure whether a plant is genuinely dormant or just slowed: look at the growing point. Active new growth (even slow) means continue feeding at reduced rate. No new growth, no leaf unfurling, no movement = stop until you see growth resume in spring.

Plants under grow lights or in unusually warm bright rooms may continue growing through winter. Those plants stay on the normal feeding rhythm.

The other things to watch for

Once Light → Water → Mix → Feed are sorted, a few non-Method considerations matter through winter specifically:

Heat sources are harder on plants than cold. A position 1.5 metres from a heater, fireplace, or ducted-heating vent is too close — the dry hot air desiccates foliage faster than the plant can replace water from the roots. Same applies to reverse-cycle air conditioning blowing warm air. Shuffle plants away from heat sources before the heater goes on, not after.

Cold draughts cause leaf drop. A plant against a single-glazed window in mid-winter is exposed to surface temperatures well below the rest of the room. Many tropical houseplants begin struggling below 12-15°C, with leaf drop one of the early signs. Move plants inward from windows that get cold overnight.

Humidity drops sharply when heating runs. Indoor humidity in heated rooms can fall to 25-30%, well below what most tropical plants prefer. Grouping plants together creates small micro-climates of higher local humidity. Pebble trays can slightly improve humidity immediately around the plant — useful but modest. Humidifiers help more, if you've got the budget. Misting doesn't help meaningfully — the moisture evaporates too fast to make a difference.

Pests find winter conditions ideal. Warm dry indoor air with stressed plants is exactly what spider mites, mealybugs and scale look for. Inspect plants weekly — particularly the undersides of leaves and the joints where stems meet leaves. Wiping foliage with a damp cloth or Neem Oil Leaf Shine keeps leaves clean and helps you spot problems early.

Dust accumulates faster in winter. With windows closed and heaters circulating air, dust settles on foliage faster than in summer. Dusty leaves can't photosynthesise efficiently — and they need every bit of help, given how much light has dropped. Wipe foliage weekly, more often for large smooth-leaved plants like Monstera and Rubber Plants.

Don't repot through winter unless you have to. Repotting disturbs roots, and dormant plants don't recover from disturbance the way actively-growing plants do. Wait for spring unless you've diagnosed a serious problem (anaerobic mix, rotting roots) that can't wait.

Don't expect immediate recovery after making a change. A plant moved from a poor winter position to a better one may take weeks to look different. Winter recovery is slow. Make the adjustment, then leave it alone for a month.

What to expect

Plants will look different in winter. Slower growth. Some leaf drop, particularly on plants that have been moved or shifted into different light. Foliage may be slightly smaller, slightly paler, slightly less dynamic-looking than it was in February. None of that is a problem if the Method pillars are right — it's the plant doing what it's meant to do in lower-light, lower-temperature conditions.

What's not normal: rapid yellowing across multiple leaves at once, soft mushy stems, mass leaf drop in days rather than weeks, sudden collapse. Those point to a Method problem — most often water + light combined, since winter watering issues are usually a downstream consequence of light issues.

For the longer version of why diagnostic order matters, Why Most Plant Problems Get Diagnosed Backwards covers the underlying logic. The yellow leaves troubleshooting guide is the place to start if winter yellowing is what's brought you to this post.

Winter plant care isn't a different system. It's the same Method, applied to conditions that have changed. Light moves first — and once you understand that, the rest is mostly working out what's downstream.