Spider plant: lower leaves turning yellow

What it is likely to be on spider plant

1. Underwatering

   Candidate 1common on this plant

   ·source

   Sourced guidancehigh confidence

   • Royal Horticultural Society: Watering

   Checked 2026-08-13

   Easier to correct than overwatering and easily confused with it, because a plant short of water and a plant drowning both wilt. The distinguishing observation is not the plant at all — it is the compost, and it takes two seconds to check.

   Points towards it

   • · the compost is dry, which is what this cause requires
   • · a plant short of water is short of it everywhere

   Argues against it

   • · the compost is wet, so the plant is not short of water at the root — this rules it out entirely.

   Check this next

   Lift the pot. These three are all thirsty plants that dry out fast in summer — a pot noticeably light for its size, with dry compost well below the surface, is the answer, and if water then runs straight through without wetting anything the compost has gone hydrophobic and needs soaking rather than watering.

   What to do now

   Water thoroughly until it runs from the base, then water more often rather than more heavily. If the water runs straight through, stand the whole pot in a bowl of water for half an hour instead.

   ·source

   Sourced guidancehigh confidence

   • Royal Horticultural Society: Watering

   Checked 2026-08-13

2. Overwatering

   Candidate 2very common on this plant

   ·source

   Sourced guidancehigh confidence

   • Royal Horticultural Society: Overwatering

   Checked 2026-08-13

   Not a matter of volume but of frequency: roots need air as well as water, and compost that never dries suffocates them. It kills more houseplants than every pest and disease combined, and its cruellest feature is that the early signs — yellowing, wilting, dropping leaves — look exactly like drought, so the instinct is to water more.

   Points towards it

   • · the compost is wet and the plant is yellowing anyway
   • · saucers and cachepots left full are the commonest cause
   • · roots short of air affect the whole plant rather than one old leaf

   Argues against it

   • · the compost is dry, so the roots are not short of air — this rules it out entirely.
   • · a single lowest leaf yellowing on an otherwise healthy plant is ordinary ageing rather than waterlogging

   Check this next

   Count the yellow leaves and feel the compost at depth. One lowest leaf on a plant that is otherwise growing well is normal ageing; several at once with wet compost is waterlogging, and the next step is to tip the plant out and look at the roots rather than to feed it.

   What to do now

   Empty the saucer or cachepot and stop watering until the top few centimetres are dry. Do not feed a yellowing plant in wet compost — the roots cannot take up what is already there, and feeding adds salts to a root system that is already struggling.

   ·source

   Sourced guidancehigh confidence

   • Royal Horticultural Society: Overwatering — recovery

   Checked 2026-08-13

3. Fertiliser scorch

   Candidate 3common on this plant

   ·source

   Sourced guidancemoderate confidence

   • Royal Horticultural Society: Fertiliser damage

   Checked 2026-08-13

   Damage caused by too much fertiliser rather than too little: brown crisp leaf tips and margins, a white crust on the compost surface or pot rim, and roots that are brown at the tips. It is easily mistaken for underwatering, and watering more makes it worse if the feed continues.

   Points towards it

   • · spider plants accumulate salts readily and show it sooner than most
   • · salts build up in a pot in a way they do not in open ground

   Argues against it

   • · fresh compost removes accumulated salts, so scorch is unlikely to be the cause now — this rules it out entirely.

   Check this next

   Look at the compost surface and the pot rim for a white crust, and check whether the leaf tips browned before the yellowing spread. Spider plants show accumulated salts earlier than almost any other houseplant, and the answer is to stop feeding rather than to feed more.

   What to do now

   Stop feeding and flush the pot through with plenty of clean water, letting it drain freely to carry the salts out. Scrape any crust off the surface first, and resume feeding at half the label rate at most.

   ·source

   Sourced guidancemoderate confidence

   • Royal Horticultural Society: Fertiliser damage — recovery

   Checked 2026-08-13

Narrow it down

This page lists everything at once, which is the right shape for reading and the wrong shape for deciding. The interactive tool asks one question at a time, starting with whichever would separate these causes fastest, and stops as soon as further answers would not help.

Opens with the plant and the symptom already set. Nothing you answer is stored or sent anywhere — the answers live in the address bar and nowhere else.

What this does not cover

These are the causes GrowingHQ holds rules for on spider plant — not every cause there is. Where several problems look alike, the honest answer is often that they cannot be told apart by eye, and a page that named one would be guessing. If none of the above fits, the general lower leaves turning yellow page lists causes across all plants, and the Spider plant profile lists the problems it is prone to.