Spider Plant Brown Tips: Causes and What to Check

Brown leaf tips are the most common spider plant complaint, and our sources name five causes: low humidity, excessively dry soil, salt buildup, fluoride or chlorine in tap water, and too much fertilizer. Wisconsin lists the first four together, and Clemson adds the fertilizer. This guide sits under our main spider plant care guide and walks through each one. We use the word brown here because the sources discuss tip burn rather than yellowing, and this page targets the problem people actually search for.

1. Tap water chemicals

NC State says to avoid watering with tap water, as the chlorine and fluorides can cause leaf tip burn. Wisconsin lists chemicals, particularly fluoride or chlorine in tap water, among the possible causes of brown leaf tips. Two sources name this directly, which makes it the cause with the most support in our research.

The sources do not say what to use instead or how to treat tap water. If you suspect your water, ask your state extension office what works locally.

2. Salt buildup and too much fertilizer

Clemson says leaf tip burn is caused by too much fertilizer or by water that is high in soluble salts. Wisconsin lists salt accumulation, and separately says excessive fertilizer may lead to tip browning. NC State says not to over-fertilize because it decreases plantlet formation.

For feeding, Wisconsin says every 3 to 4 months is usually sufficient, or more often at half strength. If you have fed on a tighter schedule, ease off. Clemson says to feed during active growth with a water-soluble or time-release houseplant fertilizer.

3. Low humidity

Clemson says low humidity and excessively dry soil may also cause brown leaf tips. NC State says the plant grows best in medium air humidity, and Wisconsin says average humidity. Our sources do not give a humidity percentage or a method for raising it, so we do not either.

4. Soil that is too dry

Wisconsin lists excessively dry soil among the causes, and Clemson agrees. The balance is the one in the care guide: Clemson and UF/IFAS say to let the soil dry briefly between waterings, and NC State says the plant is tolerant of drought and dry soil but grows best in moist soil. Brown tips from dryness are about letting the plant go too long, not about the occasional dry spell.

5. Too much water

The sources do not tie overwatering to brown tips. Clemson says too much or too little water, along with insects and mites, are the primary problems, and says root rot usually results from a soil mix that does not drain quickly or from excessive watering. If the soil stays wet and the plant looks poor, check the roots as well as the tips.

Insects

Wisconsin says spider plants generally have few pest problems other than scale insects and mealybugs. Clemson says the most common insect pests include whiteflies, spider mites, scales and aphids. Check the leaves and stems when you water. The sources do not link pests to tip browning and give no treatment.

What to do next

1. Think about your water. Tap water chlorine and fluoride can cause tip burn (NC State, Wisconsin).
2. Cut back the fertilizer. Wisconsin says every 3 to 4 months is usually sufficient, or half strength more often.
3. Check the soil. Let it dry briefly between waterings, but do not let it stay dry for long (Clemson, Wisconsin).
4. Think about the air. Low humidity may cause brown tips (Clemson). Medium humidity is best (NC State).
5. Watch new growth. The aim is for new leaves to stay green. The sources do not say whether old brown tips should be trimmed.

What our sources do not tell you

Our sources do not say how to tell which cause is behind your plant’s tips, whether to trim damaged leaves or how long tips take to recover. If you have tried the list and tips keep browning, take a photo to your state extension office or a master gardener helpline. On pets, the ASPCA’s plant page says non-toxic but its 2019 article says mildly toxic, so see our pet safety page before assuming a nibbled leaf is harmless. For the rest of the plant, go back to the spider plant care guide.