Most likely cause

Overwatering is the top cause of a yellowing Spider Plant. They grow from thick, fleshy roots that store water, so they cope poorly with constantly wet soil, and roots deprived of air quickly begin to rot and stop feeding the leaves. The result is broad yellowing rather than the tip browning these plants are also known for.

You can confirm it by the pattern. Overwatering yellows leaves that feel soft and limp rather than crispy, the soil stays wet for days, and the base of the plant may feel mushy. If the pot has no drainage or sits in a full saucer, this is almost certainly the driver. Let the soil dry to the top inch, empty the saucer, and the yellowing should stop spreading.

Other causes

These rank below overwatering but often overlap with it.

  • Too little light. A dim spot fades the foliage; leaves turn a pale, washed-out yellow-green and growth gets thin and leggy.
  • Natural aging. A single old lower leaf yellowing slowly is normal; only the outermost, lowest leaves are affected and the center looks healthy.
  • Underwatering. Prolonged drought stresses the roots; the soil is bone dry, leaves yellow with crispy tips, and the soil pulls away from the pot.
  • Nutrient deficiency. Old, exhausted soil runs short on feed; the whole plant pales to an even yellow across many leaves at once.

How to fix it

  1. Check the soil. Feel the top inch. If it is wet, hold off watering until it dries out.
  2. Improve drainage. Make sure the pot drains freely and empty any saucer so the roots never sit in water.
  3. Water consistently. Water when the top inch is dry, using filtered or distilled water to avoid tip burn, until it drains from the base.
  4. Adjust the light. Move the plant to bright indirect light, out of both deep shade and harsh direct sun.
  5. Remove spent leaves. Cut fully yellow leaves at the base with clean scissors to redirect energy to healthy growth.
  6. Refresh feeding. During spring and summer, feed at quarter to half strength every few weeks if the soil is old and tired.
CauseTell-tale signFix
OverwateringSoft limp leaves, wet soilLet top inch dry, improve drainage
Too little lightPale yellow-green, leggy growthMove to bright indirect light
Natural agingSingle oldest lower leaf onlyTrim it, no action needed
UnderwateringBone-dry soil, crispy tipsWater thoroughly, keep evenly moist
Nutrient deficiencyEven pale yellowing overallFeed at quarter strength