SYMPTOM |
CAUSE |
REMEDY |
| Yellowing leaves |
Lack of nitrogen |
Water the plant regularly and include liquid fertilizer. |
| Soft stems |
Too much water or plant set too deep in soil |
Let plant dry out, then establish how much water to give it.
Transplant to larger pot. |
| Curling leaves |
No drainage hole in pot; too much water in roots. |
Transplant to pot with drainage hole; establish a regular watering schedule. |
| Dropping old, young leaves |
Old: sudden decrease in light
New: soil too heavy |
Old: put plant in sunny area.
New: repot with mixture of potting soil and vermiculite. |
| Black, misshapen leaves |
Soil too salty |
Remove plant from pot and flush salts out of soil and roots. Repot. |
| Lackluster leaves during new growth |
Underfed |
Begin fertilizing plant on a regular basis |
| Brown tips on leaves |
Fluoride injury |
Trim off damaged areas; keep soil uniformly moist. |
| Tan spots on leaves |
Too much direct sunlight |
Move plant away from direct sunlight. |
| Black spots on leaves |
Drafts |
Move plant away from sources of drafts (outside doors, heating or cooling units). |
| Spots on leaves, stems |
Insect eggs |
Regularly wash leaves, stems with warm, soapy water. Rinse. Also remove dirt and insecticides. (Don't do this on hairy-surfaced leaves.) |
| White fuzz on leaves
Flying
"dandruff" |
Mealy bug or whitefly |
White fuzz: treat plant with insecticide registered for use against mealy bug, available from local hardware or plant supply stores.
Dandruff: rub leaves with rubbing alcohol every three to four days and treat with insecticide registered for use against whitefly. |
| Brown scales on stems |
Small brown insects |
Rub leaves with rubbing alcohol every three to four days. |
| Web-like matter on leaves' underside |
Red spider |
Wash plant. Treat with insecticide registered for use against Red Spider. |
| Green scum on soil's surface |
Algae and moss |
Remove old topsoil and replace with new. |
| Pale, colorless new leaves that quickly turn brown |
Lack of humidity |
Spray leaves. If possible, raise humidity in room |