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Step 1
Check leaves of the plant for yellow or brown spots, especially at the tips. Brown spots indicate too much heat or a lack of humidity. Move the plant out of direct sunlight or filter its light with a see-through curtain. Humidity can be amended by placing the plant on a tray or pebbles.
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Step 2
Turn leaves over to look for insects. Underneath leaves is a popular hiding spot for whiteflies, aphids and spider mites. Sometimes insects look like spots, so investigate closely. Treat infested plants with a general purpose houseplant insecticide spray or powder.
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Step 3
See what the new growth looks like. If it is spindly or pale the houseplant is suffering from a lack of light, fertilizer or water. If it's wilted or brown and shriveled, the plant likely has too much fertilizer, too much light or been exposed to temperature fluctuations. Adjust your care appropriately.
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Step 4
Look for a sudden change in color. A houseplant which has become paler is probably in need of more light, more fertilizer or more water.
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Step 5
Notice if the houseplant is wilting and has leaves that are yellowing and eventually falling off. This is a symptom of over watering. Give the plant less water and make sure it has adequate drainage.
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Step 6
Observe the roots. If they are coming through the drainage holes, remove the root ball from the pot and investigate further. If the roots are wound tightly at the bottom, loosen the roots and repot the houseplant in a bigger pot so not to stifle growth. If they're only beginning to wrap around the bottom, watch the plant closely and repot soon.
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Step 7
Delight in knowing your houseplant is healthy if none of these symptoms are present.
