English
| Symptoms | Problems related to growing conditions | Solutions |
|---|---|---|
| Stems become leggy (etiolated) and plant grows toward light source | Insufficient light | Move into brighter light |
| Stems and leaves turn yellow | Iron, magnesium or other mineral deficiency; overwatering; too much calcium in the potting medium; insufficient light | Feed properly with a complete fertilizer (with micro-elements); water less frequently; repot plant; correct pH; move into brighter light |
| Discoloured stems and leaves | Too much sun | Move to a shadier spot |
| Failure to flower | Nitrogen deficiency; phosphorous deficiency; lack of winter rest | Fertilize properly; allow plant to rest in winter |
| Leaves, flower buds or flowers drop off | Insufficient light; over- or underwatering; temperature too cool | Move into brighter light; adjust watering frequency; raise temperature |
| Plant stops growing | Underwatering; mineral deficiency; root rot; natural winter dormancy | Water more frequently; fertilize properly; repot plant; allow plant to remain dormant until spring |
| Base of stems turns woody | Normal aging of the plant | none |
| Yellowish or reddish-brown lesions on the stems that may form corky scars | Too much sun; too cold; too damp, combined with low temperatures and fertilizer too high in nitrogen | Move to a shadier spot, raise temperature, increase air circulation and temperature and fertilize properly |
| Stems and leaves turn soft, leaves become shrivelled | Overwatering | Repot and water less frequently |
| Leaves and flowers turn limp, dry out and drop off; stems dry out |
Underwatering | Gradually increase frequency of watering |
| Soft spots on stems and leaves, particularly at growing tips, translucent dark green water-logged lesions | Water too cold; frost | Use tepid water; raise temperature or bring plant indoors before nighttime temperatures get too cool |
| Loss of root mass | Potting medium too wet; underwatering; improper pH; winter dormancy | Repot and adjust watering frequency; keep soil moister; adjust pH; normal phenomenon during dormancy |