Kalanchoe blossfeldiana is a succulent perennial plant with blooms of orange, red, pink or yellow. It is a popular house plant and can be grown in containers, hanging baskets or dish gardens. It is easy to grow and usually available year round. Most problems with Kalanchoes are the result of high humidity or too much water.
Kalanchoes are susceptible to fungal diseases during periods of high humidity. Patches of dusty white or gray powder on the leaves and stems of Kalanchoes are symptoms of powdery mildew. Bortytis causes fuzzy brownish to gray patches of mold on plant parts. Remove and destroy infected plant parts.
Phytophthora crown rot affects the crown of the plant, causing it to deteriorate and die. The plant should be removed and destroyed.
Kalanchoes may have fewer flowers or none at all if the temperature is too high or low. The optimum temperature for Kalanchoes is between 65 and 80 degrees.
Edema refers to a condition where the plant cells absorb too much water and rupture. It is caused by a combination of low light, high humidity and wet potting soil. Corky or warty spots on the leaves are symptoms of edema. Do not overwater Kalanchoes during periods of high humidity and/or low light.
Pale, small, distorted new growth on Kalanchoes can be a sign of zinc deficiency. Apply a micro-nutrient fertilizer containing zinc, at the rate recommended by the manufacturer for Kalanchoes.
Kalanchoes are sensitive to chemicals, so the use of fungicides or pesticides is not recommended. Prune infected plant parts. Wash off insects with a watering can or hose, or remove by hand.