It could be that either; the area your growing them in is too cold or maybe it's getting a draft on it. Sometimes if the plant is getting to much light or there might be a relection off the tray your plant is sitting in will cause curling of leaves.
Chat with our AI personalities
The little hairs are for it's protection against insects that will harm the leaves and plant. African violets leaves are full of water and they are very delicate.
Cold water kills the leaves of African Violets. Where the water touches, it causes dead spots on the leaves. Room temperature water will not cause these dead spots.
African violets benefit from having their leaves rinsed off with tepid water or the same fertilizer/water mixture, when I water my African violets they get a total shower every time I water them (the fertilizer helps the leaves stay green and helps prevent powdery mildew. Make sure you blot off the excess water on the leaves and from the crown area to avoid water marks and to prevent crown rot. Also, if you are using artificial lighting to grow your African violets make sure you leave the lights off until leaves and especially the centers are dry.
No, African violets are not endangered, many hobbyists grow them and show them. However, most of the African violets grown by hobbyists are hybrids. On another hand, some subspecies of the Saintpaulia species (the African violets as they were discovered in the nature) are endangered.
No, African violets are not poisonous at all. Cats might get a tummy ache from eatting too many though.
No, direct sunshine on your African violet will cause the leaves to have burned spots on them. This should be avoided. Place violets in good bright indirect light such as a North window or artificial lighting such as flourescrnt bulbs.