A good book on growing flowers from bulbs will provide detailed instructions. It depends on the type of plant and your purpose. It is a good idea to consult a book such as Ortho s All About Pruning or the Sunset Western Garden Book regarding specific plants. Those are signs of spider mites. Stippling results when pigment disappears after mites suck cell contents from the leaves.
Cultural practices can have a significant impact on the control of spider mites.
Mite populations are reduced by frequent washing of foliage with water. Isolate infected plants. Be careful when bringing new plants into the home. Apply a nitrogen fertilizer and irrigate thoroughly to encourage rapid growth. Most infected leaves are removed by mowing.