The leaves and stems soften quickly when water is scarce. In spring and summer, water when the soil surface becomes dry to the touch. Never let the soil dry out. Check daily for subsoil conditions, especially during hot and dry periods. There should not be any water left standing in the saucer, as the roots of Fittonia are susceptible to both too much and too little water. Fertilize with a balanced fertilizer for houseplants, or an all-purpose fertilizer such as 20-20-20, every two months during the growing season (March to October).