Hyacinth flowers naturally lean towards the light so the reason your flowers are tilted is that they are reaching to get the most light. When plants do this, the best thing is to turn their pots a little each day. Keep in mind that potted hyacinths are sold as temporary indoor plants for their color and fragrance. They do not last long, and, if you buy them in full flower, they will die back naturally. The key to keeping hyacinths going is to buy them when they are very short with small flower stalks. And, to keep the plants in a cool location. However, even with ideal care, you can expect to have the flowers for about a week to 10 days. After that, it's best to toss the plant on the compost pile. These are not potted plants designed to last like houseplants.