Space the plants 8 to 12 inches apart. Depending on the vigor and size of the lilies, keep the groups 3 to 5 feet apart. Small lily bulbs are planted 2 to 4 inches deep, and the larger bulbs about 4 to 6 inches deep. Soil Your garden soil for your lilies should drain well. Mix in lots of organic matter to the clay soil to have a raised area with improved drainage. Keeping Indoor Lilies Alive Indoor lilies are ideal for any home that have restricted spaces. This is because it gives the home a nature feel to it and will also help the people living inside the house to get fresher and cleaner air to breathe. For first timers, the best way to go about in keeping indoor lilies is to conduct a research about it. If the type bloom and grow in your space well, that s the time that you can buy additional potted lilies. To ensure that the lilies will grow well, consider the amount of sunlight it needs. If you are in a cold place, you need to place the plant in an area where it can be exposed in sunlight the whole time. Actually, the best assortment of varieties of the hardy lilies is available in the spring. Also, the bulbs of these hardy lilies are very easy to plant and cultivate. Planting a wide variety of them will enhance your perennials and shrubs. Or, maybe you can start a new landscape garden. Bloom time extension One exciting way to extend the bloom time of your flowers is to plant a group of Asiatic lilies with a group of Oriental lilies. You could even put some rocks or blocks on the edges of the bed to make it look more appealing. When to plant Experts would often recommend planting in the spring or in the fall, usually in the middle of September until October. Once you have bought the bulbs, it is important to immediately plant them once the ground is workable. They are not really particular with soil type. You just need a well-drained soil so the bulbs will not rot. Look for a garden section where the rain water does not accumulate. If there is non available, then you could raise the beds a bit. Put some mulch around the lilies to keep the soil moist. During winter, cover the bed with straw and evergreen.