Lemons are more cold-sensitive than all other citrus trees. Due to this cold sensitivity, lemon trees should be planted near the south side of the home. Lemon trees also require full sunlight for adequate growth. While lemon trees can tolerate a range of soils, including poor soil, most prefer well-drained, slightly acidic soil. Lemon trees should be set slightly higher than ground. Therefore, dig a hole somewhat shallower than the length of the root ball.