Lemon trees bud at different times of the year depending on the specific variety and climatic conditions. Generally, lemon trees tend to bud in the spring season when the temperature starts to warm up. This is usually around the months of March to May. During this time, the lemon tree produces new growth in the form of buds and leaves. It is important to note that lemon trees require a certain amount of warmth and sunlight to initiate budding. However, the exact timing of bud formation can vary based on factors such as geographic location, weather patterns, and tree health. It is recommended to monitor the tree closely and provide appropriate care to ensure optimal bud formation and growth.