Candy buckets in Disney Dreamlight Valley spawn primarily in the Plaza biome and typically appear once or twice per day for each color (red/orange, purple, and green) during the Halloween event that runs from late October until October 31. Each bucket may contain one to three pieces of candy. The buckets spawn randomly in the Plaza and players usually find two of each color daily from around October 15 to 30. On Halloween itself (October 31), the spawn rate increases significantly, with multiple candy buckets of each type appearing throughout the day, providing players with more opportunities to collect candy. This spawning behavior suggests a daily refresh or respawn of candy buckets, with a maximum of about 4-6 buckets total per day, but a higher frequency specifically on Halloween.

In summary, candy buckets spawn approximately once or twice per day for each color in the Plaza during the event period, with increased frequency on Halloween, making those days the best time to gather candy efficiently.