Based on the search results provided, there is no relevant information about "Spring Preparation Packages" or "Early Bird Discounts" related to robotic lawn mowers. The search results primarily cover topics about birds, birdhouses, and educational materials, which are unrelated to the requested topic.
Since I cannot find any matching information in the search results, I'm unable to provide a response with a table about spring preparation packages or early bird discounts for robotic lawn mowers. Would you like me to search again with different keywords or provide general information about robotic lawn mower maintenance?