When should I plant peonies to ensure they flourish and reach their full potential? Is there a particular season that is deemed most advantageous for such an endeavor? Considering the climatic variances across different regions, do you think that spring or fall would be more suitable for planting these exquisite flowers? Might the soil temperature and moisture levels also play a significant role in determining the optimal planting time for peonies? Furthermore, are there specific cultivars that may require distinct planting timelines? How can one ascertain the right moment, especially when faced with the unpredictable whims of nature? Should I be mindful of the last frost dates in my area, or is it wise to heed the lunar calendar for guidance? Ultimately, what factors should I prioritize when deciding on the ideal timeframe to plant peonies, ensuring their robust growth and vibrant blooming in the seasons to come?