When should I plant onion sets to ensure optimal growth and bountiful harvests? As the seasons shift, understanding the nuances of planting time becomes crucial. Is there a specific window during which these vegetable gems flourish? Should I consider the climatic variations or perhaps the soil temperature? What are the indicators that signal the ideal moment to embed these little bulbs into the earth? Furthermore, does the geographical location or the local frost dates play a significant role in determining the planting timeframe? With the natural cycles of nature constantly at play, should one also take into account the lunar phases or traditional gardening calendars that some enthusiasts adhere to? How does one differentiate between early, mid, and late planting times for onion sets? Could the success of my entire gardening endeavor hinge on this seemingly simple decision? Where does knowledge of regional planting guidelines fit into this tapestry of considerations?