When should I plant dahlia tubers to ensure optimal growth and flourishing blooms? Is there a specific time frame that aligns with regional climate variations, or could it potentially depend on the local frost dates? As I consider the best practices for cultivating these breathtaking flowers, should I be checking soil temperatures and ensuring they reach an adequate warmth to facilitate germination? Should I plant them in the spring, or is there a case for an earlier planting strategy in temperate regions? Additionally, how do factors such as sun exposure and soil drainage influence the timing of planting? Can the health of the tubers themselves dictate whether they should be planted earlier or later in the season? Ultimately, what are the essential indicators I should be looking for to determine the perfect moment for planting dahlia tubers for a thriving garden display? Are there specific signs in nature that suggest the ideal planting time?