How many hydrangeas should I plant in my garden to achieve that lush, vibrant landscape I’ve always envisioned? Is there an ideal number that balances aesthetics with the practical considerations of space and plant health? Given the diverse varieties of hydrangeas, should I contemplate different spacing for mophead versus panicle types? What factors should I consider when determining the quantity—such as the size of my garden, the existing sunlight conditions, and the soil quality? Could it be advantageous to integrate a mixture of sizes and colors to create visual interest, or might that lead to overcrowding and competition for nutrients? How do seasonal variations influence the ideal quantity, and should I consider their growth patterns over time? Lastly, is there an optimal spacing rule I should adhere to in order to ensure each hydrangea flourishes, allowing for adequate air circulation and sunlight penetration?