How often should I water my marigolds to ensure they flourish and exhibit vibrant blooms throughout the growing season? Given the delicate balance between soil moisture and root health, is there a specific frequency that is generally recommended by horticultural experts? Are there variations in watering needs based on climate, soil type, or even the size of the pot for container-grown marigolds? Furthermore, should one consider the time of day for watering? Early morning, perhaps, to minimize evaporation and allow the plants to absorb moisture before the afternoon heat? Also, how can one ascertain if marigolds are receiving the correct amount of water without over-saturating their roots? Might it be prudent to conduct a soil moisture test periodically? What signs should be observed to indicate both under-watering and over-watering? Ultimately, how can one optimize their watering regimen to support the robust growth of these enchanting flowers?