Daisies do not require constant watering and should only be watered when the soil is slightly dry. The SFGate Home Guides suggests that daisies need one to two inches of water every week during warm seasons and one to two inches of water every other week during cooler seasons.
Daisies thrive when they are watered in the morning. Garden Guides suggests that watering daisies earlier in the day allows the water to seep down to the roots instead of simply evaporating in the heat. Daisies with deeply watered roots tend to grow better and are more tolerant of dry conditions.