What the C guy said...water when they need it...most plants will tell you when they need water and if your over-watering

1)When the tops look dry and start to droop or fall over, the leaves may begin to curl and soil is dry...water,

2)If leaves begin to yellow, and may start to fall off (and your not into the last few weeks of flowering, and your nutrients are correct), and the soil is moist, stop watering so much!

3)A moisture meter can help "read"...and help you decide when and how much to water. Cheap insurance! <$10 @ any garden store!

4)A growing plants needs will change as it grows, as it gets bigger, it's needs for water and nutrients will change, so there really is no set answer to your question, sry, but no substitute for experience sometimes!

Learn to "read" your plants...they will tell you more than we can!