Please Help!

hi all, im a newbie------
i wanna know that 1)how many times should i water the plant a day or how many days should i water the plant once. i germinatated them and they are about 4-7 inches tall now should i be 2)adding nutrients to the water already. 3)also im putting it under a MH light which is about 1 foot on top of the plant, am i doing it correctly.

many thanks in advance

Yes put them under the MH and ALLWAYS check ur temps and RH...
Put the plant in a large enought pot (1 - 3 gallons), and water with the same amount of water as u have in pot volume ALLWAYS check water pH...let the 1st 2" of the soil dry out and water again
If u´re not using a soilless mix (no nutrients present in the grow medium) u should only need to add nutes at about week 3-4