mr. dj,

well.. there are some important factors we need to know in order to answer your question..

1. how old are your plants?
2. are they vegging or flowering?
3. what size are your pots?
4. what is the temp in your room?
5. what kind of lights are you using...?
6. what medium are you growing in? soil/perlite?

you can thoroughly water a 4 week old plant in a 5 gallon container with 1.5 gallons of water... let the pot sit in the excess water (at least 1 inch)...

under a 400 watt bulb at 70-75 degree room temp

in a 90/10 % soil/perlite mixture
for 7-10 days... and the plant will be fine

iloveyou