take a rough guess...water question

i was wandering how many bottles of water it would take to fullfill the water requirements for a plant in a 5 gallon bucket. i water my plants using water bottles carried in a book bag, but im not sure how many it take to sufficiently water the plants when they are dry. considering that the plants need water (when the first 3 or so inches are dry), how many little 17 ounce water bottles would take to correctly water the plant. they are in basic potting soil mix. i have been using about two bottles per bucket when they need a drink, but i wanted to hear other peoples thoughts on how many would be needed, just a rough guess. i dont want to be underwatering, or visa versa, when i should be giving them more, u know what i mean. i know there are other variables, but does 2 seem like enough for a complete, deep watering so that the roots will follow the water down and grow strong....thanks alot

 

2 liter jugs my friend use them

 

10btw

 

5

 

A containerized 5' plant in full veg can drink up to 1/3 gal. water/day during a dry summer.

Make sure you have adequate drainage.