all depends on your intentions. With 2 buckets that means you can have 2 plants. I have seen 1 plant in a 5 gal under a 1000w hps produce over a pound. It is your conditions and genetics of the seed that will determine your outcome. Knowing the make-up of your soil is important. I only do hydro so someone else will have to chime in with soil. You need to get them into different containers. they are small so you can use small containers. Then you need to see which ones a fem and which are male. take the 2 biggest and best females from this and use those 2 for your large 5 gal buckets.
Do some searching. lots of info on here. good luck