I would water everyday or at least every other day if you can. When I grew I dug a 3 foot by 2 foot hole and filled it with soil and it dried up every three days (w/o rain). So if you used good soil then once every other day is fine. The more water you can give the plant without overwatering (nearly impossible outdoors) the better off you're plant will be. I would fertilize once it is around 4 inches tall and is growing steadily and only give it 1/4 strength for the first week then increase it as the plant responds.