I would appreciate some advice here. This is my second year, last year was a large learning curve. My concern is that I will be leaving home and having a caregiver freind come and stay with my mom. She has no problem in watering my lovely ladies, my concern is it okay to use city water for 3 waterings. Currently I am using rain water, 20 gal smart pots, they are taking about 2 gallons every other day. I add nutes, growing in fox farm ocean. I want to make this easy for her, will city water harm the plants for those 3 waterings. I am in Southern Oregon and we are just know heating up and I grow in a greenhouse. Please be gentle, I'm fragile