peters 20 20 20 fert

A friend gave me some peters 20 20 20 ,I been using it on my young clones.They are taking off very fast on flor lights at night and putting them outside for some great amounts of hawaii sun in the day.They are about 2 feet tall and shooting wide. how long do I use it for and how much for young plants,right now Ive been using it but plan to switch to fox farm big bloom and beastie bloomz next would this be a safe switch if flushed right?I want to here from experienced growers who have used any of these.,or had any sucess using chemical ferts and switching to organic.I perfer a earthy skunky taste.I dont like a harsh fert taste and want to get advice on this.aloha

After a few weeks I stoped using the peters 20 20 20 ferts becuz I overdid it,not impressed with the chem ferts.Now I flush and wait till my plants recover.back to organics!