Transplanting

Hello all so I have a few master kush currently in soil/perlight they are 3 weeks from seed and I will be transplanting what soil should or could I use but with minimal nutrients only.cause they will be going into flower in about a month . Also I am feeding gh 3 part flora series micro/grow/and bloom
I dont want to use a soil with tons of nutes due to the fact that I'm feeding and I think to much nitrogen will be fed especially once start flowering

This is the soil I currently use, I have used it for 2 grows now and I am quite happy with it! I have not had any issues yet with this soil and I hope this helps! I think their may be a forum on here that entails more about the soil, I will try to find it after writing this!