Changing Medium, when changing container size?

Ok, my question is that I have 3 plants that are about 18 inches tall still in veg in 1 gallon pots, I want to move them to 4 gallons. My current medium for them is Promix BX w/extra perlite added. I have been giving it organic nutes once a week for over a month. Now when I transplant them to the bigger container, I was going to do a 2:1 ratio of Promix Bx and Ocean Forest Farm soil. Veg for another 10 days then flower. Now is there any benefit to adding the Ocean Forest Soil at this point? Will it cause me issues ? Should I just stick to the Promix BX? What are everyones thoughts?

Can anyone tell me there input on my issue?

no one can chime in??

i would just stick with the promix the only thing that ocean forrest will do for u is give ur soil food

The Ocean Forest will give your soil a lot of nutrients, so IMO, I would go ahead and mix the OF in with the Promix. I only use OF on my grows and couldn't recommend it any higher.

thanks for the replys