Quick question on how much fertilizer i should use on my plants and what a good starting point to give them ferts is.

My plants are about 25 days old give or take a few days so curious if i should start ferts now or wait. I have two types of fertilizers that i found burried in my garage.

Root & Grow Plant starter 3-10-3

and

Ra-Pid Grow 20-20-20

Wich of these would be the best for the plants and how much do i use.
Antiokus Reviewed by Antiokus on . Ferts Quick question on how much fertilizer i should use on my plants and what a good starting point to give them ferts is. My plants are about 25 days old give or take a few days so curious if i should start ferts now or wait. I have two types of fertilizers that i found burried in my garage. Root & Grow Plant starter 3-10-3 and Ra-Pid Grow 20-20-20 Rating: 5