I would say 4 weeks. I’m using the same soil and accidentally burnt one feeding after 3 weeks. 4th week she took the nutes fine. Start with low dosage though and work up
I would feed her water for the first 4 weeks. She should flip to flower around that time. Then start flower nutes. Flush every Sunday. Last 6-9 days of life just water.
Hello
Ocean farm usually has enough nutrients for the first few weeks. So id start bringing in 1/4 dose this next week and then slowly increase up to 1/2 dose. If you see any pale leaves then increase regardless of age.