when to start giving nutes to seedlings

i have 2 seedlings started and im not sure when to start giving them nutes going to be in a homemade areo setup
started in rockwool
thanks everyone,
Joe

i usually try to be safe and start 1/4 strength at 2 weeksish. be sure to keep the ppm down too.

ive been 1/4 strength at 10 days and all is good.....

I started mine with one drop per gallon of superthrive as soon as the seed leaves were out. Three weeks later I tried 1/4 strength. One of the seedlings started showing some yellow edges so I flushed all the plants and cut the strength from 1/4 to 1/8. After that they were fine.

I think alot of it depends on the strain, and the type of nutes you're using. I think the plants will tell you if you pay attention to them.

so that superthriv is good solo?

I can tell you that I had a situation where I was sick and my seedlings missed a few waterings. One of them was quite wilted, the othe two were just looking dry. I watered all of them with the 1d/gal of superthrive came back the next day and they were fine.

No big deal right? Thing is It happened again. This time the one that didnt like not being watered the first time looked like it was gonnna die. Instead culling it, I decided to prop it up, and feed it with the 1d/gal superthrive. Long story short, that plant is doing as well as the rest.

Would It all have happend without the ST? I'll never know

thanks for the help guys