Plant food/ nutes - When to start giving?

My little one is now 3 and a half weeks old and coming along well.
I have been giving some 5-0-0 about every 3rd water (so around once every 8 days)
She is in a small pot and the moment and I plan to repot when I start to see some roots.

I have some 6-6-6 plant food/ nutrients I bought some time back and,,,,

Will it be good to use?
If it is good, when should I start giving my baby the nutrients?

It really depends on what type of medium you are growing in, some soils have time release nutrients in them already and if you add to them the plants can have toxicity issues, short of that just watch what the plants tell you with their color and growth, but most start feeding when first true leaves are present, I like to wait till node 3

Bbcchance said:

It really depends on what type of medium you are growing in, some soils have time release nutrients in them already and if you add to them the plants can have toxicity issues, short of that just watch what the plants tell you with their color and growth, but most start feeding when first true leaves are present, I like to wait till node 3

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It really is all about the medium when it comes to what and how much nutes. I grow in FFHF soil which has enough to last all the way from seedling to 3 weeks after transplant. If you are using MG you should not HAVE to add anything ever. If you are using coco, pro-mix or some other inert medium, you have to add it all.

Good luck and Great Growing

I wont repeat what others have said because they have given you a fair idea, but I will say perhaps you should take the time too visit a hydroponics shop in your area and ask for a nutrient feed for whatever style of medium your using rather than just using some basic stuff your not even sure is any good for your applications.
About $100 and you can expect a decent brand of nutrient and all the solution you'll need for your first grow (as long as you don't have 30 plants)