How Long Before It Needs Nutrients ??

i ave a white widow that is about a 5 weeks old grew from seed, how long is it before it needs nutrients ??

I would start now, remember add a very short amount the first time, you can always add but not take out

What is it planted in (soil, hydro)? Indoors, outdoors? Is it showing any obvious signs of deficiency? What nutes are you considering (chem or organic)? Just asking this as it would be helpful in making any recommendation.

Generally, I would think that it is old enough to start taking nutes. It is hard to tell without more info or a pic. Start slowly no matter what. For indoors I would say once a week. No more than 1/2 strength (I would go 1/4) of recommended dosages and work up from there. The reason I start slow is to be able to watch for burn starting. It usually takes a couple of days for that to show up.

I err on the side of caution, but it works for me.

here it is,, grown in bio bizz sil with coco pebbles at the top and bottom

Looking at the picture, I would say it is developed enough for nutes. The growth is healthy and if you stay light on the dosage, you can work out what your plant loves the most! Almost every nute bottle I have ever seen says to cut the dosage in half for indoor. I usually cut that in half as well to start. What nutes are you considering?