Fertilizant vegetative phase

Outdoor in pots ? Or outdoor in the ground ? In pots it’s every 2 watering , in ground you can feed more often as the roots zone will be way larger than in pot

It depends on whether your soil has amendments in it already, or you are going to use it, as is. IF you have a good, healthy soil, I would hold off for a few weeks before feeding veg nutes. IMO, If your soil is like clay, sand, rocky and just plain miserable, you can start feeding veg nutes as soon as the plant has reached 3 or 4 internodes. Sooner, if you see right away, that your plant needs nutrients. For frequency, again, that depends on soil quality. maybe once per week, at 50% strength, until you see what your plant needs. Good Luck.