Hiya @Countryboyjvd1971 & @Laurap ... I do use the GH 3 part...it's affordable, has all the nutrients your plants need for a simple grow and the 3 parts are easily modified for increasing base nutes...
Instead of following the basic formula of equal parts Grow, Micro and Bloom (1-1-1), there is something called the Lucas formula stating there is enough Nitrogen in the Micro and Bloom to not need to use Grow.
That modification has been further changed in the above link to using 1-1-1 during vegetation, then starting Flower with 0.25-1-2 and changing in week 4-5 of Flower to 0-1-2.
If you have a ppm meter, aim for 400-500 or so for a first feeding...quarter strength to half strength, see how they do.
@Tonyb is right, Liquid Karma is great after transplanting to relieve stress...I have used superthrive for transplants, too.