13-13-13 is a 1-1-1 ratio which is the same as a 20-20-20 or a 7-7-7. That's an all purpose ratio that should work just fine start to finish. DynaGro and Jacks Classic both carry 1-1-1 ratios and even the GH 3-part can be tweaked for a final NPK ratio of 1-1-1.
Jacks however looks like it's intended for amended soils as it's lacking the secondary macro nutes (magnesium, calcium and sulfur).
