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That one's a Bloom Booster formula. You're gonna be looking for something that will get you where you want to go. I would recommend getting some Calmag, along with a good over all veg formula. My first grow I started with Flora Nova Grow and Bloom. Two part series, one for grow and one for flower / bloom. You can mix the two at equal ratios for a transition feed. So, You'll want to get CalMag, Flora Nova Grow, & Flora Nova Bloom, plus you can wait to buy the bloom.Is that the right one? Can I use it out doors?
Jacks would be an additive (@ flower I think) but with 10-30-20 you may be a bit strong for starting seeds and clones.
You would need to water it down considerably and that's prolly why Emilya recommended it and how long it could last you. I've never used it before so you'd need to ask her the specifics.
Also, most formulas can be used inside or out. I've grown outdoors and in never had a problem with my nutes. BTW, you'll want to grab some bug spray with Neem Oil. I use Nuke'm ~ Flying Skull.
Keep us posted!