You won't need "bloom boosters" if you just give the plant what it wants from the start. I've read great things about the mega crop Dynamo suggested for soil. When I was growing in soil I was using the fox farm nutes. I got a great harvest, but did a lot of mixing and playing around when it came to feeding time.
I havn't ran the GH trio in soil, but have used it over the years in hydro with good results. I've tried some different boosters and things over the last 13 years and never saw a difference worth the cost. The absolute best results I've ever seen from a nutrient have been using
https://www.envybrand.com/index.php/envy-hydroponics . This is a hydro nute so I don't know for sure how it would work in soil, but I bet you could call the company and ask. Its an AWESOME nutrient. It has exactly what the plants need, is very PH stable once you set it. You use the same nutes through the whole life of the plant, and it works great.
There are totally some growers that swear by all 15 of the nute bottles they have on their shelf.
There are also tons of growers that have come to appreciate the KISS approach, and just try to provide the plants with what they actually need.