Hey! welcome!
The plants you chose both benefit from liquid fertilizer AND root tabs! Don't forget about them!
At the start, I too thought that Easy Green might be the only thing I need.
After putting in root tabs about once a month, I started to notice the growth in all my plants that were planted in gravel explode. Literally. Dwarf sag covered the entire front of my tank and my Amazon Sword was growing a new leaf every week!
All I can say is, look into it, give it a try! Very beneficial to the tank, especially if not much mulm/nutrients have been built up in the gravel yet.