Agree, my amazon sword had that same leaf and died off and after new leaves grow it look way different now less stem and broad leaves@musserump09 Flourish has no macros. For a balanced all in one check out thrive by nilocg, or add seachem nitrogen, potassium, and phosphorus.
Do you have root tabs in with them? I prefer two tabs per sword.
Also, just because they were submerged at the lfs, doesn’t mean they were grown that way. Possible new arrivals, etc.
Most Lfs plants come from a nursery and those nurseries grow there plants immersed as well as being co2 injected. Most swords from the store have rounded teardrop shaped leaves, and will die off, before being replaced by long pointy ones. A lot of the reason why the stores red plants are so red, such as scarlet temple, is because of the nurseries that have co2, high light, or are immersed. The plants at the store look good because that's where they just came from. They'll all most likely melt away, except for the few exceptions such as anubias and various rhizomed plants. I stay away from the big box stores, and go with smaller locally owned stores that sell plants from local people with fully established tanks. It's hard for a plant to go from a high co2 environment being immersed, to a tank that is low co2 and submerged.It was submerged when in the LFS