Well I'm no expert by any means lol. This is my first planted tank... I'm seeing what works and what doesn't. I'm using root tabs and liquid supplements, a full spectrum LED, and I cut all the emersed leaves off after planting which helped...
For me, my Java Ferns don't grow, get brown spots (not the spores, just brown spots). Even with fertilization they don't do that well...
I guess everyone's water is different and therefore plants react differently in different parameters. So some plants just don't do well for others...
Out of curiosity, what is the PH for your tanks?