I just got finished battling Ich in 2 tanks, within a week of each other (it's a long story involving a mom trying to be helpful, but making things worse).
I used salt + temps (no lower than 86F), I didn't use nearly 1 tablespoon per gallon though, only 2:5. It didn't absolutely destroy my plants in my 55, but it did affect the growth and coloration. I've just recently stopped treatment (about 2 weeks on each tank, 1 week to cure all the spots + 1 to make sure it's dead) so I can't say how the plants will recover, but luckily my Roseafolia is getting it's red back. I would say a lot of it would depend on the individual plants. My Rosea as stated before lost almost all of it's red color and went to a green/tan. However my Anubias, and Java ferns didn't seem to mind. It stunted the growth of my Cabomba a bit, but it's rebounding ahead of the rest. However, in my 30 Gallon it pretty much obliterated my Java Lace, and Anachris. I went from having 20+ flowing stalks to only about 6 survivors and they are all kinda ragged. The Java Lace Fern was completely destroyed over night it seemed. The entire plant except 3 leaves were black/brown and mush.
However, using the method above (2 Tablespoons per 5 Gallons Ratio of Salt to Water, and 86 - 88 Temps) I never lost a single tetra (neon, black neon, rummynose, and von rio), rainbow (ornates, boeseman, and turquoise), danio, cory, red tailed shark, bristlenose, ghost shrimp, or the fish that started it all: brilliant rasbora.
I think Angel has successfully treated using QuickCure with no detrimental effects to her plants. I'll probably try it again next time.
In any event, whatever treatment you use, best of luck to you. Ich happens.