What is wrong with my pineapple sage?

about a year ago I was given a pineapple sage plant. I cloned this plant several times and moved them all out side into gallon size pots, in an area where they get a majority of shade but a good amount of sun. one by one the leaves of some of the plants (not all) have started yellowing, especially around the veins. Next they wilt a little and the leaves start dying on the edges and then completely until hole sides of the plant are dead. we have fertilized these plants with fertilizer that is guaranteed not to burn. I have no idea whats going on, please if you have any idea what's wrong let me know :)

What is wrong with my pineapple sage?
Pineapple sages are great Hummingbird plants - I hope you will be happy with them. I think they like full sun so move one into a sunnier spot for a few days and see if that helps. Also I think they need a lot of misting, especially if kept outside during the summer months. Try to mist 2X daily to keep the foliage cool.
Reply:It sounds like a lack of water (yellowing). It could also be that they need more sun. I live in central Texas and have one in my perennial garden (that I planted 2 years ago), it receives full sun and is doing great.
Reply:From research I have done for the same problem, I found out that some sages can die after a coule years...like an annual, but 2-3 years instead of one...ours almost completely died off, but then just started to come back the next season....don't over water it, but don't forget about it even if it dies mostly back....Some sages don't have this problem at all, but I guess some do...Good Luck!!