Why is Pineapple Sage dying?

[greenthumbomaha]

I indulged and bought two Pineapple Sage plants - One from Bonnie and one grown by a priovate Kansas Nursery. Planted each in a new pot (with drainage) and they both doubled in size and looked very healthy for about a month. The already dead one was in Black Gold, and the dying one in Miracle Grow.They are in morning sun on the porch. I gave the second one a dose of micronutrients but it still wants to decline.

What is happening? What can I do with a new plant (ahem yes I have another one from another nursery waiting for transplant) to keep it happier. I was hoping to overwinter in a sunny window.

- Lisa