I'd a maidenhair fern for 3 months that was thriving, very lush, seemed healthy. One morning nearly all its leaves shriveled. Most were still green, but several shriveled leaves near the root had turned yellowish-brown. This was a complete surprise. I'd watered it every other day making sure the soil remained moist. I'd fertilized it on schedule. I made sure it received appropriate lighting. Basically, I followed all the instructions given by my local garden center. Nevertheless, it apparently died overnight.
I've not been able to find a satisfying answer by googling; any thoughts as to what happened?