Scaevola is a very heat and drought tolerant plant that is native to Australia. I think maybe you have been too generous with the watering and root/stem rot has occurred. Let it dry out a bit and maybe it will recover. Only water when it's dry; stick your finger down into the pot to check the moisture. Good luck.

Thank you, Debbie. My neighbor who works at a nursery told me to water it 2x a day so I stepped up my watering schedule. Maybe too much watering is what did it in. I still didn't discard it because I still see green stems but I don't know whether it will come back...

Opossum, never trust a suggestion to water according to a schedule. Watering needs to be done according to how much moisture is in the potting mix, and that's detected by poking and prodding with your fingers.

Pots made with Tapla's potting soil recipe are mostly pine bark fines, and when the temps are in the high 90's the pots need watering daily.

Regardless what the potting mix, what the plant, or what the weather, I would still trust my finger to tell me what's going on under the surface. It's very likely that a well draining medium would need watering daily, and my finger will confirm that.

Martha