Q.Growing English ivy indoors
I was given a container with four to five ivy plants—have had them for almost two years. They have been healthy until this May when three plants suddenly began to yellow and dry up. i have never overwatered but added some when the soil felt dry. I have not fertilized the plants to that point. In May as I said they began to die off. I moved them to a brighter area since they were in a shaded window inside. I removed the dead plants (all are about 5 inches tall) and repotted to another container with the same soil. I fed them with a nitrogen-rich fertilizer and placed the pot back in the bright window (5-6 hours of sun daily). It seems to have no pests and leaves were clean. It has now been two weeks and it appears one of the plants is beginning to yellow.
Can you suggest the direction I should go with the container of ivy now. (I have Miracle=Gro fertilizer or fish emulsion available as well as new potting soil.) thank you

Indoor Ivy are very susceptible to Spider Mites; especially during the dry winter months. You can mist the plants during these dry periods. I have even used Neem Oil a regular bases during this time to keep these pests from taking over and killing Ivy.
Neem Oil is organic and safe for people and pets.
https://www.gardeningknowhow.com/houseplants/ivy/indoor-ivy-care.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm