First of all, check to make sure your plant isn’t just sleeping. Some plants need a dormancy period to hibernate. This happens most often with plants with bulbs like amaryllis (which is usually sold around Christmas) or purple shamrock. If your plant is dormant, move it to a dim corner and lay off watering until you notice new growth appearing. That’s when you can put it back in its usual spot and resume watering. But if you’re pretty sure dormancy isn’t want’s happening, check its vitals. “Pull it up and check to see if the roots are healthy,” advises Summer Rayne Oakes. Oakes is the host and producer of YouTube's Plant One On Me and IGTV's 365 Days of Plants and author of How to Make a Plant Love You. “Signs of health include chubby or flexible roots that are typically white or green. If the roots are mushy, brown, or super brittle then it probably means your plant has passed into Plant Heaven, likely due to root rot (from overwatering) or neglect, and should be composted,” she says. “But hey, if you compost it, at least it will return back to the soil and hopefully will eventually serve as a foundation to grow more plants!” Please accept our sincere condolences for your loss.