But if your poinsettialeaves are fading or turningyellow, dehydration may be the reason. "Drying out can be a cause of yellowing bracts," says Justin Hancock, horticulturalist, Costa Farms. Have your poinsettialeaves already started turningyellow? Perhaps its leaves are dropping, too?Light levels. If your poinsettialeaves are turningyellow, it's likely that they are kept in a spot that's too dark for them. Poinsettialeavesturningyellow can be caused by quite a few things, but the most likely source of the problem is water. So, are yellowleaves on poinsettia caused by too much or too little water? Unfortunately, it’s both. PoinsettiaLeavesTurningYellow. Year-round Poinsettia Maintenance.The PoinsettiaLeaves Are Curling & TurningYellow. When Should I Put My Poinsettia in the Dark? In this video you will see 5 reasons why your Poinsettialeaves are turningyellow and falling off one by one. Poinsettias need exposure to bright but indirect light each day. Place them on a windowsill that gets at least six hours of sunlight each day, but not direct sunlight, as this will fade the color of the bracts. Leaves that do not get enough sunlight may turnyellow and curl up. Leaves start dropping… turningyellow… or the plant suddenly looks sad just a few days later. Good news? Most poinsettia plant problems come from just a few simple mistakes. Poinsettialeaves may also curl up if the plant has root rot from getting too much water. The roots could rot if you leave the water in the saucer for more than a week. As the poinsettia’s roots rot, the lower leaves will turnyellow, and the leaves will curl, shrink and fall off. Light levels If your poinsettialeaves are turningyellow, it’s likely that they are kept in a spot that’s too dark for them. To keep poinsettias healthy in your winter home, Kate suggests giving them strong morning light and afternoon shade. You might notice the leavesturningyellow or dropping off, which signals that your watering schedule needs adjustment. Texas tap water often contains minerals that can build up in the soil over time, creating additional stress for your poinsettia.
