Weight gain is a common symptom of Cushing's syndrome, a condition in which you are exposed to too much of the stress hormone cortisol, which in turn causes weight gain and other abnormalities.
Plant your poinsettia in an area that receives full sun most of the day. However, keep in mind that to put out flower buds, poinsettias require 14 hours of complete darkness each day for 6 to 8 weeks before flowering. Any interruption to this dark period can delay or prevent the plant from flowering. Watering & Soil. Keep the soil moderately moist at all times. Poinsettias grow best in moist, well drained, fertile soils. As long as the soil is well drained, they will grow satisfactorily in a wide range of soils, including sand, muck, marl and clay.
While keeping a poinsettia under controlled light conditions to change its color during fall, also keep the plant at a nighttime temperature between 60 and 70 degrees Fahrenheit. Water and fertilize the plant as normal. In eight to 10 weeks, the poinsettia's bracts should turn red.