Poinsettia top growth should be close to final height and size, prior to growing cool. This temperature fluctuation is necessary for orchids to bloom. Poinsettias are sub-tropical plants and therefore wither if the night temperature falls below 10 degrees C (50 degrees F). Poinsettias benefit from plenty of direct daytime light to keep them from getting leggy. Do not put your plants too close to drafty windows or allow them to … Without a day-night fluctuation of 10-15 degrees Fahrenheit, the plants will grow plenty of healthy foliage but may stubbornly refuse to flower. If a sunny window isn’t available, choose as bright a spot as possible. Time to sneak the heating up a few notches. (3) A bit of temperature fluctuation is best. Temperature. The ideal temperature for poinsettias is 60-70 degrees. Avoid placing the poinsettia in drafty areas, such as near doors or under a window. Poinsettias look their best when they are kept the right temperature. The ideal nighttime temperature for flowering is between 55 and 60 degrees Fahrenheit, and temperatures warmer than 70 degrees can instead cause decay. It can be tricky to find that balance but do your best. What is the ideal temperature for poinsettias? “The more sudden that change in temperature can be, the bigger the effect,” John says. Poinsettias are tropical plants, so take care not to place it against the glass where it can suffer damage from the cold. Keeping plants too wet (watering too frequently) often results in the yellowing and loss of the poinsettia’s lower leaves. The plant should be moist rather than soggy. • Do not water a poinsettia on a regimen but only when it is dry. Poinsettia plants should be watered thoroughly, taking care not to drown them by ensuring adequate drainage is available. Let poinsettia plants dry out between watering. The ideal location for a poinsettia is in front of a warm, sunny, draft-free south, east, or west-facing window behind a veil of filtered sunlight. A night temperature of 60-62 degrees F is ideal for optimum growth, but temperatures as low as 55 degrees F will not harm your plant. The ideal temperature to keep these plants healthy and colors more vibrant is 65°F. Phalaenopsis spikes readily at a constant temperature in the proper range and a day and night temperature differential is not required (Table 4). The cooler finishing temperature will slow bract expansion allowing these crops to finish during the mid- to late-November market. Water whenever the surface feels dry to the touch. They will retain their blooms long after you have put away the Christmas decorations. Indoor temperatures should be maintained between 68 and 70 degrees Fahrenheit. They’re demanding plants. Contrary to what many think, poinsettias are not poisonous. This delays flowering and reduces color, and so should be avoided. Poinsettias will suffer damage if they are exposed to temperatures below 50 degrees F. Freezing temperatures will kill poinsettias. If temperatures fall below this range, the plant may drop its foliage or start to suffer from cold stress. I kept one going for about a year, treating it like a regular houseplant. The ideal temperature for poinsettias is around 65 to 72 degrees, but they can tolerate as low as 60 degrees. At Catoctin Mountain Growers in Maryland, Head Grower Julie Iferd uses “morning DIP” with poinsettias, although “it only works when outside temperatures cooperate. Monitor how much you are watering your poinsettia. The key here is to keep the plants’ environment as stable as possible so they won’t die prematurely. If you turn your heat back at night to around 60 degrees F, then your Poinsettias will be happier and last longer. Poinsettia care begins with proper light, water, and temperature conditions. 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