Dr. Leonard Perry, Extension professor emeritus at the University of Vermont and author of Caring for Your Poinsettia Year-Round, developed an easy-to-follow poinsettia care calendar based on the holidays of the year. © Outside, it will need to grow in a semi-shady location. Place a saucer under the pot, and drain the saucer if water starts to collect in it. Any below freezing temperatures could kill the tropical plant. Never expose them to temperatures below 55 degrees Fahrenheit. A: Yes, you can plant the holiday houseplants outdoors, preferably in a sunny or partially sunny, protected area with a well-draining soil. Starting on or near Sept. 21, give the plant 16 hours of uninterrupted darkness (put the plant in a closet, basement or under a box) and 8 hours of bright light every day. Continue watering as needed January through March. Never allow poinsettias to get so dry that they wilt. Rotate the plant daily to give all sides even light. Can Poinsettias Grow Outside – Caring For Outdoor Poinsettia Plants. Move indoors to a spot that gets at least six hours of direct light daily, preferably more. Never allow poinsettia pots to sit in excess water. Take 300mm stem cuttings, dip the ends in water and insert into potting mix. This is to encourage a stout, well-branched plant. July: In early July, pinch back each stem by about one inch. Any below freezing temperatures could kill the tropical plant. You will also find unusually colored poinsettias such as blue or purple in garden centers. Poinsettias are tropical plants. Once all of the leaves have died back, prune the bushes back to two buds and keep it … While most people plant poinsettias outdoors, you can also grow them indoors, which is ideal for those who are living in cold climate. Poinsettias are named for Joel Robert Poinsett (1779-1851), a noted statesman and dedicated amateur botanist who first brought poinsettias to the United States from Mexico in 1825 while serving as ambassador. The sticky white sap can cause a skin rash, so gloves are recommended when working with these plants. Water your poinsettia thoroughly after transplanting. By Teo Spengler. Poinsettias grow best in well-lit areas, but direct sun or hot lights can dry out the plants. Continue keeping the plant in a bright, sunny window. In the wild, they grow as … Finding good growing conditions is the secret. For more information about poinsettia plants outdoors, click here. Plant guide: Poinsettias - how to grow and care for. The day time temperatures in excess of 21 degrees C (70 degrees F) shorten the lifespan of Poinsettias. As flowering shrubs, poinsettias can reach a height of up to ten feet. Fertilizing during the holidays could affect the quality of the plant. The actual flowers are small and yellow in color. Nevertheless, the poinsettia … During the shorter, cooler days from late October until Christmas, humidity levels in the greenhouse are often high and poinsettias use less water from the growing medium, causing it to dry out more slowly. Poinsettias have been a holiday tradition in this country for many years. Answer: Some gardeners have real success keeping poinsettias for another year, but others find them a challenge. In Australia, the pots of poinsettia we buy at Christmas are actually forced to flower at this time. They are most commonly used for decorating during the winter holidays, but are also attractive as green plants throughout the year. The poinsettia is a tropical plant native to Mexico. Feed your poinsettia every 3-4 weeks to keep plant healthy and provide the necessary nutrients for new growth. Average frost season for Auckland: 13th June to 6th August. The plant needs specific conditions in order to make it turn the deep red and green it is famous for around the Christmas holidays. Thanks for your help! Protect the plants from both cold and hot drafts from outside doors, heat registers or appliances. Beware: they don’t like cold weather or drafts. If your poinsettia is growing in a pot when you get it, keep it indoors in a sunny room where the temperatures range from 65 to 80 degrees F. during the day, and no lower than about 60 degrees F. at night. Root Growth: Poinsettias need a well-developed root system before growing cold. Some tips on growing Poinsettias: Poinsettias are tropical plants, and like at least 8 hours/day of direct light and temperatures above 65 degrees. I have recently put a potted poinsettia plant outside and would like some tips on growing it outside here in San Diego. 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