Answer: In the most mild of climates, it is possible to grow poinsettias in the ground. But, if the temperatures dip below 40F, the plants will be damaged. Here's one way to keep poinsettias from one year to the next, starting from shortly after the holidays.
Prune the stems back to stubs about 4 inches high and replant in well-draining soil. If you want your plants to bloom again, repot them rather than plant directly in the ground. Sink the pots into the ground in a very sunny location until sometime in September or early October, when you will place it in TOTAL darkness for 13-14 hours every night. This is REALLY important. If you have a room that is not lived in at all, it can stay there. But if you put
lights on at any time in that room...it won't work! If that's the case, it must be moved from darkness (such as a dark closet) into light every day...faithfully.
When the bracts have colored again...bring them out and start bragging!
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