Poinsettia Flower Buds. 01052015 Keep the poinsettia in an area where it will receive bright indirect sunlight. Flower buds do not develop but break apical dominance and cause the plant to 2 branch see photo 1.
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Not all commercial varieties have the same critical day length but a rule of thumb has been that when night length reaches 11 hours and 40 minutes or more poinsettia flowers will. 27082014 If you live in the northern hemisphere the critical day length signal for most poinsettia varieties to set bud or initiate their flowers occurs some time during the month of September. Occasionally greenhouse operators will have trouble timing the poinsettia for the Christmas season because of dark or cool weather.
Beginning in late September or early October make certain.
Flower buds will begin to develop in October. Poinsettias are a plant that has big red showy blooms from December to January. Magnesium DeficiencyMagnesium deficiency is a common problem with poinsettias. Delay or disruption of flowering will occur if fall temperatures are too warm or too cold or if the required dark period is interrupted.
