Poinsettia Flower Initiation Dates
The earliest number of days to flowering was shown by poinsettia exposed to 8 hours 28 34.
Poinsettia flower initiation dates. Alternatively a tank mix of 1000 2000 ppm daminozide and 500 1000 ppm chlormequat can be applied before or after flower initiation. 0 25 2 ppm prior to flower initiation. Flowers mature in 60 to 85 days depending on varieties temperature and light intensity.
Poinsettia bud initiation dates study of bud initiation dates enables growers to produce and time better poinsettia flowers a. The day length reaches the critical 11 hours 50 minutes a bit earlier in the north. Dark periods of 11 hours 45 minutes will initiate flowers in most poinsettia varieties but initiation is most rapid at 14 14 5 hours of darkness.
Normal flower initiation left an d delayed flower initiation of prestige early red right adt 65f in october. On the other hand poinsettia applied with 50 ppm paclobutrazol b flower followed by plants treated with water only b with a mean of 28 39 and 29 42 re spectively. Because flower initiation depends upon the length of the dark period your poinsettia must be kept completely dark from 5 p m.
The key date for flower bud initiation. This can seriously affect quality since once pollen sheds in an individual flower in the cluster the bract under that flower almost completely stops enlarging and the result can be very small bracts and poor quality plants. Proactive ipm practices should be utilized.
In order to have poinsettias ready to sell by thanksgiving commercial poinsettia growers need to. My first reaction is that this is a. Sciaroni the poinsettia grown especially for the christmas holiday season is valued at approximately 250 000 annually.
Dark periods longer than 12 hours are necessary for flower set. It is the third ranking pot plant crop in. This is a reasonable question because poinsettias are short day sd response plants.
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