Geographical Regions
Flowering Response Information To help fine tune the varietal differences to night temperature and natural daylength, we have redefined the regions within our North American technical information.
North Areas with long natural daylengths in July and August, and cool night temperatures that cause flower initiation before the critical photoperiod is reached.
West Coast & California West Coast and High Altitude: Areas with night temperatures that are consistently at or below 60 °F during June, July, and August create flower bud initiation even under the longest days of the year. Flowering will occur 7, 8, 9, or 10 weeks after exposure to the cold night temperatures, depending on the variety and time of year. Flowering response is faster for September and October ship weeks than it is for July and August ship weeks.
Mid Areas with long natural daylengths in July and August, and warm night temperatures, where flower initiation is caused when critical photoperiod has been reached. This is unlike the North where initiation can occur earlier than by photoperiod alone.
South Areas with shorter natural daylengths in July and August, and warm night temperatures where flower initiation occurs with the critical photoperiod but is reached sooner than in the North and Mid regions. Some varieties that are sensitive to high night temperatures will not initiate exactly when the critical photoperiod is reached.
GARDEN MUMS
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