When Does Flowering Start in Oregon?


When Does Flowering Start in Oregon?

Now that the summer solstice has passed and the days are getting shorter, many newer outdoor growers are wondering when their short-day photoperiod plants will begin flowering in Oregon. 

In Oregon you can expect your short day plants to begin flowering around late-July to early-August. Of course this can vary by plant type and specific variety but is a good rule of thumb. If you're bringing plants from indoors to outdoors, keep in mind that the sudden light change may trigger flowering as well. Around July 4th we are at about 15 1/2 hours of daylight. If you don't want to your plants to begin flowering yet, or start then stop, then start again, slowly back your lighting down before suddenly bringing them outdoors.


What are short-day photoperiod plants?

Short-day photoperiod plants are plants that begin to bloom or flower as the days get shorter. Some plants that are short-day photoperiod plants are: 

  • Cotton
  • Rice
  • Cannabis
  • Sorghum
  • Mung bean
  • Soybeans

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  • Charles Davis
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