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Grow Q&A: How Do I Know When To Flush My Pot Plants? – High Times

Grow Q&A: How Do I Know When To Flush My Pot Plants?

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  • For your White Widow, you should begin the 2 week flushing period at between 6-8 weeks based on your listing of it being ready to harvest at 8-10 weeks.
  • The flowering period begins from the moment you switch the light cycle to 12 hours on/12 hours off.


Dear Dan, My problem is not knowing when I am two weeks from harvest time, so that I can quit nutrients and flush with plain water. I have no reference to know how long it will take to go from clear trichomes, to milky white tirchomes. Or how long it takes to go from all white pistils to 25 percent red pistils? They say that for White Widow, the flowering period is 8 to 10 weeks.  Is that from 12 hours on/12 hours off, or from when the first actual flower appears? – Vincent

@HIGH_TIMES_Mag: Grow Q&A: How Do I Know When To Flush My Pot Plants?

Dear Dan, My problem is not knowing when I am two weeks from harvest time, so that I can quit nutrients and flush with plain water. I have no reference to know how long it will take to go from clear trichomes, to milky white tirchomes. Or how long it takes to go from all white pistils to 25 percent red pistils? They say that for White Widow, the flowering period is 8 to 10 weeks.  Is that from 12 hours on/12 hours off, or from when the first actual flower appears? – Vincent

The flowering period begins from the moment you switch the light cycle to 12 hours on/12 hours off. So, for your White Widow, you should begin the 2 week flushing period at between 6-8 weeks based on your listing of it being ready to harvest at 8-10 weeks. Even if you err on the side of caution and begin the flushing process a week too early, it’s not the end of the world. You’ll simply have a little bit longer of a flushing time and may experience fall colors on your leaves but the end result will be a cleaner burning product.

Buds are ripe when the trichomes go from mostly clear to mostly cloudy with some amber ones. Don’t worry about the colors of the pistils (or hairs) because they aren’t the most reliable way to determine when to harvest your plants.

Have a grow question? Ask away at deardanko@hightimes.com

Grow Q&A: How Do I Know When To Flush My Pot Plants? – High Times

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