I´m spanish, what flush means here?

thanks in advance

means you are removing left over nutrients and chemicals from the soil/coco/medium

simply put: feed it with plain water for the week before harvest

flushing gives a smoother taste, apparently

mucho agua!

If you have an Aerogarden it could also mean rinsing out the reservoir throughly during a weekly water change out. Many people refer to this a "flushing the res". But tip top is correct.....it's mainly used to refer to just using plain water with no nutes before harvest. This endures a smoother smoke with no chemical aftertaste.

if using chemical ferts i like to flush (which mean straight water to remove any left over chemicals from soil) for about 2 or 3 times which is equal to about 14-21 days to make sure all chemicals are gone.... but i have recently switched to 100% organic nutes and you only have to flush them once i woule recommend anything 100% organic

tip top toker said:

means you are removing left over nutrients and chemicals from the soil/coco/medium

simply put: feed it with plain water for the week before harvest

flushing gives a smoother taste, apparently

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No, a flush means you run 3 to 4 times water to the size of the pot and then water when necessary.
You flush at least 10 days before harvest.