I wash my harvest before drying (both indoor and outdoor). It does not hurt the trichomes, and I believe it results in better tasting smoke. Once you try it and see how dirty the wash water is, you will not want to be smoking that dirt. I wash in diluted hydrogen peroxide solution with one drop of dish detergent. Most people recommend 8 ounces of H2O2 per 5 gallons of water; someone else can translate that into liters
I harvested one plant of The White first week of September, this was a clone started in April. This is an outdoor grow with wind blown dirt, bird poop, bug poop, garden splash, and other environmental impurities.
My wash line. From left to right: a box of cuttings, wash bin with 10 gallons of pH 6.0 water, 16 ounces of H2O2, and one drop of dish detergent, Then a rinse bin, and finally an empty bin for the wet washed buds.
I weight down the buds with metal grill pans (clean but ugly) because buds want to float. I want the buds submerged in “disinfecting” solution for 6 to 8 minutes.
When time is up, or I become impatient, I remove the weights, use one hand to clear a corner of floating buds while I grab the stems of other buds and dunk a couple times to agitate, let it drip for a second, then throw into the rinse bin. I dunk each bud a couple times in the rinse, let drip, then place in the final bin ready for drying.
Dirty water; you don’t want to smoke this crap.
Drying branches on a line and small buds in a hanger. These start out very wet, but after a day they are about the same moisture content as unwashed buds. That’s a Gorilla Glue starting to flower in the background.