Wouldn't there be a difference in the taste of the bud if you only fed water for the last week or two? For example fox farms nutes when you combine all that shit smells kind of like spoiled milk in the water after mixing. Would think this would make a difference in the taste of the smoke if you left this in the bud to process.
What does shit smell like? Shit is a natural fertilizer. Farmers use it to grow food, and they never flush. What does your veggies taste like?
I used worm shit, when I was growing organic. I never flushed, and never tasted worm shit, or any shit for that matter.
Take a smell of some fermented alfalfa extract some time. Stinks to high heaven.