The reason I've switched to using GH's dry nutes is not because my CRF buds didn't burn clean and taste good, but rather that since my "just add water" thing didn't work out because my tap water sucks, it's not much more work to add nutes to my RO water along with the cal-mag.
The two-part GH dry nutes give me more flexibility in dosing and juggling the NPK, are cheaper than CRF's, work very well in both soil and hydro, shelf life isn't a problem, and my plants are very happy with them.
Flushing should only necessary if plants accumulate too many nutes, which shouldn't happen with CRF's, but as more CRF-grown plants are harvested and smoked, we'll have more reports and data.
My recent PPP harvest burns with a clean gray ash, and is smelling better and better as it cures. Another couple of weeks and I think it's going to be very good.
"Preharvest flushing puts the plant(s) under serious stress. The plant has to deal with nutrient deficiencies in a very elevated part of its cycle. Strong changes in the amount of dissolved substances in the root-zone stress the roots, possibly to the point of direct physical damage to them. Many immobile elements are no more available for further metabolic processes. We are loosing the fan leaves and damage will show likely on new growth as well.
The grower should react in an educated way to the plant needs. Excessive, deficient or unbalanced levels should be avoided regardless the nutrient source. Nutrient levels should be gradually adjusted to the lesser needs in later flowering. Stress factors should be limited as far as possible. If that is accomplished throughout the entire life cycle, there shouldn't be any excessive nutrient compounds in the plants tissue. It doesn't sound likely to the author that you can correct growing errors (significant lower mobile nutrient compound levels) with preharvest flushing.
Drying and curing (when done right) on the other hand have proved (In many studies) to have a major impact on taste and flavour, by breaking down chlorophylls and converting starches into sugars. Most attributes blamed on unflushed buds may be the result of unbalanced nutrition and/or overfert and unproper drying/curing."
whats GH's dry nutes?