The only nutrients I used is dry organics
4-4-4 Do I still need to flush?
![Tiphat :toke: :toke:](/data/assets/smilies/tiphat.gif)
-- With organics, generally no need,... that myth buster thread covers this pretty well. Organics are slower release, microbes are key and more intimately involved because they help break down, convert and cycle the components into forms which the plant can take up... Of course, it's not smart to pour the organic nutes on heavily right up to harvest either too, even that can be over done-- yes, organics can cause burn! pour a shitload of composted chicken or bat manure on the plant and it will fry the plant, right .... Also, the medium isn't typically as heavily loaded up as it can be with synthetics; plant take in certain nutrients whether they need it or not, there's no real selective process here, but they can store is (mobile nutes only, BTW) up to a point,... past that and toxicity can become apparent in symptoms... But a note should be made here first: no matter the source, what nutes go in are all the same to the plant, they take up only certain specific forms of nute ions, period, regardless of source; most synthetics are already in such forms so uptake is immediate for availability, Nitrate is nitrate to them, K+ is K+, the source make zero difference....
Mobile/immobile refers to the ability to translocate those certain nutes from established tissue to newer growth where it's needed,... Some, like most all of the micronutes, are not mobile, or very poorly so, and low levels of those should be around all the time because of this,.. for final ripening, S and Mn (both immobile) are involved with terpene production, as is K,which is mobile, but you sure want the others to be available for better end product!.. Basically, if you see you fans getting tapped out, that's a good sign. If you feed heavily, and at near harvest the plants are looking rather green and few leaves are faded, that's a sign the internal stores are still high... high levels of these nutes do make for harsher smoke. What BII said is on point,... So, flushing can be helpful under some circumstances, but IMO not always.... For sure, a few days or so nothing but water is wise, just to clear out what's in the "pipes", the vascular system getting transported... The medium you're in factors as well, if it's soil/soilless and is holding a heavy store of nutes; here is where an actual flush may be needed to purge all that excess, and allow the plant to draw more heavily on it's reserves... The term "flush" is a misnomer really, absolutely nothing is removed from the plant by that definitive term, the flow of nutrient ions simply doesn't go that direction!
The other side of that is starving for too long, IMO 2 weeks is ridiculous unless the plant has been hammer and overloaded with nutes all along, and the medium is holding a lot still...including micros',... In something like hydro, where the content and concentration of certain nutes can become depleted or unbalanced, with potential negative consequences, 2 weeks is detrimental... Even the nute manufacturers don't "schedule" 2 weeks of flush, for reasons covered in part at least, above...