I grew in coconuts,for a week now the plants have been drinking only clean water.why don't the plants turn yellow?i don't want to smoke nutrient

you won't smoke nutrients. buds don't store excess minerals. tests prove as much, plus common sense regarding basic cell differentiation.. they are sex organs and not storage facilities. gas chromatography and othe tools and methods resolve what we cannot resolve with our sense... you can trust this info 100x more than anecdotal nonsense, i mean knowledge. flushing does nothing perceptible to the resolution of human taste, smell or sight. In fact, a blind study showed a small majority actually preferred the non-flushed buds (though, statistically insignificant difference... meaning you absolutely cannot distinguish it unless you know ahead of time, at which point that's some neurotic bullshit going down likely involving denial or ego, Bwahahah). Any human sense for that matter is trash compared to the equipment and generational knowledge we have. It's there... use it. We don't have to start from scratch and pretend we made all this up on our own. You flush a plant when it has a severe toxicity/imbalance so bad in the substrate you have no other option. Flushing has some overtly negative impacts on the plant and should be avoided when possible. When done for no real effect beside a figment in some subculture's groupthink, the dynamic doesn't change... still stupid. that is the cause and effect of that particular tool/method. *maybe, you are just lazy the last week and don't want to mix some nutes up --- while this isn't 'best' for the plant, it is a viable option. the negative impact will be so negligible, that again, human senses will not perceive a difference (unless you are growing 1,000s of plants, maybe that changes at some point due to scale)... i'm not saying it is stupid to flush... i'm saying it's stupid to think it reduces minerals or helps the buds in any way. it will more likely have a negative impact despite the fact we cannot resolve it with our human senses. 'flushing products' are absolutely useless, save your money. if it has become hydrophobic, add a wetting agent (surfactant) in a soilless context, you should see symptoms within 3-5 days of flushing... if not, you probably feed a bit on heavy side and the plant was just more lush and still sucking those leaves down with minimal visual change... or maybe the roots are not fully into every nook and cranny of the pot and what doesn't get drunk in those spaces remains and diffuses into nearby material the next time you dump water on it. this would cause a longer period of time before you'd observe any plant reaction. (not the only possibility*) when you eat chocolate, your skin doesn't have chocolate in it.. neither does your muscle mass, brain or lungs etc... you don't get chocolate in you testes or ovaries. While a plant is not as complex, it still has cell differentiation. Certain material performs certain tasks and there may be some overlap, but various cells stay in their lane for the most part... phyiscally impossible to do anything else without the proper internal equipment anyway. They evolved to peform a function and they continue to do so. sex organs aren't going to multitask much. e.g. light hitting buds does not make as much of an impact on that budsite as light hitting the nearby leaves and fan leaves connected to that node (assuming they were not removed)... yet ppl believe something else like it's some sort of religion or they've "seen it" desipts 100s of other moving variables that could have cause what they saw cause there was no control group or attempt to differentiate what was actually occuring. while anything 'green' can probably photosynthesize a little bit, it is nothing compared to the energy produced from light hitting the top of a leaf... even an underside to a leaf has significant attenuation. only after fully saturating the top of every leaf would adding light to any other plant surface be a net positive relative to opportunity cost of what is left on the table from not maximizing light on top of leaves, first. a lot of knowledge already exists and is widely ignored or ppl are completely unaware that it exists. seek out generational knowledge over anecdotal dreck.. when generational knowledge contradicts anecdotal nonsense, drop that nonsense like a bad habit... adapt and evolve... learn cause and effect of what is actually happening... not some propaganda talking about "activating" "cleansing" or any other vague magical words that sound good but don't actually explain jack shit. that's just going to lead to some overpriced product that makes "you" feel warm on the inside but is actually useless.