Hi gudyul,i wish i can smoke,haha
I always want try it...
I read some articles from internet that they said it's better not spray anything,so i want to make sure :if i really need to spray something to my plants,which kind of things i should avoid?
How are you these days? Did you go on your summer vacation?
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Hi TorturedSoul,Yeah,i should mention that.
You may wish to include the information that the above is just a generalization. That nutrient requirements - and tolerances - vary by strain. Some strains evolved, or were bred, to do well when grown in soils that are not very nutritive. Those strains can burn at higher nutrient levels. Other strains are the plant equivalents to gluttons, lol.
Some strains are not very resistant to mold. This seems mainly to be certain indicas that have a very dense bud structure, but it is not necessarily limited to them (and some indicas that produce dense buds, conversely, appear to be somewhat mold-resistant). The breeders of some strains advise not to grow them outdoors in areas where rains are expected to be heavy late in the flowering period, for this reason.
The above might be part of the reason for what you have read. Another reason might be that some substances, when sprayed onto the buds, might... linger. For example, certain insecticides are generally considered to be harmless to people, but others are not. Of those in the latter category, some will decompose(?) after a period of time; this time might be as short as 24 hours, especially in the presence of strong light - but the length could potentially be longer. Then, too, some people like to foliar feed certain nutrients (et cetera), and a person might not wish to see such things still on the buds at harvest time, lol. It is important to remember that not everyone smokes their cannabis (many medicinal users suffer from lung aliments, and some people just do not like to smoke it). The buds might be made into food items or otherwise consumed.
It is not that "one should never, ever, spray anything on one's cannabis flowers (buds)," I think - it is more like a general rule. Something like... Well, we say here "better safe than sorry," lol. If you say that it is unwise to spray things on cannabis flowers, then you do not have to worry so much that someone will spray something that should not be sprayed. If that makes any sense? Think of it like this: A mother tells her young child not to cross the road. She does not do this because the act of crossing the road, in and of itself, is always inherently unsafe - she does so because there are certain circumstances in which it is not safe. Rather than to try to explain (and think of) every single different situation and discuss the relative safety (or lack thereof) in crossing the road under those conditions... the mother says, "Do not cross the road." Better safe than sorry
Neem-based insecticides are said to be safe to spray on our plants (even fruit and vegetable plants) up to the day of harvest. That means that we would not be poisoned if we consume the fruits of those plants. Still... It might not taste particularly good, lol.
And do not need snake oil,haha.
I should better consult more growers like you guys than goole all the time.I agree that there are times when spraying (foliar feeding, et cetera) are warranted. As I was getting at, the advice against spraying/feeding during flowering is not a hard rule for all times/situations/growers. Merely... Well, you can spend two minutes explaining to someone how to grow cannabis, or you can spend (at least) a day. If giving the "quick basic cannabis course," lol, I would say, "Try not to spray your buds." Experts (and those who wish to one day be experts) would, I assume, try to learn more than the barest essentials.
I especially agree with what you mentioned about foliar feeding certain nutrients. Some things... I have noticed that some things are more readily absorbed at different pH than the generally accepted ~5.8 for hydroponics / ~6.5 for soil. It might be simpler and easier to administer such things as a foliar feed.
I'm not sure that I would want to place General Hydroponics' Rare Earth silicone product in a DWC reservoir ever again, lol. It caused a rather extreme (and rather fatal :rolleyes3 ) pH shift. Still, I would like to be able to give it to my plants, because I feel that it does have benefits. I will probably try giving that as a foliar feed at some point in the future.
And, regardless, it probably is not at all fun
Cannabis...
Yes. But I presume that those strains are ones that have been naturalized/acclimatized over generations to thrive under such conditions? I could probably spend an hour browsing at one of our seedbank sponsors' websites and come up with at least a few plants that would not do well at all in your climate.
In many parts of the world, Botrytis Cinerea (et cetera) spores seem to be pretty much everywhere. In a lot of northern latitudes, it can be tough to grow many strains outdoors. And even indoors. I am kind of in a "flip a coin" area - mold can destroy a bud, destroy a crop, or not even be present (or at least not be observable). This does not seem to be much affected by the cleanliness of the grow room - total sterilization only means that there are no viable spores to begin with. I have no airlock with a decontamination station inside, along with Tyvek suits to put on, lol. I grumble about spider mites, calling them "The Borg" and mentioning that I hate them. This is because, if my grow area becomes infested, it is a real battle. But it is a battle that can be won. With mold, it seems like one cannot truly completely kill it once it gets established - only fight to minimize it, do damage control, keep applying treatments and removing affected portions of the plants (and then plants), whilst hoping that there is still something to harvest. As I will be giving to people for medicinal use (and as my lungs are kind of shot), I would probably just tearfully destroy every plant, dismantle the grow, wash everything down with a strong Clorox bleach solution, and try again.
Nice! Around here, we've been saying "gets you there" ever since 1976 when Rush released their 2112 album.
What Are You Listening To?
New goods arrived at our Germany&UK warehouse.We have enough stock at each internation warehouses,everyone can place your order now. 
I think it's the same way for vegetable:less spray,safer dinner.You don't spray during the last few weeks in flower,it will be good for the harvest,i think.
Powdery Mildew
i got it,i will not say it to other one.It's secret.Really I'm just overly cautious about the one we dare not speak its name unless in a whisper
Indica,sativa which one you prefer more? 
How about we design one tent 2-in-1 tent,and another sinlge tent only for seedling/VGE ?So it depends on you want roll it up or just put it aside then.
Translates is no problem,i can understand. It's double sliders zipper,and we prevent the light leakage from inside of the zipper,it may not be a big problem?
