Bicycle808 said:
Sure, the best practice is to try to figure out the root cause if possible, and address it as best you can. But we shouldn't act like the suggestion to try some Epsom foliar spray is some sort of faux-pas. It's conventional wisdom. I get that Solid7 questions the actual wisdom of this particular convention, but ppl use it all the time without disaster striking.
The problem is, when you accept a conventionally accepted practice, without the knowledge of whether or not it's actually helping, you miss the opportunity to correct the actual problem. And you miss the opportunity to improve your own knowledge, in the process. (it's been my general experience that knowledge is a pretty valuable tool for later on situations)
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Think of it this way: You have a sore foot. Without any further questioning, you pop a couple of your favorite pain killers. (because that's just what everyone has always done) Heck, maybe you take some elephant hair and tiger penis tonic, too. It can't hurt, after all, right? The pain goes away. It later emerges that you have a stress fracture. You could have fixed the problem right the first time, but you chose instead to try to "quick fix" it. Now, you will endure the pain a bit longer, and probably chase it with a few more pain killers. You may even end up doing this as your de facto method, for the rest of your life. Some might call this foolish. (I might be one of them) Of course, you don't know what you don't know. I'm a natural skeptic of all things, and I pretty much question everything. (you'd be surprised at how many people tell you things that can't explain to you in any depth, why they're telling you to do it)
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Let's remember that a lot of people here are rookies, and are just growing for the first time. As humans, we tend to take our first experiences forward with us. We form habits out of them. We pass those habits on to others. Something like 90% of the forum posts are recycled issues, that get dealt with over, and over, and over again. You'll have to forgive me if I upset some with my questioning of the orthodoxy. My only aim is to help make better growers out of people. And honestly, this is not hard stuff. But it's tricky, when you have everyone and their dog trying to either sell you something, or showing you up with the type of plants that you want - while never telling you, or even knowing themselves, that a lot of growing success is due to factors that are beyond our control. I can grow more peppers in a single season than most people on this forum, for example, but my plants don't ever even come close to looking half as good as some that I see here. But you know what? It doesn't matter, because I know why that is. And I want to help everyone that reads my posts find the way to growing success.
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I'm not a rookie. I've been growing plants since I was a little kid. Raising produce and selling at market before I was in middle school. And I'll tell you right now... I've NEVER in my life sprayed epsom salts. So take my advice or leave it. But that's my story, and I'm sticking to it.