Regarding "burning":
Take a look at this picture and notice all the yellow tips that the modern growing world considers to be "burning."
This is my current Poison Daddy, growing like crazy and about a week into bloom. She constantly shows this symptom... but here is the point. She is not being fed traditional nutes. She is being fed organically, using Geoflora Nutrients. She is not being overfed. She is in the organic feeding cycle, where the microbes and the plants form a symbiotic relationship and the plant tells the microbes exactly what nutrients it needs and in what quantities. So, is the plant overfeeding itself and burning those leaves??
Every organically grown plant I have seen, does this. Whether I am using the TLO organic method and applying regular Actively Aerated Compost Teas, Realgrower's Recharge to supply the microbes, or Geoflora as I am now using... every organic grow acts this way.
There is also an adage out there for those who do use traditional fertilizers, that if you are not at least "burning" the tips, you aren't trying hard enough. So I went to my AG professor to ask about this... does organic growing really burn the plants?
It turns out that the tip burn that we all look for, is not actually a burn, but is a sign of a process that is going on in the plant that has had enough of nutrient and is signaling to the microbes below that it does not need any more for right now. The very same process is happening at the tips of the leaves and the tips of the roots... the message down below is that these roots no longer are taking the nutrient... come back later. Of course, the leaves being mirrors of what is happening at the roots, show the same indicator... we have had enough on this round. My prof explained that this tiny "burn" at the tips of the leaves is akin to a good belch after a great meal, and just as this is a complement to the chef in some areas of the world, it is also an indication that all is perfectly well fed... it is not always simply an indication that you have given too much.