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Growerwils..... Before assuming your plant needs Nitrogen, check the soil pH. Chances are the application of bone meal, may have been a bit much, which caused a big shift upwards in pH. Bone meal, even the kind with N in it, tends to be fairly alkaline (high in pH).
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If your soil pH is 7.2 or over, Nitrogen in the rootzone is being locked out. The only way to free it up is to lower the soil pH.
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Like if you top dressed the bone meal, scoop some back out. Pour through some water with a pH of 6. Or if the bone meal is thoroughly mixed in with the soil, buy a cheap 2-liter coke at the dollar store. Soda's (especially coke) have a pH of 3.5 to 4
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Pour the entire two liter soda into the soil surrounding your affected plant.
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Then give it a few days to bounce back, after that, water only (make sure the pH is between 6 & 6.

for one week.
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If soil pH is not the issue, provide your plants with a grow type fert, higher in N and lower in P & K.
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The loss of fan leaves is OK towards the end of the flowering cycle, but two weeks in, is too soon.
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Hope this helps....
Keep it Real....Organic....
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