Athosanswered grow question 7 years ago You are correct in your assumptions. You have nutrient burn, you can tell not only by the burnt tips, but by the really dark foliage, which indicates Nitrogen toxicity. You should feed once every 7 to 10 days, why? because it takes that long to see the effects of a feeding on the plants. Also, only water once you see the soil has really dried up, don't stick to a set amount of days, it could take 4 days? sure, although it could take much longer.
Also, although I'm not familiar with your nutrient line, it does seem like too much, I mean 29 tsp? I've never seen that much of anything been used.
Now, you are already beginning the 7th week of flower, you are almost there, so don't give anymore nutrients, only pH'ed water and let the plan consume what's left on the soil and on it's leaves to power what's left of the flowering stage, hell you should do a flush to help along.
I say this to almost every grower, but get an EC/PPM meter to check your feeding strength, for soil you should aim for a concentration of 0.7 to 1.4 EC depending on the phase, you would be amazed how toxic some of the schedules the nutrient companies recommend us to use.
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