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Not enough nutrients for Nirvana Maui Waui in light soil?

MicroNighthawk
MicroNighthawkstarted grow question 2 years ago
I have overfed my last grow by spraying it with Alg-A-Mic... so this time around I kept giving her only a minimum of nutrients. Looking at the yellow leaves and the brown spots... most of the leaves touched the tent... am I UNDERfeeding her now?
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Week 11
Leaves. Color - Yellow
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GrowingGrannie
GrowingGrannieanswered grow question 2 years ago
You say you've added BioGrow since you've read it's mostly molasses... while this may be true (who knows!), the NPK of it is pretty strong on nitrogen (7-2-4) ... add to that, the Top Max is ALSO really heavy on nitrogen - in fact, with an NPK of 4-0-0, it's almost pure nitrogen... so this is now causing a lockout of calcium and perhaps even potassium.. You've got a couple of options here, I think. If you anticipate harvesting sometime soon (i.e., 2-3 weeks), I'd just give her pH'd water for the next week and when you resume feeding, cut that BioGrow down to almost nothing and pump up the bloom nutes some... in flower, plants don't need as much nitrogen as they do in the veg state. If you think she's going to go longer, I would probably flush her (45 liters of pH'd water through each pot) and add nutes to the last liter you run through - but with half the BioGrow and Alg-A-Mic, NO Top Max and keep the doseage of BioBloom the same. Going forward, I would keep the Bio-Grow at half what you're giving now, I'd get rid of the Top Max and double the BioBloom... You don't mention what pH you're maintaining... but this is crucial as well... you've got to make certain the pH sits between 6.0 and 6.3 at this stage of the game. Any lower and neither calcium nor potassium will be absorbed by the plant no matter how much of it you throw at her... You CAN go a little higher (6.5 max) but try not to... And btw... you're one of MANY growers that have had problems with both BioGrow and especially with Top Max.... so don't kick yourself... just be aware of how much nitrogen both contain if you use them in the future! Good luck! The grow looks amazing and you're going to have a really NICE harvest!
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GrowingGrannie
GrowingGrannieanswered grow question 2 years ago
Just a head's up... when you reply or add a comment in here, no one is notified - it's not like a chat... I only came back to this as I thought someone else had given you an answer.... ANYWAY... The Top Max would have been enough to do this to your grow... and if you're giving the nutes to her EVERY DAY, I'm not surprised she's overloaded with stuff! You need to give plain water in between your feedings... and you need to give enough water so that you are getting about 10-20% runoff... this help clear out accumulated salts and nutes from the soil... Some growers practice a routine of water/water/feed/water/water/feed.... I happen to go with water/feed/water/feed.... but you've GOT to water inbetween feedings. The big question for you is when do you think you're going to harvest? I've given you the two scenarios below and my recommendations for each... perhaps someone else will pop in and give you a different answer but the new information you've given hasn't changed my mind... it's what I would do if this were MY grow! Good luck!! ๐Ÿ˜Š
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MicroNighthawk
MicroNighthawkanswered grow question 2 years ago
I have only started giving her Bio-Grow again last night... Before it was only clean rain water ( ph 6.5) with 1ml of top-max, 1ml of bio-bloom and 1-2ml of alg-a-mic... I water her daily with about 1l of this mixture. PH is around 6.4
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