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The rust spots on the leaves are getting worse. I ...

Growpotkin
Growpotkinstarted grow question 4 years ago
The rust spots on the leaves are getting worse. I flushed twice and fed with a bit of extra runoff, but a day later and the curling burnt ends look like nute burn. Any thoughts would be great!
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Week 10
Leaves. Color - Mottling
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horsemouth
horsemouthanswered grow question 4 years ago
if you flushed and it got worse it means it is not a nue burn. it looks to me like a big nute def. the fisrt 2 pics looks like a heavy potassium deficiency, the third a lack of phosphorus and in all of them i see nitrogen def. in my experience under qbs, like yours mars ts, plants need more k than under hps or cobs. to solve this i would feed her with some bloom fert (like n.p.k. 2.2.4) and a strong pk (like 13/14). but go easy with them the first time and rise a bit every time.
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MangoDudu
MangoDuduanswered grow question 4 years ago
Led light cause more absorbiment of micronutrient , you have to give them some calmag to let them do the photosintesis correctly ( the purpling of leaves on top)and re integrate the soil with some base nuts in low ammounts.
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Tango_Hotel_Charlie
Tango_Hotel_Charlieanswered grow question 4 years ago
Did you add dolomite lime to your soil before you planted?
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2020Grower
2020Groweranswered grow question 4 years ago
Looks like You grow under led? Purpling leaves are giving it away. Leds require a lot more nutrients because the lights are so bright. Looks like your low on some cal mag , in my opinion. What ppm are you feeding ?Try upping your nutes.
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