dry brown spotted leaves?

Hello, im about 3 weeks into flowering and have noticed a few leaves developed brownish spots. they feel dry as well. it is on 3 of the 4 plants that i have in the tent. they are due for a watering and nutes but wasnt sure if i should skip the nutrients this time incase of it being burnt from it. any suggestions?

What’s your nutrient ratio ? Did you switch to flower nutes ? There not burning the tips would be burnt.

im using fox farm nutrients and yes have started using the flower nutes. im using 1.5 teaspoons per gallon of big bloom, 1 tsp grow big and 1 tsp of tigerbloom. i use nutes every other watering and water about 2-3 times a week. i use all three nutes for 2 cycles and then 2 cycles with just the big bloom and the tigerbloom, leaving the grow big out.

Leaf Septoria maybe?

the silence is killing me... and my plants!! lol Ca or Mag defeciency? maybe PH inbalance? anyone?

Make sure it's not pH locking you out B4 you give the plants anything.
http://www.ilovegrowingmarijuana.com/marijuana-nutrient-deficiency-phosphorus/

Ph seems to be fine at 6.4

xstevex21 said:

Ph seems to be fine at 6.4

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Is your meter calibrated?

http://www.growweedeasy.com/calcium-deficiency-cannabis could be this looks real close to your pic or what Jypsy Dog said my plants had a Cal Mag deficiency look real close to that showed up right at beginning of pre flower.

Just bought some Cal-Mag, will see how this does.

If your in soil and have a pH of 6.4, the plant can't up take the Calcium , Magnesium or Phosphorus. Don't just throw things at it until the pH is correct.

what are you feeding it? pH is not the problem. Nor does that look like a calcium deficiency. Looks much more like its on the verge of nute burn. My guess is you have been feeding it high P bloom food.
edit: I now see you are using FF. The Tiger Bloom contains way too much P in ratio to N and K. Too much P is the issue IMO.

Jypsy Dog said:

If your in soil and have a pH of 6.4, the plant can't up take the Calcium , Magnesium or Phosphorus. Don't just throw things at it until the pH is correct.

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Where did you find that chart? Pretty misleading IMO. Plants certainly can uptake both anywhere between 5.5 and 7.5 as a general horticultural world.
https://www.spectrumanalytic.com/support/library/ff/Ca_Basics.htm

I dont use a lot of nutes really and use them every other watering. i have the fox farm trio nutrients and use half strength that the chart tells me to. maybe they are not taking in enough nutrients

Stink Bug said:

what are you feeding it? pH is not the problem. Nor does that look like a calcium deficiency. Looks much more like its on the verge of nute burn. My guess is you have been feeding it high P bloom food.
edit: I now see you are using FF. The Tiger Bloom contains way too much P in ratio to N and K. Too much P is the issue IMO.

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is there a way to balance that out? or do you reccomend not using the tiger bloom?

Toxic salts buildup. Look it up.

Low RH I bet. Happens to me all the time but now I run nutes half as strong and the last grow was good with no sign of that.

Sometimes the puzzle is easier than you think.

Stink Bug said:

Where did you find that chart? Pretty misleading IMO. Plants certainly can uptake both anywhere between 5.5 and 7.5 as a general horticultural world.
https://www.spectrumanalytic.com/support/library/ff/Ca_Basics.htm

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Yea your RIGHT!!! Lots of plants love an more acidic soil. Weed just ain't one of them.
https://www.almanac.com/content/ph-preferences

xstevex21 said:

Hello, im about 3 weeks into flowering and have noticed a few leaves developed brownish spots. they feel dry as well. it is on 3 of the 4 plants that i have in the tent. they are due for a watering and nutes but wasnt sure if i should skip the nutrients this time incase of it being burnt from it. any suggestions?

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If I had to guess, I'd say its due to K tox. The combo of dry/crunchy feeling and rust spots described and pictured.