Yield Robbers!...where did i go wrong?

Ok ive attached some good pictures of the leaves. But this seems to be the main culprit that is wrecking my potentials yields. Ive listed what i think it is in the following order:

1) P or K deficiency
2)Overwatering
3)ac is blowing too close to it
4)heat stress

if you notice in the picture its kina random where this occurs so thats why its so difficult to get a handle on this. Thanks in advance...i would like to figure this out before flowering the next cycle.
-sparki

i personally would say its nute burn, or they way too hot!!! wots your temps? and how far are the lights away ect also wot arew you feeding them?

bigweeds said:

i personally would say its nute burn, or they way too hot!!! wots your temps? and how far are the lights away ect also wot arew you feeding them?

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thanks bw, ok the temps are on the higher than average side usually around 88-90...there was a perios a week or 2 ago where the temps hovered 98 and even 100 for some periods...it was really hot weather. My lights are pretty far away..atleast 24" ill measure to confirm this...but i do have some heat and light stress goin on in the upper leaves. but they do look different (attached pic) from the ones im concern with. the light/heat issues will be dealt with after this harvest..im tearing down my center partition between the veg and flower and make it a single growroom...i need more space for 6 and right now im pretty close to 80w/sf...a lil much..

nute burns...just too much too fast?

More probably P def, clearly not nute or heat burn, overwatering or cold.

Before jumping ahead and adding more P, check your soil pH, it may be off, causing a pH lock out.

Im using advanced nutes grow micro bloom and just pretty much following their feed chart throught their online cal..but not reviewing the feed....i did remember i ran out of sensyzime...thats stuff is supposed to break down buildups so that the roots can absorb better....i did put in hydrozyme as a substitute although they arent exactlly the same stuff.

Your new pic indicates light bleaching. You'll have to also move your light further away, not to burn off all your tops.

Here's a useful method: keep your hand stretched out, palm up, next to the top of the plant. Keep it there longer than 30 sec. If it feels hot, it's also too hot for the plant, if it feels comfortably warm, it's ok.

Doctor Cannabis said:

More probably P def, clearly not nute or heat burn, overwatering or cold.

Before jumping ahead and adding more P, check your soil pH, it may be off, causing a pH lock out.

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ok cool cause i was reading the tutorials time and time and the section on P kept on bugging me...but im using big bud and overdrive so i gotta be putting enough nutes in it.

gonna look more into lockout...i flushed all the girls and two of them are showing improvement....meaning the new leaves stopped dieing but the dieing ones dont get revived...

i chech ph with the color indicating drops...so how do i check the ph of the soil?...just check the runoff?

buy one of those cheap green garden pH+moisture+light meters. They have 2 long rods, one coppe, one zinc, which you stick in the ground. They're not really exact, and work only if the soil isn't dry, but at least you'll know if your pH is between 6 and 7, and no under or over.

PS: Yeah, the leaves closest to the ligth did get a bit of light burn.

Doctor Cannabis said:

Your new pic indicates light bleaching. You'll have to also move your light further away, not to burn off all your tops.

Here's a useful method: keep your hand stretched out, palm up, next to the top of the plant. Keep it there longer than 30 sec. If it feels hot, it's also too hot for the plant, if it feels comfortably warm, it's ok.

Click to expand...

ya i overdid the lighting when i was planning the growrooms...400 would have been plenty for 8sf, 600 was just overdoing it...so im expanding the flowerin room by loosing the veg room after i harvest. unfortunately the lights are at the highest they can be...so next time around im planning to train them also to reduce height of the plants

Yeah, the usual limit is 75W/sq foot.

Doctor Cannabis said:

buy one of those cheap green garden pH+moisture+light meters. They have 2 long rods, one coppe, one zinc, which you stick in the ground. They're not really exact, and work only if the soil isn't dry, but at least you'll know if your pH is between 6 and 7, and no under or over.

PS: Yeah, the leaves closest to the ligth did get a bit of light burn.

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of course...ive seen them at wal mart all the time...rookie question haha...moved and no 24hrwal mart anymore but 8-9kmart.

ok im definately going to pay more attention to soil ph and not just what im feeding. also i throwing away the trays i bought for under the pots, they collect like an inch of runoff and i see a lot of nutrient residue...guess dealing with the runoff mess is better than dealing with salt buildup

Why would you want to throw away the trays? If too much water collects, just water less.

Advanced nuts ph balance the mix, I think you have heat stress.My temps got into low 90s before I put my AC in this spring and my plants suffered. Temps can be no higher than 85 degrees

Doctor Cannabis said:

Why would you want to throw away the trays? If too much water collects, just water less.

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hmm....whoa...guess thats a good sign that im over watering....i try to use all the mixed nutes whenever i mix....my nutes are mixed in a 5 gallon water container...the nutrient seems to break down a lot over a week and it leaves a lot of residue on the container...i thought whatever i left in the container would leave a very concentrated amount from all the buildup on the bottom....hmm...looks like i gotta not be lazy and just mix 4 gallons (i just filled the bottle to the top assuming 5 gallons).

Mr.Therapy Man said:

Advanced nuts ph balance the mix, I think you have heat stress.My temps got into low 90s before I put my AC in this spring and my plants suffered. Temps can be no higher than 85 degrees

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yea..unfortunately in my planning stage i figured that the garage wasnt going to get that hot...bad assumption with this heat spike and all these fires in the mountians made my room spike up to 100 at times....this week has been cooler. when reviewing my grow i did see a lot of salt buildup through the drainage holes on the pot. i think this was the bigger contributing factor because they were actually growing very well and my growroom have been 87-91 pretty much most or the grow...this got me thinking. Ive read that temps above 85. im growing afghanis and headband and i dont think the +85 bothers the afghanis but the headbands arent as strong...seeing that strains make a bigger difference than i though...i asked my friend who is serving in the military in afghanistan and he told me that its always hotter than 90 deg there. but the next cycle will should confirm a lot of things. im trying to tackle 2 main probs (nutrient ph/tds, and heat) at the same time so its hard to isolate the problem. im going to focus more of ph control and feeding next time around....if i get the same results...then ill know it cause of the +85...is i get good results...then ill know that my "it hotter in aghanistan " theory is true and they have no problem being in +85 temps.

looks like a ph lockout and too close to lights for the 1,2 combo

You really cant tell you have had heat stress but my weight and potency suffered from high temps

i was cleaning out my grow area and i found the pot of a lill girl i chopped last week cause she looked like she was almost dead. this is the only pot i didnt flush

Mr.Therapy Man said:

You really cant tell you have had heat stress but my weight and potency suffered from high temps

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ya im hoping to tackle the high temps before the next cycle...i guess ill know how much im missing out...first cycle so i dont have anything to compare it to just yet, but compared to my previous attempts with fox farm its aready growing much more. i really wanted to do a comparison of soil vs hydro but ive but its been such a battle with soil so i havent been able to start dwc hydro...guess thatll be in the 3rd cycle hopefully.

TurfScience said:

looks like a ph lockout and too close to lights for the 1,2 combo

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1,2 combo...perfect description...its been a battle to get this harvest