56 days into Flower

[liquid069]

Hey guys I need some help. I just flushed 2 days ago with straight tap water (here the ph is 7.2) Because of the brown spots you see. Now I'm seeing this deep purple color on the yellowing leaves. It seems to be starting at the top and working it's way down.

I do have a product called Flora Kleen which i did want to use in about 2-3 days. The following information can help. I have a run-off ph of just about 5 and for some reason I cannot get that to change. Please any advice would be amazing this is my first grow and I'm soo close I don't want to mess up!! PLEASE!

whats wrong?
PICS BELOW
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How long has this problem been going on? week brown spots 1 day purple
What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...) SOIL FFOF
What STRAIN are you growing? Cali Orange X Durban Thai
What was the establishing technique? (Were the seed or clone?) SEED
What is the age of your plants? 12 weeks from seed
How tall are the plants? 3ft
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? FLOWERING
What Technique are you using? little lst
What substrate/medium are you using?(Hydroton, RockWool etc.)
What is the Water temperature?
What color are your roots? White? Brown? Are your roots slimy?
What Nutrient's are you using? How much of each if using multiple? FF tigerbloom and FF cha ching
When was your last watering? 36 hours ago flush
What is your temps? 69 night 78 on
When was your last feeding change? (ie. grow-bloom-micro-additional) 2 weeks ago cha ching
How often do you water EVERY 3 days
What size bulb are you using? 400W HPS
What is the distance to the canopy? 6" to top bud
What is your RH Factor(Relative Humidity)? 40%
What is the canopy temperature? 79.8
What is the Day/Night Temp? (Include flucutaion range) 69 night 78 on 9 degree flux
What is the current Air Flow? (cfm etc.) 178 cfm in 3x2x6
Is the fan blowing directly at plants? CIRCULATING
Is your water HARD or SOFT? hard
What water are you using? Tap? 24 hours sit and a capful of h202
Has plant been recently pruned, cloned off of or pinched (define pinch please
Have any pest chemicals been used? If so, What and When? NO
Are plant's infected with pest's NO


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This was before the flush!!

 

[Doug_Marsh]

I had a strain that purpled like that it could just be the genes. Some of the caylax's look purple as well. As for the yellowing I wouldn't worry about that. Your pretty far into flower and some N def is normal. I'm sure someone a little more knowledgeable will chime in soon.

5 is a bit low for your ph as well might wanna try to raise it to 6ish.

Tasty looking buds!

 

[Brother_Monk]

Looks to me like a phosphorus deficiency, caused by lockout from high(acidic)ph. Your ph is 5 after a flush? You need to flush more with ph'd water of 6.4-6.8 Once the water coming out, is same as going in, then you can stop flushing. If you are not near enough to harvest, then you want to water one last time with a half strength nute solution, and a capfull of Hydrogen peroxide. After all that water, you want to carry some oxygen down to the roots.

 

[liquid069]

Brother Monk , Should I flush again immediately to get the desired 6.4 ph out? or wait since i just did 2 days ago?

 

[Brother_Monk]

They will not recover with ph5. I understand your concern about overwatering them too much. Yes, flush with ph adjusted water to the above settings. It is important that when you finally are getting the correct runoff, that you flush one last time with the half strength nute solution, AND the H202. How much longer are you planning on flowering?

Either way, if you let them go as is, or do more flushing, your yield will suffer at this point. If you keep flushing, you may see a stalled period of tricomb production. Which most of us really enjoy seeing at this stage of the game. On the other hand, if your lockout continues, the plant may just stop producing completely. Would you rather have them continue burning, or stalled a week or so?

 

[liquid069]

Brother - It looks like the bud growth has stalled. I wanted to go another week. So basically as soon as the lights come on I should flush untill i can get a decent runoff and then last water with half nutes ? Because of this let them go an extra week then I would have?

 

[liquid069]

ANYONE? I'm going to flush right now unless someone tells me not to

 

[stihgnobevoli]

those plants look fine to me. the purpleing is prolly just defeciency from the plant using up all the nutes in the leaves. molybdenum and phos prolly. its natural at this stage. what have you got like a week or 2 before chop? just continue watering it lik normal and enjoy your bud.

 

[Brother_Monk]

If you're only flowering for another week, then just finish them as you normally would. There's not much sense in going through all the trouble at this late in the game. Wish I knew this info before I gave you my opinion.

If you have already flushed again, don't worry. Getting rid of all them excess salts will only help improve the taste of your final product.

 

[knna]

Fully agreed with the diagnosis: normal lack of N at late flowering and slight P deff due to low ph. At this point, the best would be continuing this way and dont do nothing.

And for the next run, add some limestone to the soil mix to avoid it acidifies so much. Often hard water is enough to avoid it, but it seems its not your case.