HELP! 4x8 LED grow ( day 34 of flower )

zane3747

zane3747

New Member
Hey guys i'll keep it short and 2 the point. 2nd grow in a 4x8 gorilla grow tent. Using organic nutes ( as seen in pic ) w/ 2 330w Advance LED full spectrum ( turned purple lights off for photos )

Using well water that comes out @ about 6.5-6.8 PH but is fairly heavy w/ minerals ( suspect this may be an issue )

3 skunk #1 / White widow plants and 3 ChocoLopez and 1 "Akorn" All free seeds i received from my previous order.

SYMPTOMS : Light greenish color accompanied by hooking and a burned look. Purpling on tops of most fan stems. Other plant seems to have heavy green w/ a little cupping downwards.

Have seen these issues worsen over the course of the grow and have not been able to fully reverse them, have tried epson salt foliar feedings as suggested on another forum w/ little success. I backed off nutrients completely for almost the entire beginning of flowering assuming that may have been the issue.

MY GUESS : Hard well water creating serious build up causing nute lockout? Not a clue as to how to fix this, sledgehammer flush?

Would appreciate any help, things have gotten worse in the past few days. Tyvm
 

Attachments

zane3747

zane3747

New Member
ugorg said:
take a look at these thay should help you
Click to expand...
These are some of the better charts i have seen, appreciate it. Unfortunately I feel like i have tried almost everything from adjusting PH to a flush to no nutrients to more nutes... Feeling defeated, wondering if the water could be the real issue.
 
ugorg

ugorg

Well-Known Member
you need to ajust the ph of the water to get the plant to take up the nutes your trying to give so if you need more iron you ph should be about 4.5ph to 6.5ph this gives the plant more iron if you need more magnesium you set your ph to 6.5 to 8.0
but most use a ph of around 6.5 this get the most out of the nutes and best range for plant to uptake
 
ugorg

ugorg

Well-Known Member
you need to test the ph after you add the nutes cos you well water is around 6.5 and you feed may lower or higher the ph so i would test after i add the feed and set the ph to 6.5 get a digital ph meter there not much
 
OneEyedCat

OneEyedCat

Active Member
Your nutes are probably dropping your PH below the limit for magnesium absorption, so get some distilled or RO water, (lots of it) water heavily with that getting lots of run off, then check the PH of the runoff and if it is below 6 your soil is probably too acidic.
Are you using the nutes at the rate they recommend on the bottles? If so you should probably back off to half of that rate and increase gradually from there.
I probably go too light on nutes but the are just to supplement the soil I mix up and some harvest is better than a dead plant.
I have very hard well water also but my PH is about 8 at the spout so anything I add that is acidic won't put me too far out of the range I need.
 
zane3747

zane3747

New Member
OneEyedCat said:
Your nutes are probably dropping your PH below the limit for magnesium absorption, so get some distilled or RO water, (lots of it) water heavily with that getting lots of run off, then check the PH of the runoff and if it is below 6 your soil is probably too acidic.
Are you using the nutes at the rate they recommend on the bottles? If so you should probably back off to half of that rate and increase gradually from there.
I probably go too light on nutes but the are just to supplement the soil I mix up and some harvest is better than a dead plant.
I have very hard well water also but my PH is about 8 at the spout so anything I add that is acidic won't put me too far out of the range I need.
Click to expand...
I always PH after mixing nutes and i always use about 1/4 to 1/2 strength of what is on bottle. Now i gotta figure out where and how to get 40ish gallons of distilled :cry:

Curious as to if you can tell what the deficiencies are from the pics ( i'm at a bit of a loss w/ all of the charts ) so i can then adjust PH to where it needs to be.

Really appreciate the response man. - Z
 
zane3747

zane3747

New Member
zane3747 said:
I always PH after mixing nutes and i always use about 1/4 to 1/2 strength of what is on bottle. Now i gotta figure out where and how to get 40ish gallons of distilled :cry:

Curious as to if you can tell what the deficiencies are from the pics ( i'm at a bit of a loss w/ all of the charts ) so i can then adjust PH to where it needs to be.

Really appreciate the response man. - Z
Click to expand...
Probably time to purchase a serious RO filter
 
OneEyedCat

OneEyedCat

Active Member
That may be overkill Zane,
I would just continue to check ph after adding nutes and use check for pests.
They really look good except for the few burned edges.
If you have a 5 gallon water bottle you can usually refill it with RO water at the grocery store machine for about 2 bucks. That could reduce the minerals in the water. Check that out on a plant or three and see if there is any change.
If the leaves aren't brittle or burning on new growth, don't worry about it at all. just keep on and ignore them most of the time.
 
zane3747

zane3747

New Member
OneEyedCat said:
That may be overkill Zane,
I would just continue to check ph after adding nutes and use check for pests.
They really look good except for the few burned edges.
If you have a 5 gallon water bottle you can usually refill it with RO water at the grocery store machine for about 2 bucks. That could reduce the minerals in the water. Check that out on a plant or three and see if there is any change.
If the leaves aren't brittle or burning on new growth, don't worry about it at all. just keep on and ignore them most of the time.
Click to expand...
Really appreciate the response :)

Just so i am clear RO = Reverse osmosis correct? Looking for a long term solution to factor out the hard water in future grows. Can you suggest any great systems for 10-20 plants in 7 gallon pots assuming we we will be flushing at least once. Looking in the 2-400$ range.
 
You must log in or register to reply here.
Top