Coco ph run off 7.4 plant suffering

Your Equipment:
.1) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's)
Omega 315w cdm pro+ digital DiMable x2
.2) Distance from tops?
50cm
.3) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...)
Wing reflector
.4) Is there a consistent fresh air supply?
Yes
.5) Do you have an exhaust fan and a circulation fan?
Have 6’’ extractor 1 large oscillating fan & 1 clip on fans

.6) What are the bulb wattages, kelvin ratings, and schedule?
315w x2 and 18hrs on


Your medium:
.7) Specific brand and type of soil, (coco, peat based soilless...) and anything you've added to it.

Canna Coco


. Size of container.
15l


Your nutrients and water:
.9) Source of water. (tap or filtered) What's it's ph?
Tap and ph is between 5,6 and 6.0
10) Method of checking water ph. (ph pen, test strips, aquarium test kit...)
Ph pen
11) Method of adjusting water ph. (phosphoric acid, white vinegar, hydrated lime, PH Up...)
Phosphoric acid
12) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule.

Ionic bloom 1.5 : 1.4 ; 3.1. 7ml per litre
Plant magic root stim 0.14’; 0.01; 0.12 flower stage 2.5ml per litre

Atami Bloom Bastic pk 14-15
Content phosphorus pentoxide 14% (6.10% soluble in water)
Potassium oxide 14.50%(12.03% soluble In water)
Magnesium oxide 0.37% (0.22% soluble in water)
Sulphur trioxide 0.45% (0.18%soluble in water)
Iron 0.950%





13) How often are you watering between feedings, and how much per watering?
2-3 litres. Every 2-3 days give or take depends on if pots are dry or not
14) Any additives or tea's? (Superthrive, CalMag, molasses, Mother's Earth...)
No
15) Are your ph levels stable, or do they fluctuate?
5.7 - 6.0
16) What is your ingoing water's ph? ...your runoff ph?
Ph is between 5,9 and run of from that feed was 7.7 on one plant then 7.4 on the other

17) Do you foliar feed? If so, with what, how often, and at what time do you spray?
No
Your growroom:
1 Indoors or outdoors?
Indoors
19) What size of closet, room or hut?
Tent of 1.2x1.2x 2m
20) What are the temps and humidity levels while lights are on? ...With lights off?
Lights on at top of plants is 26c pot level is 20 and lights off 18
21) Have you seen signs of insects in the growroom?
No

Your strain:
22) What strain are you growing? (Indica dominate or Sativa dom?)
Indica
23) Is this an photoperiod strain?
Auto flower
24) How old is the plant? 6 weeks flower
25) In what life-cycle is it? Vegetative, pre-flowering, flowering, rippening?
Flower
26) From seeds or clones?
Seeds

I have since changed too 2x omega 315w cdm pro digital dimable (2days ago)
Temps at pot height are 20c
Plant tops is 26c

First pictures is Purple Kush auto flower which is about 10 days in front of the other plant
The one that is 10 days behind just seems too not smell as much and feels really drynot sticky at all like the other one. The ph run off is 7.2-7.4 I flushed with about 10 gallons of 5.8 phd water and still no change plant looks to have nute lockout? Any ideas anyone ???


I think I have covered what you guys are going to ask if not please let me know!Appreciate any help given kind regards

could be wrong im still kind of new to growing but wanted to say this looks absolutley normal to me, usually towards the end of the flower cycle your leafs start turning yellow and dying off.

"Bloombastic is an ORGANIC BASED PRODUCT containing sea kelp and clay minerals"....this isn't conducive to a coco grow, which may be why you're experiencing the higher pH runoff. Otherwise, it's hard to see how you're running that much 5.8 pH water through your medium (coco) and it's not taking on that same relative pH. I would also look at your IonicBloom component; you're adding 7ml per liter, and the manufacturer suggests 5ml. Perhaps you're overdoing it?

CannaCountry said:

" you're adding 7ml per liter, and the manufacturer suggests 5ml. Perhaps you're overdoing it?

Click to expand...

Yeah that's what I thought first too but the actual chart says 7ml per ltr in bloom.

However I think cutting it down and feeding more often will help the OP.
Allowing coco to dry out fully with a high EC feed will just leave a lot of salt build up. That will throw the ph off, although generally speaking chasing run off ph in coco is a waste of time, that high a run off would have me worried.

Likely a lock out due to salt build up.

OP more waterings with lower feed, go slowly and get 15-20% run off to ensure full saturation and lower chance of salts building up.

And don't let your coco dry out completely...it will cause you issues.

More than likely it's the source water that's causing the problem. What size rez are you using and do you check the pH several hours after you mix it or do you just pH then feed ?

CannaCountry said:

"Bloombastic is an ORGANIC BASED PRODUCT containing sea kelp and clay minerals"....this isn't conducive to a coco grow, which may be why you're experiencing the higher pH runoff. Otherwise, it's hard to see how you're running that much 5.8 pH water through your medium (coco) and it's not taking on that same relative pH. I would also look at your IonicBloom component; you're adding 7ml per liter, and the manufacturer suggests 5ml. Perhaps you're overdoing it?

Click to expand...

I’ve used bloombastic before in the past with coco with no problems, although this is my first ever run of auto flowers all my other plants are healthy not a spot of yellow or any deficiency’s has my head battered!!!! Manufactures dose is 7ml it says on the bottle but I never give 7ml anyway. Il cut back on the feed see if that helps

Update think I figured out the problem my ph pen was way out, now reading correctly should I flush it with correct ph now ? I’ve posted a pic of a leaf is this phosphorus def ? Week 7 of flower as well is this going to affect my yield

magnesium more likely flush with a bit more acidic it will come out at a value somewhere in between the two points.

StinkyBuds said:

13) How often are you watering between feedings, and how much per watering?
2-3 litres. Every 2-3 days give or take depends on if pots are dry or not

Click to expand...

Depending on how big your pots are, you shouldnt let coco get dry. If you do the pot lifting technique, first water then weigh the pot by lifting it, REMEMBER HOW IT WEIGHS. When you should water again is when your lift the pot and it weighs half of what it was when you first watered. Coco coir (used by itself) is considered a hydroponic medium and if you treat it like soil you will suffer what you are going through. The coco should always remain moist.Setting up a drip system should help with constant waterings. Good luck!