PH is rising

A

Autoflowering grower

Active Member
I’m using advanced nutrients connoisseur coco. I’m growing in cultivation nation. The PH going in is 5.9-6.1, but the run off PH is 6.7-7.0. This is causing my plants to lock out nutrients. I have flushed with plain 5.8 ph water mixed with cal mag & coconut water about 250 ppm. Then run nutrients through them again. I checked the PH every time I ran a gallon of water through. The PH would continually rise close to 6.8-6.9. Can anyone tell me what is causing this. This is a drain to waste grow.
 
Rurumo

Rurumo

Well-Known Member
This commonly happens if you're using tap water with a high alkalinity. Like myke says, it's not an issue unless you see problems. Your plants are able to absorb nutrients throughout the 5.8-7.0 range, honestly, exposing them to a range of PH is a good practice in hydro. Are you seeing any problems with your plants? I've heard that FoxFarm coco can start with very high PPMS, so any problems you are seeing could be related to that, if you didn't flush it before you started. By "flush" I mean, run plenty of .8 ec nutrient solution through it to wash out any extra salts that some brands of coco start with.
 
A

Autoflowering grower

Active Member
And yes cultivation nation does need to be rinsed. I didn’t at 1st but because I didn’t want to over water & had already planted the seed. And the plants looked fine until I tried to flush the salt build up out of it. I have been running about 0.7 ec through them this morning.
 
myke

myke

Well-Known Member
Up your food EC to 1-1.5 ish. Ro water so 5ml/gallon calmag. Should green them up. You flush every time you feed so don’t bother with straight water. Feed every day to a good amount of runoff and all will be good.
 
Star Dog

Star Dog

Well-Known Member
You have some other problem if your input ph is around 6.0, what runs our is completely irrelevant what makes you think it's causing lock out?
 
A

Autoflowering grower

Active Member
myke said:
Up your food EC to 1-1.5 ish. Ro water so 5ml/gallon calmag. Should green them up. You flush every time you feed so don’t bother with straight water. Feed every day to a good amount of runoff and all will be good.
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I have been running nutrients through everytime with 15% runoff,until I saw the leaves yellowing, then I flushed. These plants are autos, 2 & 3 weeks old. Do you think they need more nutrients? What I’ve been giving them is 0.6 - 0.7 ec.
 
myke

myke

Well-Known Member
Autoflowering grower said:
I have been running nutrients through everytime with 15% runoff,until I saw the leaves yellowing, then I flushed. These plants are autos, 2 & 3 weeks old. Do you think they need more nutrients? What I’ve been giving them is 0.6 - 0.7 ec.
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Yup. Above 1 EC at least.
 
jondamon

jondamon

Well-Known Member
Autoflowering grower said:
I have been running nutrients through everytime with 15% runoff,until I saw the leaves yellowing, then I flushed. These plants are autos, 2 & 3 weeks old. Do you think they need more nutrients? What I’ve been giving them is 0.6 - 0.7 ec.
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This is taking 0.7EC with 0.2 source water and it’s 1 plant in 2 gallons of coco being fed every 2 hours.

if you’ve mentioned it excuse me asking but how often are you feeding?

every few days?


5A8C9E87-6ABB-4127-BA8A-C022238972AE.jpeg
 
A

Autoflowering grower

Active Member
jondamon said:
This is taking 0.7EC with 0.2 source water and it’s 1 plant in 2 gallons of coco being fed every 2 hours.

if you’ve mentioned it excuse me asking but how often are you feeding?

every few days?


View attachment 5053102
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2 times a day now but they are just now 2 weeks the smallerone, & 3 weeks on the bigger. It was once a day for the 1st 14 days & I didn’t completely saturate the pots until they was 14 days old. But there was salt build up or whatever. In the cultivation nation coco straight out of the bag. I didn’t flush it until 14 days. Do you think that could be the problem? I have flushed now until 0.8 ec in & the same coming out. PH run off is also the same in/out. I work and I’m gone for 12-13 hours a day. So 2 times a day is the most I can feed without going automated.
 
jondamon

jondamon

Well-Known Member
Autoflowering grower said:
2 times a day now but they are just now 2 weeks the smallerone, & 3 weeks on the bigger. It was once a day for the 1st 14 days & I didn’t completely saturate the pots until they was 14 days old. But there was salt build up or whatever. In the cultivation nation coco straight out of the bag. I didn’t flush it until 14 days. Do you think that could be the problem? I have flushed now until 0.8 ec in & the same coming out. PH run off is also the same in/out. I work and I’m gone for 12-13 hours a day. So 2 times a day is the most I can feed without going automated.
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Don’t ever worry about pH out you cannot successfully test coco’s pH by testing its runoff.

If I was in your situation I would be continuing at the current EC and feeding twice a day as you are and watch for any further improvement over the next 7 days.
 
A

Autoflowering grower

Active Member
jondamon said:
Don’t ever worry about pH out you cannot successfully test coco’s pH by testing its runoff.

If I was in your situation I would be continuing at the current EC and feeding twice a day as you are and watch for any further improvement over the next 7 days.
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At how many weeks do you start fully saturating the coco, (to run off)? I try to wait until 10-14 days out of the ground. As to not overwater in seedling stage. Which was what caused my problems in the 1st place because I didn’t flush before planting the seeds, at least that’s what I think happened. What is a good coco perlite mix that isn’t high in salts straight out of the bag or do you have to rinse all brands of coco. I have heard royal gold coco tupur is a good coco to do drain to waste. What is your opinion?
 
jondamon

jondamon

Well-Known Member
Autoflowering grower said:
At how many weeks do you start fully saturating the coco, (to run off)? I try to wait until 10-14 days out of the ground. As to not overwater in seedling stage. Which was what caused my problems in the 1st place because I didn’t flush before planting the seeds, at least that’s what I think happened. What is a good coco perlite mix that isn’t high in salts straight out of the bag or do you have to rinse all brands of coco. I have heard royal gold coco tupur is a good coco to do drain to waste. What is your opinion?
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I’ve never rinsed any prebuffered coco from the bags.

personally I use CANNA although the plant above has been grown in brick that I hydrated with plain tap water and began feeding.

i feed every time they need to be watered and during the early seedling stage I wait for the coco to lose some weight before feeding again and saturate the entire pot until runoff.

once my plants are becoming light in weight every day I transplant to a larger pot and begin with daily feeding that is automated.

i increase feeding each week until I’m around 2-5x a day depending on pot size. (Plant above is in 2Gallons)

l have just switched my feeding last night from every 2 hours to every 3 hours as the plant drinks less towards later flower.

10-14 days to start daily feeding is about right Imo.

i grow in straight coco if you mix in perlite (too much +30% or more) it can drain too fast needing more frequent feeding.
 
A

Autoflowering grower

Active Member
jondamon said:
I’ve never rinsed any prebuffered coco from the bags.

personally I use CANNA although the plant above has been grown in brick that I hydrated with plain tap water and began feeding.

i feed every time they need to be watered and during the early seedling stage I wait for the coco to lose some weight before feeding again and saturate the entire pot until runoff.

once my plants are becoming light in weight every day I transplant to a larger pot and begin with daily feeding that is automated.

i increase feeding each week until I’m around 2-5x a day depending on pot size. (Plant above is in 2Gallons)

l have just switched my feeding last night from every 2 hours to every 3 hours as the plant drinks less towards later flower.

10-14 days to start daily feeding is about right Imo.

i grow in straight coco if you mix in perlite (too much +30% or more) it can drain too fast needing more frequent feeding.
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Good information. Thank you. I have used canna before but quit because it was more expensive. But I know that you get what you pay for.
 
calvin.m16

calvin.m16

Well-Known Member
I used AN for 2 years or more until I realized with RO (Reverse Osmosis) water CYCO nutrients comes out to 5.7-5.8 PH with no adjustment using a similar feed to this except I do add in their Supa Stiky additive mid-bloom when I switch to Swell.
1640707067355.png

You could cut out the supa stiky if you wanted but I actually noticed an improvement on Rosin yields when pressing the nugs. I used to just run Potash for the first 20 days of bloom then switch to Swell until the start of flush. Feed full strength per their chart start to flush. "flush" is just plain water for 7 days once the plants are about ready to harvest.

When using AN in 10 gallon pots of coco it was a nightmare keeping the PH stable and avoiding that dirty burning on the leaves never went away even at almost half strength of what they recommend...
 
OldMedUser

OldMedUser

Well-Known Member
I've used AN for 20 years in DWC, soil and soilless blends and the first rule of using pH Perfect nutes is don't fuck with the pH.

I've never used coco but that rule should still apply.

The problem here is too low EC. .7 with the base water being .2 is only .5 nutes or 250ppm. I give sprouts and freshly rooted clones at least 300ppm to start with. Aim for 1.2 at minimum so you have at least 500ppm of actual nutes in there.

Feed it more and stick the pH pen somewhere you won't be tempted to play with it. Trust the damn tech and feed your starving plants!

:peace:
 
calvin.m16

calvin.m16

Well-Known Member
OldMedUser said:
I've used AN for 20 years in DWC, soil and soilless blends and the first rule of using pH Perfect nutes is don't fuck with the pH.

I've never used coco but that rule should still apply.

The problem here is too low EC. .7 with the base water being .2 is only .5 nutes or 250ppm. I give sprouts and freshly rooted clones at least 300ppm to start with. Aim for 1.2 at minimum so you have at least 500ppm of actual nutes in there.

Feed it more and stick the pH pen somewhere you won't be tempted to play with it. Trust the damn tech and feed your starving plants!

:peace:
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What about the fried tips and burnt leaves?
 
OldMedUser

OldMedUser

Well-Known Member
calvin.m16 said:
What about the fried tips and burnt leaves?
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Low K and a couple others cause that as a symptom too. I'm mainly looking at that pale one and seeing a starving plant.

Trying to adjust the pH of pH Perfect nutes screws them right up and basing treatment on runoff pH is the road to ruin. It's just a balpark number and most people don't know how to do it right to at least stay in the ballpark. Totally unreliable.
 
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