Yellowing new growth and signs of most deficiencies

Hi everyone and thanx for a wealth of information.
I hope I am posting in the right place.
I have a few plants that for the first 3 to 4 weeks looked like they were going well, if a little small.
I made a mix of bunnings coco x 10 parts, humus potting mix x 2 parts, pearlite x 3 parts and blood and bone mix x 1/4 part.
I am using a marshydro 960 watt and until now have been watering with ph 6 water.
In the last 2 to 3 weeks I have been trying to get on top of an issue that seems to be getting worse.
It started with leaf tip browning and then leaf yellowing with green veins and now I have some serious browning and curling.
I got a soil ph tester 2 days ago and found my soil in all pots was above 7. And I also guessed that I had nute lockout so I gave the a light sprinkle of dollamite lime dust and flushed the with water at ph 5.5 .
The next day they appeard a lot healthier as in standing up and holding the leaves level.
But the new growth still seems to be yellowing on the second day and the ph is up ove 7 again.
Can anyone tell me what is wrong and should I flush them again ?

You're going to have nothing but problems with that mix you threw together to grow in. Lime raises the pH of soil and you're adding that and flushing with 5.5 pH water. What are you trying to do? It's not working. I recommend getting a decent soil and transplanting those into it. Or just go straight coco and basic nutes. That's all I got. I wouldn't even bother chasing the problems you're having in that growing mix.

Good luck

The perfect temperature and humidity for your plants are found between 75°-85°F and 50% - 70% humidity, with plenty of airflow to replenish CO2. PH is 6-6.5. You may add more calcium and magnesium than normally needed, but less water and nutrients with led grow light .

Thanx for the advice people, I got given the light on loan and a few seeds to ease the cost burden of easing a sick partner's suffering.
Never done this before and suffering from information overload.
The simple path sounds like the best to me I will transplant to coco and use cana classic flores A until bloom time. What do you think ?

I would transplant those into three gallon pots of coco. Pre-charge the coco with half strength nutes. Squeeze out the moisture so it's damp not soaking wet. Fill half the pot with coco. Get a bucket of lukewarm water. Take those plants out of the pots. Swish them around in the water to remove most of the soil. Put in the pots with coco. Fill the pot with more coco to bury the roots of the plant. Leave alone for a couple of days. When the coco starts to dry out on top give them a watering of half strength nutes. Wait until they start to look better and then start normal watering/feeding.

Now it's possible that those plants won't survive that process but that's what I would do. At this point they are not looking good. I'm sure there are some that will say give it some calmag, flush it with five times the volume, give it a foliar feeding of epsom salts, etc... But all you're going to end up doing is chase one problem after another.

The issue is that mix you made. There is nothing wrong with making your own soil but it requires more than just throwing some stuff together if you want good results.

One thing I see is that you thought that you say you had a high pH. Adding dolomite lime actually raises the pH because it's alkaline. And then you flushed with 5.5 pH which is acidic on the pH scale. That grow medium looks really saturated from flushing and those plants are not healthy enough or big enough to drink up all that moisture. The plants are sitting in really wet soil. The roots are likely drowning. They won't grow under those conditions.

Anyway, that's what I would do. Others are free to offer their own advice.

Also, if you use Canna Classic you're going to want to use the Canna Classic Veg A & B for the vegetative growth period. The flora is for bloom and it's part A & B as well.

Good luck.

buslin said:

Hi everyone and thanx for a wealth of information.
I hope I am posting in the right place.
I have a few plants that for the first 3 to 4 weeks looked like they were going well, if a little small.
I made a mix of bunnings coco x 10 parts, humus potting mix x 2 parts, pearlite x 3 parts and blood and bone mix x 1/4 part.
I am using a marshydro 960 watt and until now have been watering with ph 6 water.
In the last 2 to 3 weeks I have been trying to get on top of an issue that seems to be getting worse.
It started with leaf tip browning and then leaf yellowing with green veins and now I have some serious browning and curling.
I got a soil ph tester 2 days ago and found my soil in all pots was above 7. And I also guessed that I had nute lockout so I gave the a light sprinkle of dollamite lime dust and flushed the with water at ph 5.5 .
The next day they appeard a lot healthier as in standing up and holding the leaves level.
But the new growth still seems to be yellowing on the second day and the ph is up ove 7 again.
Can anyone tell me what is wrong and should I flush them again ?

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I agree with above, you need to transplant them into something else.

Be wary about coir as well, it's often pretty salty, and looks a little that way to me.

I buy coco from bunnings as well (it's a 10th of the price of a hydro store). But it never comes properly rinsed or buffered. It says it does but it doesn't, ever.

It's exactly what salty coir does too, jacks the ph up over 7 causing huge swings, and dries the plants out, nutrient deficiency etc.
Usually in the form of calmag issues, it attaches straight to the salt, especially the sodium and locks out.

Seeing sodum and calcium are similar metals and ions of both carry a positive charge they aren't attracted to each other. The sea salt in coco, mostly sodium chloride, basically poisons the plants. That was my fist experience with coco almost 20 years ago. Cheap brick that I didn't know to rinse so rehydrated with RO water, added perlite and stuck plants in it. Wasn't pretty I'll tell you what.

Can't really get coco but ProMix is available all over. I hear they make great coco blends too that are ready right out of the bale like the ProMix HP I love. Fill a pot, add plant and water in with nutes. Great stuff.

Aussieaceae said:

I agree with above, you need to transplant them into something else.

Be wary about coir as well, it's often pretty salty, and looks a little that way to me.

I buy coco from bunnings as well (it's a 10th of the price of a hydro store). But it never comes properly rinsed or buffered. It says it does but it doesn't, ever.

It's exactly what salty coir does too, jacks the ph up over 7 causing huge swings, and dries the plants out, nutrient deficiency etc.
Usually in the form of calmag issues, it attaches straight to the salt, especially the sodium and locks out.

Click to expand...

Yeah bad coir is not good. Years ago I would rinse the stuff with a garden hose. Now in the US you can get it ready to go. Ten years or so ago it was some nasty salty stuff. Full of sand and crap. The good places source their product properly and have the suppliers maintain it better than they used to. Then they rinse and buffer it making it ready to go. If they didn't they couldn't charge the prices they do.

I used to get these 25 kg bales of compressed coco when I first started using it years ago. That stuff had to be rinsed and it was full of sand and plastic garbage you'd have to pick out. There would be a half pound of sand on the bottom of the tote you used to re-hydrate it. Now they realize the money in coco and are treating it better. I don't know anything about Bunnings. It's not available here but it's possible that it's a low grade coco and if so would be full of salt and could cause issues like you're experiencing. It would probably be a good idea to rinse it really good before using.

Hi and thanx again for all the great advice,
Just to clarify the only reason I used the lime was because it was the only form of calmag I could get until my order was delivered from ebay.
I'm sure the advice from the nursery person to use it was only because I couldn't give them the complete information or show them the plant.
And you are right even though the girls health improved after the dust and flush the ph was back to 7.2 and climing within 36 hours.
I bought the coco and pearlite (the coco guarantees on the pack that it is the bees knees ) LOL.
I couldn't find those breathable pots so another trip to the nursery tomorrow for some cheap plastics until delivered from ebay
So lots of flushing the new coco tomorrow, then I'll do a gentle replant. I also bougt them a thermostatically controlled heater as per grow for fun's advice.
Will get a couple more pics before the transplant tomorrow thanx everyone.
P.S. What is buffering ??? And how do you do it ?

buslin said:

Hi and thanx again for all the great advice,
Just to clarify the only reason I used the lime was because it was the only form of calmag I could get until my order was delivered from ebay.
I'm sure the advice from the nursery person to use it was only because I couldn't give them the complete information or show them the plant.
And you are right even though the girls health improved after the dust and flush the ph was back to 7.2 and climing within 36 hours.
I bought the coco and pearlite (the coco guarantees on the pack that it is the bees knees ) LOL.
I couldn't find those breathable pots so another trip to the nursery tomorrow for some cheap plastics until delivered from ebay
So lots of flushing the new coco tomorrow, then I'll do a gentle replant. I also bougt them a thermostatically controlled heater as per grow for fun's advice.
Will get a couple more pics before the transplant tomorrow thanx everyone.
P.S. What is buffering ??? And how do you do it ?

Click to expand...

Just get some House and Garden or Canna coco, its pre buffered ready to use straight out the bag no fucking around . Mix it 70/30 with perlite and its right to plant.

Try to transplant them into canna coco, see if there is any difference then.

buslin said:

Hi and thanx again for all the great advice,
Just to clarify the only reason I used the lime was because it was the only form of calmag I could get until my order was delivered from ebay.
I'm sure the advice from the nursery person to use it was only because I couldn't give them the complete information or show them the plant.
And you are right even though the girls health improved after the dust and flush the ph was back to 7.2 and climing within 36 hours.
I bought the coco and pearlite (the coco guarantees on the pack that it is the bees knees ) LOL.
I couldn't find those breathable pots so another trip to the nursery tomorrow for some cheap plastics until delivered from ebay
So lots of flushing the new coco tomorrow, then I'll do a gentle replant. I also bougt them a thermostatically controlled heater as per grow for fun's advice.
Will get a couple more pics before the transplant tomorrow thanx everyone.
P.S. What is buffering ??? And how do you do it ?

Click to expand...

"If you have coco coir that is unbuffered, you can add calcium and magnesium supplements yourself, by rinsing the media with a solution of water, calcium and magnesium, or other nutrients that your particular crop may need an abundance of."

http://blog.botanicare.com/when-to-rinse-or-buffer-coco-coir/

You got PH lockout badly, probably toxicity also. High PH lime and than Acidic water in the same pot, there's no telling what kind of crazy chemical shit it's doing.

High again and thank you to those who offered advice,
Grow for fun I think you were dead on the money with your heat humidity and airflow sugestion. when the heat and humidity were addressed the plants started improving straight away.
Xtsho even though the heat and humidity seem to have addressed the problem I am taking your advice with the medium, it just makes sense to keep it simple so washed some new coco choir and added plenty of pearlite and I have started to transplant to the clean mix with only 30% dose of the sugested solution of calmag and a couple of drops of nutes in a 1 liter flushfor each pot (3 done so far ).
Too much water and too cold a room seem to have been the main problem, I don't think the ph of 7 was too much to blame. Most of the improvement was gained just buy warming them up and leaving them alone.
Owsley definately a nute lockout from the cold and high ph combo.
Thank you all once again for your excellent sugestions and a couple of picks showing the speed of improvement so far.
Will post a couple more after they have settled from the transplant.

buslin said:

Hi everyone and thanx for a wealth of information.
I hope I am posting in the right place.
I have a few plants that for the first 3 to 4 weeks looked like they were going well, if a little small.
I made a mix of bunnings coco x 10 parts, humus potting mix x 2 parts, pearlite x 3 parts and blood and bone mix x 1/4 part.
I am using a marshydro 960 watt and until now have been watering with ph 6 water.
In the last 2 to 3 weeks I have been trying to get on top of an issue that seems to be getting worse.
It started with leaf tip browning and then leaf yellowing with green veins and now I have some serious browning and curling.
I got a soil ph tester 2 days ago and found my soil in all pots was above 7. And I also guessed that I had nute lockout so I gave the a light sprinkle of dollamite lime dust and flushed the with water at ph 5.5 .
The next day they appeard a lot healthier as in standing up and holding the leaves level.
But the new growth still seems to be yellowing on the second day and the ph is up ove 7 again.
Can anyone tell me what is wrong and should I flush them again ?

View attachment 4332958 View attachment 4332959 View attachment 4332960 View attachment 4332961 View attachment 4332962 View attachment 4332963

Click to expand...

With a ph above 7..dolomite lime isn’t going to do a whole lot for it. Also, it takes a lot longer than you think to change the ph of the medium itself. You can go ahead and keep dumping 5.5 water through until your heart is content but that ph ain’t going anywhere fast. Ditch the soil mix and nutes. Go with something tried and true

buslin said:

Thanx for the advice people, I got given the light on loan and a few seeds to ease the cost burden of easing a sick partner's suffering.
Never done this before and suffering from information overload.
The simple path sounds like the best to me I will transplant to coco and use cana classic flores A until bloom time. What do you think ?

Click to expand...

forget the coco. You want more problems than go with coco, but I’d recommend some Promix and castings. Dolomite lime a tablespoon per gallon mixed in well.

Ok thought I'd better let people who were helping know what was happenning.
I have not been able to do much more than the bare essentials until now.
My partner's health continued to decline and she passed away a week ago last saturday.
The Marijuana made her journey so much easier, for that I am grateful.
One beautiful lady supplied her with free bud and another friend supplied her at less than half price.
In the last couple of days I have continued using water at or slightly below 5.5 ph
I have seen more growth in the last couple of days than in the weeks I have been trying to get it right.
All the deficiency problems seem to have disappeared.
This makes sense since the choir or coco medium seems to behave more like hydro than dirt.
They are enjoying a good flush every 2 to 3 days at ph 5.5 which rises back to 7 by the time they need water again.
I have learnt that temperature, PH and air play a huge part in the plants health and growth.
Now I need to work out the correct nute dosing to keep them happy.
I will transplant them in the next couple of days to bigger pots.
Sorry about the shitty photo just showing the difference until I get some time in daylight to get a good shot.
Also noticed I should be able to sex them now but didn't have my glasses with me.

Back again with the pics I promised.
Also danjac82, I live in australia and can't get most of the products you and others talk about here
because they don't exist here or will take weeks to get shipped if feasable.
It seems the only problem the coco or choir has caused is it constantly rises to ph 7.
This locks out the nutes and makes the plants appear to have deficiencies and / or overdose of same nutes.
The quick flush at ph 5.5 seems to be holding the problems at bay at the moment.
It appears I will have to go plastic pots for the next stage as the material ones have not arrived.
After checking the photos below can anyone give me a good program to follow to keep these girls happy and healthy.
I am a little worried about continuing the watering with no nutes.
How do you know what and when to give the different nutes.
I already have part B cana flores and a few other nute types.
I am waiting also on a ppm meter and digital ph meter but will advise when I have them.
Lots of questions and thankyou for all your answers.

Is there any chance you can put those plants into just potting soil? and then hit them with a dose of epsom salt. Best of luck

Hi people, thought I'd better give an update.
I have been torturing these girls for nearly 10 weeks now doing everything the hard way and making all the mistakes I can.
These girls are pretty hardy to put up with me.
I have now got my room at a dry 20 deg celcius, still working on a humidity system should be up in a day or 2.
I am trying to achieve the goals grow for fun suggested and each step brings more growth.
As doublejj suggested I have transplanted to bigger pots with potting soil and dosed with epsom salts.
Before dosing one plant had started to show some brown spotting and leaf deformation or crippling.
I am leaning towards the breeze from the heater being the culprit but am open to information from someone who has had this issue.
I am thinking of pinching off the tops and switching to bloom soon so any input is appreciated.
P.S. Most of the ph problems have been caused by cheap shit chinese ph testers
Once again thanx for all the sugestions.