Do i definitely need to flush?

[hyposomniac]

Start doing slurry tests instead of runoff.
grab a core sample of your media, mix w an equal part of distilled water, mix, let it sit a few minutes and meaure ec and ph, let it sit an hour and measure again
canna describes it, slightly differently, halfway down
http://www.canna-uk.com/using_canna_coco

 

[f-e]

I have been back n forth, but don't see what soil it is. So can't really talk about the EC to use. Regardless of this, everything you need is in the ionic bloom. Any modification to this with bottles of other stuff, should only be done if the plant actually asks you to. In fact, you should only use the ionic bloom if the plant asks you to.

With big containers meant to last on water alone, you might correct an unexpected problem, or tailor the feed profile such as changing the PK quantities for flower. Where little containers are used, you know everything will run out, before even getting out of veg perhaps. Or with a light mix, it can need help from day one. In these cases a full range nutrient is used. Such as the Ionic. Which I have used with both light and heavy mixes. The smaller pot, supplemented with a balanced feed each watering, acts like a big pot. There is no water only days, or fertilising, it's fertigation. A Constant replenishment due to having insufficient levels coming from the soil alone.

You could possibly read that last paragraph again. You are doing something very different. Which won't work.

How is your tap water? If it's really soft then you can almost forget the feeds pH.

 

[f-e]

Looking at your pictures, I'd say just relax, the problem is not too bad. If I was you, I'd just lay off all the nutrients and concentrate on watering the rest of the run. The plants are looking fairly big for their containers, so you can stop worrying about over watering. It won't happen. In fact, I'd put some bug runoff trays and let them sit in enough that it takes a few hours for them to re absorb it. That way you'll get maximum yield. Remember, other than the main factor; genetics, it's water that limits yield, not nutrients.

Nutrient salts can concentrate when the soilmix is allowed to dry out too much, that's probably where you were seeing the problem. It's hard to keep up with the rapidly changing water requirements of cannabis, it's one of the 'high kung fu's' of growing!

Indeed. A few issues that could of been pH or could be history. But seeing how dry some of the pots look, it could be the real issue. Keeping moving forward. That's good advice.

 

[greenspiritz]

I have been back n forth, but don't see what soil it is. So can't really talk about the EC to use. Regardless of this, everything you need is in the ionic bloom. Any modification to this with bottles of other stuff, should only be done if the plant actually asks you to. In fact, you should only use the ionic bloom if the plant asks you to.

With big containers meant to last on water alone, you might correct an unexpected problem, or tailor the feed profile such as changing the PK quantities for flower. Where little containers are used, you know everything will run out, before even getting out of veg perhaps. Or with a light mix, it can need help from day one. In these cases a full range nutrient is used. Such as the Ionic. Which I have used with both light and heavy mixes. The smaller pot, supplemented with a balanced feed each watering, acts like a big pot. There is no water only days, or fertilising, it's fertigation. A Constant replenishment due to having insufficient levels coming from the soil alone.

You could possibly read that last paragraph again. You are doing something very different. Which won't work.

How is your tap water? If it's really soft then you can almost forget the feeds pH.

They are in biobizz light mix, i vegged for 1 week after potting from 1 litrre pots to 5.7 litre pots then flowered them, are you saying i should feed with evey watering because the pot is too small for the plant? My water is 140ppm roughly so it's semi hard i think. I have noticed just now that all these deficiencys are showing more heavily on the larger plants, the smallest ones seem to be just getting affected with deficiencies, maybe it's underfed or under watered i'm not sure. The smaller pots have been more heavy with water during the grow though. I thought 450 -550ppm would be the right levels of nutrient for the size of these plants?

Can anyone try and help me identify what deficiency they are having? It looks like Calcium because of the spotting or mistaking it for Potassium, the larger ones are more pale looking so im thinking Magnesium also?

What do i do lol. I can't see them lasting by just feeding water for another 4 weeks they'd be dead by then i think or serious harvest diminished or not riping properly, im thinking this is purely a case of underwatering, too much additives, low PH and then lockout because of salt accumulation. I have flushed the plants and have a new start, but im concerned about the buffer now that i flushed them heavily. Should i add Dolomite lime to the top of the soil and water it into the soil to prevent ph swings?

These girls really seem hungry and consuming themselves rapidly

 

[greenspiritz]

Here's some other pictures of the other girls

These are the Critical 2.0 pheno 1, they have been getting exactly the same as everyone else at the same time, these are much larger plants and are in the same size pot 5.7 litre and the same age and much larger flowers, they are only showing nitrogen deficiency

 

[greenspiritz]

These are ChemDawg 4, again same age, same pot, same soil, same feed schedule

 

[greenspiritz]

These are Critical 2.0 pheno 2. The 3 dark ones at the bottom of the photo, again same everything, apart from that they are much smaller and have a bigger cola than the Chemdawg4

 

[greenspiritz]

Bubblegum, roulghy the same size as the Critical 2.0 pheno 2 above so much smaller than the larger ones like Critical 2.0 pheno 1 and CHemdawg4

 

[greenspiritz]

Everyone is on day 32

 

[greenspiritz]

Grand Daddy Purple, these are much smaller than the rest. The small ones in the middle are a different pheno to the other larger ones around the edge, they are from 2 different mothers

 

[greenspiritz]

Grand daddy Purple

 

[pongster]

hello brother,
beautiful pictures, thank you!

my guess is your only problem is too much variety and only one feed dosage. some plants are thriving, others are asking for more... it's just the way of life,

adjust feed for each strain or run less strains,
still, my bet is on a good harvest and pleasant smokes
not much to worry honestly,
best regards

 

[greenspiritz]

Day 39, i think they might just pull through. Thanks for the help and advice everyone, i'm going to give them 1 shot of overdrive and continue with water up to the last week then fully flush the soil and leave them 1 week to dry out and harvest

 

[panick503]

Have you ever grown cannabis becorr?

 

[greenspiritz]

Yes, just have problems with feeding schedules sometimes in soil. But i'm really OCD and prefer to grow hydroponically, i have far less issues in hydro, i prefer the accurate control. You never really know exactly what's going on in soil. That's my personal experience.

Why do you ask?

 

[troutman]

If you feed less 1/2 thru flowering you'll have less issues cleaning up your buds.

 

[greenspiritz]

A previous grow at day 30 flower, which was critical 2.0 but a different pheno, total 50 plants, 1200w, grown in westlands jacks magic, 5.7ltr pots.

Harvested a little over 16g a plant

 

[greenspiritz]

More pictures at day 30

 

[greenspiritz]

If you feed less 1/2 thru flowering you'll have less issues cleaning up your buds.

I thought feeding every watering at between 400 - 550ppm would of been ok, but these ladies didn't like it, i also think i over complicated it by using to many other additives ect.

Thanks for jumping in

 

[greenspiritz]

Have you ever grown cannabis becorr?

Why do i get the impression that this comment was insulting?