Urgent help needed. Calcium deficiency or nute lock out??

Hi people
it has been quite a long time since I have posted anything so I hope you all are doing alright and all of your plants are growing healthy.

I have 3 plants.
Strain is Deimos autoflower and each of them growing in 20 liter soil(bio bizz Light mix) with 200 w. Migro lights LED hanging 25 cm. up on them
Room size 60x120x180
Temp. is 26 celcius degree and humidity is around %55
Base nutrients are General Organics Thrive for veg. and Bloom for flowering stage.
Also have AN tarantula, voodoo juice for roots. AN big bud and overdrive for late flowering stage.
They are 52 days old in total and 3 weeks into flowering stage and I am currently watering them 1.5 liter of water for each with General Organics Bloom (2ml p/l) and AN big bud (1.5ml p/l) Ph'ed between 6.2-6.6

I unfortunatelly have detected some yellow/brown parts on the leaves few days ago and the discolorization maintains especially with the leaves near the top side of the plants

Is anybody have an idea if the issue is calcium deficiency or maybe any kind of nute lock due to imbalance Ph.

Any help would be very apperaciated. Thanks in advance

I'd say PK deficiency pretty bad

do you ph down every watering?

Redskare87 said:

do you ph down every watering?

Click to expand...

Yes I always adjust final ph between 6.2-6.6 but unfortunatelly can't measure soil's Ph as I don't have the equipment for it

BobThe420Builder said:

I'd say PK deficiency pretty bad

Click to expand...

And what would your recommendation for fixing it?

if youre feeding enough P and K and it’s deficient, then your ph is low for sure, causing it. Under 6.5 starts making P less available and they eat a lot during flower. I wouldn’t ph every watering because it will trend lower and lower. Top dress 1/4cup of dolomite

and use less ph down

Look at all those nutes and find a PK booster
And add it

Redskare87 said:

if youre feeding enough P and K and it’s deficient, then your ph is low for sure, causing it. Under 6.5 starts making P less available and they eat a lot during flower. I wouldn’t ph every watering because it will trend lower and lower. Top dress 1/4cup of dolomite

Click to expand...

Thanks a lot

BobThe420Builder said:

Look at all those nutes and find a PK booster
And add it

Click to expand...

Thank you

Redskare87 said:

if youre feeding enough P and K and it’s deficient, then your ph is low for sure, causing it. Under 6.5 starts making P less available and they eat a lot during flower. I wouldn’t ph every watering because it will trend lower and lower. Top dress 1/4cup of dolomite

Click to expand...

And 1 more thing
Do you think I need to flush in order to make the ph being fixed? Or Just feed them without ph down

kidcrash said:

And 1 more thing
Do you think I need to flush in order to make the ph being fixed? Or Just feed them without ph down

Click to expand...

I think that would help a lot and it would be a quicker way to stabilize the ph. I would too dress Dolomite and then pour about double the water you usually use, but use plain water preferably neutral ph, and next feed just add nutrients to the plain water and don’t add ph down, I never use that shit in soil anymore, when I did I’d always see yellowing and deficiencies

Redskare87 said:

I think that would help a lot and it would be a quicker way to stabilize the ph. I would too dress Dolomite and then pour about double the water you usually use, but use plain water preferably neutral ph, and next feed just add nutrients to the plain water and don’t add ph down, I never use that shit in soil anymore, when I did I’d always see yellowing and deficiencies

Click to expand...

Flushing atm. I checked the runoff and it was 5.9-6.0. Ph is the bitch proved one more time lol. Thank you so much

kidcrash said:

Flushing atm. I checked the runoff and it was 5.9-6.0. Ph is the bitch proved one more time lol. Thank you so much

Click to expand...

Oh yeah it is! I’ve been there and have completely moved away from PH adjusters totally and always amend with lime and rock dust. after you’re done, possibly put a fan blowing over your medium to dry it ina few days so you can feed sooner, using plain water and nutes. Cheers

Redskare87 said:

Oh yeah it is! I’ve been there and have completely moved away from PH adjusters totally and always amend with lime and rock dust. after you’re done, possibly put a fan blowing over your medium to dry it ina few days so you can feed sooner, using plain water and nutes. Cheers

Click to expand...

Yeah man Thank you big time!

If all you're feeding is the GO Bloom and AN Big Bud neither of those has any calcium in it. Big Bud is very high in phosphorus and potassium so you can't have a deficiency of either of those. You don't need another bloom booster that's what Big Bud is. If anything you're feeding too much P/K causing nutrient antagonism. Excess of both P/K can lockout calcium and other nutrients. pH can effect nutrient uptake as well. I don't understand why so many people mix and match products from different companies or the need for all these additives. A balance feed from start to finish is all you need to have healthy plants the entire grow.

It's like half the posts on here are from people having nutrient issues using cannabis specific nutrients. If they're cannabis specific then why do so many people have issues? Don't be fooled by fancy labels and cool sounding names. You don't need any of that to have excellent results growing weed. Jacks, Masterblend, and many other non-cannabis specific nutrients yield excellent results with none of these problems so many seem to have using all these bottles of cannabis specific nutrients. Dumping all that stuff into your soil can throw everything off and lead to unhappy and unhealthy plants.



Mulders chart - Improving crop yield
In 1953, D. Mulder published his “Les elements mineurs en culture fruitière”, the "Mulder chart" is one of the first studies of how different nutrients interact. The study included a graph, which is now commonly used. Over the years, other researchers have added other possible synergies and antagonisms. Clearly, studying the interactions between nutrients is essential for improving crop yield.

xtsho said:

If all you're feeding is the GO Bloom and AN Big Bud neither of those has any calcium in it. Big Bud is very high in phosphorus and potassium so you can't have a deficiency of either of those. You don't need another bloom booster that's what Big Bud is. If anything you're feeding too much P/K causing nutrient antagonism. Excess of both P/K can lockout calcium and other nutrients. pH can effect nutrient uptake as well. I don't understand why so many people mix and match products from different companies or the need for all these additives. A balance feed from start to finish is all you need to have healthy plants the entire grow.

It's like half the posts on here are from people having nutrient issues using cannabis specific nutrients. If they're cannabis specific then why do so many people have issues? Don't be fooled by fancy labels and cool sounding names. You don't need any of that to have excellent results growing weed. Jacks, Masterblend, and many other non-cannabis specific nutrients yield excellent results with none of these problems so many seem to have using all these bottles of cannabis specific nutrients. Dumping all that stuff into your soil can throw everything off and lead to unhappy and unhealthy plants.

Mulders chart - Improving crop yield
In 1953, D. Mulder published his “Les elements mineurs en culture fruitière”, the "Mulder chart" is one of the first studies of how different nutrients interact. The study included a graph, which is now commonly used. Over the years, other researchers have added other possible synergies and antagonisms. Clearly, studying the interactions between nutrients is essential for improving crop yield.

Interactions between nutrients | CANNA CANADA

Most growers know the importance of applying the right amount of macro- and m

www.canna.ca

Click to expand...

Moulders chart kicks ass

Redskare87 said:

Moulders chart kicks ass

Click to expand...

It's not the holy grail but provides some insight into how the different nutrients work together or against each other. Excessive phosphorus and potassium which seems to be common with cannabis growers can prevent other needed nutrients from being available to the plant. And that is what leads to many of these issues so many have.

Mixing and matching nutrients should not be done unless the grower has an understanding of what they're feeding their plants and how to combine different products which is why using just a balanced fertilizer or even just the complete base of a 2 - 3 part is a better method. You really need to understand plant nutrition and read the labels of the products as they don't all put everything in just one bottle and split it up into several and when mixing products you could very well be leaving something out.

For instance, the GO Bloom is supposed to be used with CalMag because it has no calcium and just a tiny amount of magnesium. The GO Grow has no calcium either. None of the products @kidcrash listed contain any calcium and just small amounts of magnesium. Both of those are extremely important for healthy plant development. Unless they just failed to list CalMag those plants have been deprived of a couple critical elements.

Lol, I’ve always kind of taken a back when people are trying to diagnose plants issues and they list like 15 different fertilizer products that they somehow fit into their feeding routine. I’m curious to know how many plant problem threads are actually nutrient Imbalance, it’s gotta be at least 30%... yeah Go B really should have cal mag in it, but two sales is always better then one, and hell let’s split it up into 26 separate bottles we can sell! Damn corporate bastards!