Can you confirm if this is mag deficiency?

When you post, be sure to tell us everything you do as well as pics. The problem with these forums is that people come here with real problems and questions but after being given help, they don't come back and discuss what they did and the effect. Because of this, there is very little learning and the advice given tends be repetitive and ineffective. We need to know what the grower does after being given help and the effects or people don't know if they are right or wrong.

How often and how much are you watering?

greg nr said:

How often and how much are you watering?

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Watering was all done with an expected 1/4-1/3 runoff, except flushes that I tried to see equivalent or more water out the bottom.
They've been watered twice with plain ph'd tap and filtered water from fridge.
They were fed twice, once with 1/4 strength A+B and once with 1/2.
They've been watered with about 1/3 normal volume with half strength Cal-Mag.
They've been sprayed multiple times a day with filtered/tap water mixed with half strength Cal-Mag.
They've been flushed once in small pots and once when they were up-potted, which was last night for the Kandy Kush's and the night before for the Durban Poison and Cherry Lime Haze.
None have been fed or watered since they were moved to their new homes.

I think I'm going to hold off feeding til tom, the CLH and Durban are looking fantastic with leaves flat and starting to point up. My little 300w LED doesn't have the width to support all three (oh I also put the two kush's in one 5gal pot, I know I know) so I had to raise it up a bit to make sure everybody gets some action. Which the three versus four pots also helps orientation-wise. Will let them dry out for another night and tomorrow I will do ph'd water with full strength Cal-Mag and then mix in full strength A+B nutrients.

I'll add some pics of all three pots shortly.

Here's the latest. Like I said the CLH and Durban are looking great. Still have the purple stems all over but leaves and new growth all looks phenomenal and fast. Other than the 2 or 3 with the spots that prompted this thread. Doing minimal LST on both. The Kush's...lol they look abysmal, I know haha new growth seems ok but those leaves, especially the little one, are awful and yellow. I've plucked 2 or 3 off with ease.

Sharpie for scale. Oh! And a little baby bagseed that sprouted out of nowhere since I used the soil I had tried (and thought failed) with a few bagseeds before picking up these clones! That ones got the LED on, sorry. Leaves looking good and I swear I'm seeing a pistil on it but we'll know soon enough.

Also, totally agree Pollack

id ease off the foliar feeding

no reason to be spraying them that often

foliar feeding as a rule is best if only done to correct an issue or pest and even then you need to know for sure you've diagnosed it proper before spraying

don't be spraying them all the time for no reason

and id lay off spraying the calmag

spray Epsom salt 1/2 tsp per gallon on the 2 larger plants to get the magnesium theyre asking for and then stop spraying.. your over doing it on the sprays ..to often

I spray 1x every week or two for pests or if I have a def/imbalance

also

don't flush unless its for a reason as in you've over fertilized or you have salt build up over time

don't flush just for the sake of it

if your getting good run off youll need to flush less frequently

if your not over feeding youll flush less frequently

if your under feeding flushing will just make you more def

if you where pushing the nutes heavy with high ppm you might flush 1x in two weeks

if your not over fertilizing you might flush 1 time in 4 weeks

I definitely agree I've been over spraying them, but I figured I was correcting the problem. And tbh it seems like that's worked, at least for the CLH and DP. They're flourishing. And I think I said it before, I just figured with the flushes that it would make sense to start fresh so I knew exactly what they had in there and were getting from the start of their up-potting. The only one that I intend to continue spraying, albeit less, is that little baby seedling that just popped.

To address another question, the CLH and Durban are both looking great. The Durban is at 9" from the soil and the CLH is 6" but definitely wider with more budsites. Looks like we're looking at about 6-8 weeks for both in terms of flowering. I've topped both of them once, maybe twice and I think they're fully recovered. Doing light LST on the Durban and obviously a little more with the CLH since it's spreading wider and cooperating a bit more. The Durban is sturdy! Won't let me tie down a whole lot. Anyway, I'm thinking of flipping them to flower soon, as in the next week or two. Yeah yah I know weeks in veg is not an accurate indicator, but they're about 4 week old clones at this point and I'm wondering how they'd do if I switched em over in the next week or waited another. How do you think they'd turn out?

To be honest, I'm not real concerned with the yield from the Kandy Kush's. Any guesses what I'd see from the Durban and CLH? The stems on those are real sturdy and looking fantastic other than the purple. Hopefully that can be resolved with nutes and Cal-Mag prior to the switch but don't feel it's a big deal given how healthy they seem. I guess I'm wondering about guesses on the yield with the Kush's too, but not expecting a whole lot from those obviously.

Durban is 100 to 250 grams per sq M https://www.leafly.com/sativa/durban-poison

Lucky Luke said:

Durban is 100 to 250 grams per sq M https://www.leafly.com/sativa/durban-poison

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Ya I've seen that but I don't have anywhere near a square meter, much less any real way to measure what I do have. Is that a square meter before flip to flower? I'd say it's about 9" high by about 9" wide so if I flipped it today would that be .052258 square meters? (9x9=81 converted to square meters) soo... .052258x100 or .052258x250 on the high end. So 5-13 grams? That seems really low. Am I doing that correctly?

noobgrowr said:

Ya I've seen that but I don't have anywhere near a square meter, much less any real way to measure what I do have. Is that a square meter before flip to flower? I'd say it's about 9" high by about 9" wide so if I flipped it today would that be .052258 square meters? (9x9=81 converted to square meters) soo... .052258x100 or .052258x250 on the high end. So 5-13 grams? That seems really low. Am I doing that correctly?

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that would be a sq meter of flowers under a 1000w. So it will depend on what she will be at the end of flower.

Thats why RIU members just say about a pound..lol. It will be what she will be.

Lucky Luke said:

that would be a sq meter of flowers under a 1000w. So it will depend on what she will be at the end of flower.

Thats why RIU members just say about a pound..lol. It will be what she will be.

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LMAO I'm thinking about a pound, maybe pound and a half from the Durban and cherry. Probably half pound from the kush

You didn't mention how often you water (frequency). They look over watered, which would give you symptoms of micro deficiencies. Keeping the soil wet will rot the roots and they won't be able to take up nutrients. It appears to be a deficiency, so you feed more, which doesn't help. You suspect loclout, so you flush, which doesn't help.

You will really see it when you flip to flower. They will yellow and go crisp.

If that's the problem, you might as well feed the worms.

noobgrowr said:

View attachment 3997572 View attachment 3997558 View attachment 3997572 View attachment 3997573 View attachment 3997558 Title says it all. Can you confirm my belief that this is a magnesium deficiency? Had these clones for about a week and a half, they've grown very well and other than this they seem quite healthy. Started a few days ago, I've got 2 Kandy Kush, a Durban Poison, and a Cherry Lime Haze. This one is the CLH and it's definitely the healthiest and I believe that's why it's showing these signs so quickly. Started about 4 days ago with just some yellowing along the edges of one or two leaves, then a little brown spotting, and then a little more complete spotting like this. It's only on 2 or 3 leaves but it's a little bit on the other plants as well.

Info:
Probably 3 weeks old
Clones
20/4 light cycle
300w (5w diode, red, white, and blue) LED and 7 100w CFLs along sides
Black magic soil from home depot
Black magic nutes A+B
Neem oil
Been struggling with ph, it's been right about 7 the whole time, trying to bring it down closer to 6-6.5.

After my research it seems it's either magnesium or calcium or both. Logically I bought some Cal-Mag to remedy and ran a teaspoon in a half gallon and ran some through 2 days ago. Also mixed some in with some ph'd water in spray bottle and have been spraying the leaves of all plants multiple times per day. Roots are peeking out the bottom (all nice and white btw) and I'm going to be moving to 5 gallon tomorrow along with a ph'd, cal-mag'd and molasses flush.

Oh also all stems are mostly purple with some streaks of green.

Thoughts?

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Get your electric off the ground....

greg nr said:

You didn't mention how often you water (frequency). They look over watered, which would give you symptoms of micro deficiencies. Keeping the soil wet will rot the roots and they won't be able to take up nutrients. It appears to be a deficiency, so you feed more, which doesn't help. You suspect loclout, so you flush, which doesn't help.

You will really see it when you flip to flower. They will yellow and go crisp.

If that's the problem, you might as well feed the worms.

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I assume you mean the kush's with the over watering. I'd agree with that, that's why I've been letting them dry out for about 5 days other than the flush when they moved pots. Between the yellow leaves, the curling, and the spots, I assumed they were over watered and suffering a big mag deficiency. So I tried to remedy that by letting them dry out and then when they went to big pots 2 days ago I flushed to just start over and know exactly what's in going forward. I've had them all for about 2-1/2 weeks and the kush has been watered twice with ph plain water and once with nutes and once with cal mag water. So yes, agree with being over watered. I'm letting all four dry out completely from the up-potting. Should be getting full dose nutes, cal mag, and some molasses for first time tonight.

One thing that I've been seeing pretty consistently is the soil is around 7-7.3 so I've been trying to counter act that with water ph around 6 to bring things to 6.5.

I will raise the power strip etc off the ground tonight. Thanks for the tip. I thought about that too but figured it didn't really matter given that there's no water that could get on it.

noobgrowr said:

I assume you mean the kush's with the over watering. I'd agree with that, that's why I've been letting them dry out for about 5 days other than the flush when they moved pots. Between the yellow leaves, the curling, and the spots, I assumed they were over watered and suffering a big mag deficiency. So I tried to remedy that by letting them dry out and then when they went to big pots 2 days ago I flushed to just start over and know exactly what's in going forward. I've had them all for about 2-1/2 weeks and the kush has been watered twice with ph plain water and once with nutes and once with cal mag water. So yes, agree with being over watered. I'm letting all four dry out completely from the up-potting. Should be getting full dose nutes, cal mag, and some molasses for first time tonight.

One thing that I've been seeing pretty consistently is the soil is around 7-7.3 so I've been trying to counter act that with water ph around 6 to bring things to 6.5.

I will raise the power strip etc off the ground tonight. Thanks for the tip. I thought about that too but figured it didn't really matter given that there's no water that could get on it.

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You might want to add some beneficial bacteria/root enhancers and some enzymes while you are at it. You may need to clean up and kick root growth into overdrive, and microbes can help stabilize soil ph.

greg nr said:

You might want to add some beneficial bacteria/root enhancers and some enzymes while you are at it. You may need to clean up and kick root growth into overdrive, and microbes can help stabilize soil ph.

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To be honest, the roots looked kick ass when I transplanted them to the big pots! They were super white, wrapped all along the outside, aggressively poking out the bottom. My reasoning for the molasses was the same principle, feed the microbes and add some bacteria. I think the only other thing I'd be looking to add is something to help with micro deficiencies and maybe a bloom boost when I flip to flower. Try as I might I can't find anything about the black magic soil having any micro nutes. In my opinion there is none to my knowledge. That's based on the following from their website's FAQ:

"For instance, if you're using a two-part base nutrient like Black Magic Base Nutrients A & B and then add another base nutrient, you will alter the balanced nutrient profile that A and B are formulated to give and risk feeding your plant an unintended toxic concoction.

Supplements — Plant-enhancing micronutrients (or supplements) like Black magic Bloom Boost or Black Magic All-Purpose Supplement are compatible with Base Parts A and B. Don't go too crazy though, sometimes less is more."


So I don't believe there's any in the A+B mix that I've been using. So I'm thinking it would make sense to try adding the supplement to the mix and then the bloom boost when I move to flower. I can pick that up on the way home tonight. Thoughts?

Ok so evening update here.

I just fed all three of them (four I guess). Full strength cal-mag, 6.0 ph (to offset the 7.0 soil), about a teaspoon of molasses in a gallon, and a teaspoon of A and a teaspoon of B.

The CLH took a half gallon with zero runoff
The Durban took just under a half gallon before having a dribble come out the bottom
And the Kandy Kush's got almost a quarter gallon. Not going to give them a whole lot til at least next feeding.

And just a little bit of water for lil babe!

There has been no further damage to any leaves on the cherry lime haze or the Durban poison. Not sure if it was the excessive water and calmag spraying I did, the small calmag feeding, letting them dry out, or giving them big new homes. Or what combination of those things, but it seems to have reversed course or at least halted things. The kandy kush has certainly made a comeback, at least the strong one, but clearly doesn't look nearly as good as the other two.

Making progress! Thanks for the help so far guys!

you should pour enough volume thru each pot to achieve 20% run off when ever you water with salt fertilizers

for example
if you pour in 1 gallon youd want close to 1 liter to drain from the bottom of the pot

this will prevent or reduce salt accumulation and lesson the need for frequent flushing

also don't feed that little plant/sprout any fertilizer...

where talking only about the established plants

I know, I'm in a bit of a dilemma there. I don't really have any runoff trays to capture the water, just garbage bags lol so I'm trying to keep it minimal. Should I just let it sit in the sink for 10 min to let it drain whatever it's gonna and then put them back under?

And with the baby, of course. Just regular water for at least another 4 or 5 days