magnesium, Iron or zinc deficiency
- Thread starter AkZuz
- Start date
Brawndo G
Active Member
Zinc for sure. The thin, pale green new growth along with the leaf petioles starting to turn magenta indicating a p deficiency is a dead giveaway(zinc is a limiting factor in p uptake if there isn't enough). Probably manganese, copper, and boron as well unless you are already feeding those to the plant. The interveinal chlorosis makes me think manganese....that, and the fact that it's absent from at least 90% of ferts and soils. The best supplement for the metals(mn, zn, cu, b, mo, co) is Big 6 by buildasoil. It's the only one I know of with a balanced ratio, and it doesn't have iron which is usually already plentiful in most soils.
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AkZuz
New Member
Can recharge help?
Kerowacked
Well-Known Member
No drainage? Just looks overwatered if its sitting on that wet towel. Maybe pm starting on some bottom left leaves.
AkZuz
New Member
No water sitting on it and it’s a fabric pot
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Brawndo G
Active Member
No. If my memory is correct, recharge is kelp, humic acid, and microbes. You need a micronutrient product. Kelp is only good for potassium, growth hormones, and trace minerals.
If you end up buying some Big 6 or tm-7(same as big 6 plus iron) use it as a soil drench 2x a week in a solution of 6.5 pH or lower for maximum availability, and foliar 1x a week.
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Kassiopeija
Well-Known Member
could you perhaps elaborate?
Kassiopeija
Well-Known Member
Kassiopeija
Well-Known Member
humics act as chelating agent to help mobilize micronutes
microbes metabolize organic compounds to free these ions
Countryboy Grower
Active Member
Could be zinc but more likely magnesium deficiency. Are you using RO water? If your feeding cal/mag. make sure your ph is around 6.5-6.8 in soil. 5.8-6 in Coco. Also if you meter your water make sure the meter is calibrated.
Brawndo G
Active Member
Zinc, manganese, copper, and boron are never present in appreciable amounts in any of those ingredients you listed, so there is no way to "mobilize" them with humic acid or microbes. The elements have to be present in the soil first. That plant is most definitely deficient in micronutrients(zn, mn, cu, b, co, mo).
If you don't believe me, get a soil test on some ffof and prove me wrong.
If you don't believe me, get a soil test on some ffof and prove me wrong.
Kassiopeija
Well-Known Member
I'm not denying the plant isn't deficient but it most likely from user-error and not the lack of micro's in the pot, esp. since the OP wrote he did feed it with it with veg-nutes, and any type of general plant 1-bottle food will have a typical micro-nute formulae contained.
Also, why would I invest funds to falsify such a claim that the above ingredients don't contain micro's? It's rather you that should support your claim with facts.
Many of these minerals or metals will be contained in EWC, kelp & fish emu but only be needed in ppb.
Kassiopeija
Well-Known Member
Shrimp meal:
It's not possible to avoid micros in organics at all since these atoms are bound inside the cells into the molecular structure
Ocean Forest Potting Soil - Goffle Brook Farms
In last week’s “develop a plan for your vegetable garden” blog post we recommended as a potting soil/growing medium our Coast of Maine Ocean Forest Potting Soil. Herein is a summary of that recommended garden product as well as a full review by Gardens of Cascadia.
gofflebrookfarms.com
The other organic dry or liquid ferts ammends contain micros as well.
It's not possible to avoid micros in organics at all since these atoms are bound inside the cells into the molecular structure
Brawndo G
Active Member
If you re-read what I wrote, I said they are not contained in appreciable amounts in those ingredients which means there is not nearly enough to provide for the plants needs. You don't have to believe me. That's why I suggested you find out for yourself. Pardon the way I worded it originally. I didn't meant to challenge you like that.
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Brawndo G
Active Member
Here's the breakdown:
| FFOF1 | FFOF2 | Ideal | |
| Mn(ppm) | 10 | 11 | 50-100 |
| Zn(ppm) | 1.97 | 3.19 | 25 |
| Fe(ppm) | 196 | 270 | 50-100 |
| Al(ppm) | 94 | 82 | 0 |
| Ca(%) | 48 | 62 | 85 |
This video was from a year ago, the soil tests are even older, and it seems FFOF used to have granite dust in it which would account for the high Fe and Al. Crab meal is still high in Fe though. Either way, every soil he tested was deficient in Manganese, Zinc, Boron, and Copper. Starting at 59:30 in the video they discuss the necessity of adding those metals in sulfate form to all soils...except boron which comes in the form of sodium tetraborate(borax). They also talk about some organic amendments(kelp, rock dust, soft rock phosphate) that are notoriously high in heavy metals. Kelp is high in sodium as well which is ideally not present in the soil aside from the small amount in borax.
For the record, I agree with Matt LePlante more than Bryant Mason, but I follow Slownickel's recommendations strictly as they have all proven to be true in my trials. He has an excellent thread at this link here: https://www.icmag.com/forum/marijuana-growing/cannabis-botany-and-advanced-growing-science/330463-slownickel-lounge-pull-up-a-chair-cec-interpretation. It's about 300 pages, but you can skip posts by anyone but him and it makes it a more manageable read. He's an agronomist and farmer with 40+ years experience in the field and is still farming and researching to this day. He posts on IG as well. He is very adamant about the importance of having high calcium in the soil and plant tissue. High calcium is the only way to maximize yield and quality.
A great book about calcium is "More Food From Soil Science," by Dr. Victor Tiedjens. A free copy is available for download at soilandheal.org.
Kassiopeija
Well-Known Member
Man this US is killing me. 300 pages of a thread plus hours of YT when they could just state the proper minerals on the bag, like here in EU it's mandatory.
I mean they put a hell of a lot of amendments in their soil but still it doesn't have a sufficient formulae.
But thing is, just use more (pot up to three-times the current potsize) and bingo - all nutritions available by X2 of former netto weight. U see all soil will be depleted of most nutes at some point in the growth, and that's where the
I mean they put a hell of a lot of amendments in their soil but still it doesn't have a sufficient formulae.
But thing is, just use more (pot up to three-times the current potsize) and bingo - all nutritions available by X2 of former netto weight. U see all soil will be depleted of most nutes at some point in the growth, and that's where the
should be able to substitute that, isn't it?
btw I found proof of what you said about specific availabilites in soil due to Ca in a textbook on this, but it refered to outdoor soil. But I agree with your assessment nontheless, Ca is one of the major nutes and should be high esp. in a reasonable manner with N.
PadawanWarrior
Well-Known Member
I've gotta be careful adding amendments high in Ca. Ca locks out P and K. I use my well water and it's only like 140ppm, but it's probably mostly Ca.