I have a deficiency.

[Brownpants]

I think I am needing some Magnesium....

Or is it something else?

 

[Verite]

Good pics but a little sparse on the other info. Some detail on what you have done over the last week or so would help. Measurements, environment, etc.

 

[PFCruz]

hey there brownpants, How tall are the plants/how big are the pots? ANY small change in my plants growth or apperance and it gets some mineral matrixfrom bio-genisis. good luck

 

[Brownpants]

Here is some more info:

This is happening on a few plants of different strains all in Veg and less than a month old. They are using the same organic soil mix, that is where I think there is something lacking. My mix is composed of peat moss, worm castings, perlite and I add about a cup of bone meal, blood meal, kelp meal, dolomite lime and about half to quarter cup of epsom salts.

I think I am not adding enough epsom salts or I didn't mix it good enough with the soil.

I have added some epsom salts and calcium hydroxide to my last watering, but haven't seen an improvement yet.

I just want to know that I am not missing something?

I will check PH later today to see if it is out and about.

Thanks for the help with this.

 

[Guest]

hello brownpants

hello brownpants

hey report back with the pH
from the runoff, and before it goes in

i am curious as to what it reads to myself, i have 1 seedling showing identical symptoms, i believe it's a pH issue (possibly lockout) but i ran out of tests so im winging it LOL i was going to foliar feed some epsom salts (2 tbspns pulverized and dissolved in a gallon of warm water) as my water is super-soft anyway before ferting again, Let us know the verdict, brownpants

cj

 

[Verite]

Imo a plant that young doesnt use that much magnesium. The avg mj plant needs boosted mg between 1-2 weeks before flower and for about half of the flowering time. Before and after those times tends to be too much if supplimented. Then you should know the base ingredients of what you are adding to your mix before you over do some of them. Specifically dolomite lime which is comprised of magnesium and calcium. If you added dolomite lime at a cup per container in addition to a halfcup of epsom salt then you have way too much magnesium and calcium to begin with. Im going on ten+ years of no dolomite lime use and the times I used it before I realize were not necessary.

 

[Guest]

hello verite

hello verite

if you were talking to me my plant is mature, just grown from seed
i also grow in unsupplemented promix/perlite .. it has no added nutrients either..
i foliar feed epsom salts, not saying brownpants should, i just am

let us know that pH , brownpants

cj

 

[Verite]

Sorry CJ the reply was meant for BP.

 

[Brownpants]

I have some PH numbers.

This was taken from the runoff. I added RO/DI water for this PH 7.0.

Plant 1 had a PH of 6.3
Plant 2 had a PH of 6.6
Plant 3 had a PH of 7.2......This was the smallest pot and I added some CaOH and epsom salts yesterday, that is why the PH is above 7.0. (I think)

The lime I use is called "Garden Lime" it is 98% Calcium Carbonate...Which I believe is dolomit lime. I don't think there is too much magnesium in it. 2 or 3%

Verite - I probably am adding too much magnesium, but is it harmful to the plant in higher quantities? I like to get an all-in-one mix made for the whole grow. Saves me from micro-managing the supplements all the time. I add Dolomite lime to act as a buffer mainly, and to my knowledge Calcium carbonate (PH 7) is pretty inert, it isn't very soluble in water and is a good source of Ca.

Captain Jack - I don't like to foliar feed very much.....Just a personal choice. I try and keep things as simple as I can.

 

[Guest]

no clue brown pants i will be watchng this thread to see if anyone has any answers

just double-checked-out yer pics and my sick plant looks a bit like your #2 pic but my leaves start to yellow from the bottom up, i see green foliage below the yellow leaves on your plant that have cholorosis.. dunno mang, i may have something different, i think i have N locked out.. also i KNOW for FACT a couple of my plants are lacking mag, and calcium..


if all else fails you may try pm'ing stitch, check the sticky thread by him on the "complete guide to sick plants,pH,and pest troubles" in the infirmary.

good luck again

verite sorry for assuming LOL i have a habit of doing that :-D

cj

good luck bud

cj

 

[KingRalph]

brownpants, you have too much mag happenin there, and too much calcium is also apparent. you've got plenty of lime and epsom salts in the soil to keep the plants more than happy for quite a while, don't supplement any more epsom salts and calcium hydroxide or you will see the problem increase perhaps beyond repair. also, when watering try to keep the water's ph closer to 6, which will only take literally a couple drops of ph down to move RO water down. hope they even out for ya...

 

[Brownpants]

Thanks Guys, It seems I am killing my plants with love again....

I think I will Flush them and transplant them into bigger pots with a new soil mix.

Thanks again for the help, much appreciated!

 

[Purpleseed]

How an excess of Mg can cause a Mg lock up?

 

[gOurd^jr.]

I had the exact same symptoms as your pics show complete with leaf curl and all. I watered with a tablespoon or so of Epsoms in a gallon of water and it did the trick so I was just plain old deficient. Your PH sounds fine so I think that you might be in the same boat. Keep in mind that once the damage to older leaves is done they won't recover. What is happening is that your plant doesn't have enough Mg to suppourt new growth so it pulls the Mg out of older leaves to use in the active growth tips. Once that Mg is pulled from those old leaves it won't get sent back. So be patient If you give them some Epsom salt don't expect them to green back up overnight. In fact the best case scenario is that you give them some Mg, yellowing halts and new growth accelerates. This is exactly what I got, but it takes a couple of days. If you give them Mg (Epsom Salts) and the yellowing continues to worsen after the second day or so then you could be locked out by Ca or Ph. I think a transplant will only do good things, don't overdo it on the Lime(Ca) because that might be your problem.
Generally, from a soil chemistry perspective too much Ca tends to limit the availability of Mg for your plants and vice versa. If there is an overabundance of one positive ion on the soils exchange sites then it makes it very hard for your plant to get enough of the other. This can be a problem especially with Ca locking out Mg. This happens because Calcium tends to have a greater affinity for occupying those sites than Mg. I.E. it forms a stronger bond to the soil sites.
Purpleseed, an excess of Mg won't cause Mg lockout,it will cause Ca to be locked out. However too much Mg can reach toxic levels and you would have Magnesium toxicity, I expect the symptoms would differ from a deficiency but I'll check up on that.

Let us know how it goes Brownpants
keepitgreen

 

[Verite]

Too much mag can cause a bevy of problems. Heres a great chart to show nutrient interactions, some are intuitive some are not.

Heres the source. Most of its farming related but very informative for the soil grower in general.
http://www.farmtested.com/56.html