Is this a Magnesium Deficiency?

[Humboldt14]

I am having the same problem........ my humdity is already at 45 percent. mine cupped after i fed yesterday.

 

[brasmith]

Big Bloom™ Liquid Plant Food (0.01-0.3-0.7)

You are using^^^ npk ratio for your vegging plants? This is probably the issue, it just hasn't shown up in your other plants yet. Switch over to a veg formula and things should get better.

 

[KlosetKing]

Big Bloom™ Liquid Plant Food (0.01-0.3-0.7)

You are using^^^ npk ratio for your vegging plants? This is probably the issue, it just hasn't shown up in your other plants yet. Switch over to a veg formula and things should get better.

really? this is the first ive heard of that. in fact, every FF feeding chart i have ever read says that Big Bloom is what you want during the ENTIRE process, both veg and flower, its Tiger Bloom and Grow Big that shouldn't be used until flower? and as previously stated, ive only fed twice on a very diluted level.

secondly, with values of .01-.3-.7, how is that what may be nuking my plant? just about every other fertilizer i see is like 10-10-10 or 20-20-30, or etc, Big Bloom is the lowest in those numbers ive seen.

iam also not a pro so that doesn't exactly mean anything.

 

[brasmith]

really? this is the first ive heard of that. in fact, every FF feeding chart i have ever read says that Big Bloom is what you want during the ENTIRE process, both veg and flower, its Tiger Bloom and Grow Big that shouldn't be used until flower? and as previously stated, ive only fed twice on a very diluted level.

secondly, with values of .01-.3-.7, how is that what may be nuking my plant? just about every other fertilizer i see is like 10-10-10 or 20-20-30, or etc, Big Bloom is the lowest in those numbers ive seen.

The npk ratio for vegging plants has a higher nitro content which is needed for growth in higher amounts. Your npk shows that nitrogen has the lowest amount and the pk is higher. Flowering plants require more pk than they do nitro. It doesn't have anything to with the high values ie 20-20-30. It has to do with the balance of the npk. Of course an N of 20 would require that the pk values are up there too, but with an N of say 5 the pk will be something like 3-4. Concentrations must make sense at the growth phases they are in.

 

[bLITzkRIEg420]

40% - 60% humidity is the perfect range... Good work KK you were on the ball with that shit! Some strains grow in different conditions than others. Some will like it dryer than others so do your homework. A strain like Critical Mass or Chocolope will have issues with mold if exposed to soggy conditions. We need to get your pH dialed in. I strongly advise you to forget the nutes until you have a way to consistently control your pH. Have you been able to test your soil or the water you water with? I really think you should look into the SUBCOOL's SUPER SOIL mix. Organic soil like that has everything your plants would ever need to thrive and you would only have to add water. One of the best plants and the plant that I am most proud of in 16 years of growing was a Green House Seeds Great White Shark grown in the TGA organic mix. Do me a favor and look into it just for kicks... It really could be as easy as "Just add water" and forget throwing away your $ on nutes. Humboldt14 Cupping of the leaves is a sure sign of ~underwatering~heat stress~low RH~

 

[KlosetKing]

brasmith: thanks for the clarification on the npk balance, but that also confuses me and leads me to my next question. i thought p and k were important during veg, and that N was more important in flowering than in veg? it seems that most of what i read says something to that effect.

blitzkrieg420: ya i do what i can lol. the humidifier is barely keepin' up with the lights though. during lights on it will stabilize around 37% now, when they go off, it will hold it at around 50. either way leagues better than it was. and yessir i will be looking into that soil mix asap. as ive stated before these plants were from bagseed, and mainly started for the reason that i knew i would see problems like i am now, and i didn't want to waste my good genetics (got some fem Black Jack's waiting to go) by making these mistakes that i KNEW i would make on my first attempt =D

as for the soil and water, iam still doing color coded tests of water, and still cant do anything but runoff for soil. i AM on the hunt for a good pH test kit if anyone has a good quality/price balance that will get the job done for me.

thanks again everyone for the helpful responses!

 

[moz324]

I was looking at your pics and I happened to notice that you may have a case of molybdenum or mo deficiency. Leaves will have a pale , fringed or scorched look along with strange looking leaf growth. Older leaves have rolled margins, stunted growth and red tips that move inward. It generally occurs when S and P are deficient. Treat with water soluble fertilizer by foliar spray

 

[KlosetKing]

I was looking at your pics and I happened to notice that you may have a case of molybdenum or mo deficiency. Leaves will have a pale , fringed or scorched look along with strange looking leaf growth. Older leaves have rolled margins, stunted growth and red tips that move inward. It generally occurs when S and P are deficient. Treat with water soluble fertilizer by foliar spray

this hasnt come up before... looking into it as we speak. i seem to be having a hard time finding any pictures of it on the web, got any links? and iam assuming my big bloom does not contain this mineral, but it seems tiger bloom or ka-ching do

thanks for the reply

 

[KlosetKing]

thought i would throw up a few fresh pics of the issue. the first 2 are to demonstrate the inside out rot which is weirding me out. the leaves on top rotted outside in (sorta) where as those bottom fan leaves are rotting from the inside center (where the stalks stem meets the leaf) out. second 2 pics are of some of the new growth. on the first one (3rd pic) you can see the bigger top leaves have the edges starting to go (not the heavily damaged ones, those are the older leaves) but just as those did, the brand new leaves that are just barely emerged from the top are just starting to show signs, a good 3 days after they initially showed up. i was worrying about how light green my new growth always is, but i recently read that it could be that this sativa strain in particular is sensitive to temp changes, (during veg it was dropping a good 15-20F during its night cycle) which would also explain the slight purpling of a few streaks near some nodes on this plant as well.

-edit- forgot to point out on the 2nd pic, you can also see some slight discoloration starting on the inside of the bottom left leaf, which is the first time any leaf damage has begin in such a way (all other damage aside from that weird center rot starting like nute burn, outside-in). almost definitely calling that one a calcium issue, and iam headed out to get some Cal-Mag as we speak =D

 

[Sketchbomb]

To throw in my 2 cents, I kinda agree about the Mo deficiency. More Nitrogen couldn't hurt in veg considering your nutes weren't giving more than 1%. Nitrogen is crucial in the vegging period and phosphorus and potash are more important in flowering. Best guess would tell me that you should flush the holy hell out of them and consider some organic ferts (guano, bone meal, blood, etc) to get your nutrient levels in balance. The NPK value is in percentages listed as decimals. Just because the figures are lower doesn't necessarily mean that it's good for the plants through life. You have to adjust the levels as the plants mature from high nitrogen to high phosphorus/potash in the veg and flower stages respectively. I try to use something like 15-10-10 in veg and 10-20-20 in flower. As for the soil testers, they're generally pretty unreliable but as long as you don't try to use water testers for your soil then we won't have to call you names ; ) There are plenty of options if you just look around a little online. Almost all home/garden stores carry them and you can even save a little cash by getting one that reads soil ph and like humidity or whatever.

 

[KlosetKing]

well looking around today and i could no where near afford a digital one (they were like 200 bucks) shits inflated in my area. but i got a standard soil testing kit, though i dont know if it is exactly what i was looking for, it was the closest thing i could get at this point. i also grabbed a bottle of FF Grow Big (6-4-4) will that work better now that iam dropping into flower (went to 12/12 3 days ago, waiting on sex before i transplant).

speaking of transplant i also picked up a fresh bag of FFOF, since i was using a home mix of perlite/MGO/Peatmoss until now. most of the soil on these is still wet from the flush i gave them a few days ago, should i wait til it dries before i put it into new pots? or should i just do it now?

oh, and i grabbed a bottle of CalMag Plus, which i will start adding next time i water/feed. maybe i should just transplant them all tonight and do a flush, finishing the last gallon of it with some calmag water? open to suggestions!

thanks again all!

 

[KlosetKing]

To throw in my 2 cents, I kinda agree about the Mo deficiency. More Nitrogen couldn't hurt in veg considering your nutes weren't giving more than 1%. Nitrogen is crucial in the vegging period and phosphorus and potash are more important in flowering. Best guess would tell me that you should flush the holy hell out of them and consider some organic ferts (guano, bone meal, blood, etc) to get your nutrient levels in balance. The NPK value is in percentages listed as decimals. Just because the figures are lower doesn't necessarily mean that it's good for the plants through life. You have to adjust the levels as the plants mature from high nitrogen to high phosphorus/potash in the veg and flower stages respectively. I try to use something like 15-10-10 in veg and 10-20-20 in flower. As for the soil testers, they're generally pretty unreliable but as long as you don't try to use water testers for your soil then we won't have to call you names ; ) There are plenty of options if you just look around a little online. Almost all home/garden stores carry them and you can even save a little cash by getting one that reads soil ph and like humidity or whatever.

i looked into some MO deficiencies, and it looked like it may have been that, but mine didnt exactly have the same red/purple color to it like most describe, though it did resemble it. i also didnt see any MO listed as a micronute in either my Big Bloom or my Grow Big, are they in there and not listed? or am i going to need to go find another supplement for that as well.

better yet is it in the FFOF. since iam transplanting into it now, at the beginning of flower, i doubt ill even need to use many nutes by harvest, since FFOF is pretty hot out the bag, so if its in there it would be nice that i didnt need to go spend more outrageous amounts of money on more nutes lol