Re: Quest for 1g/w: 1k hps liquid cooled on a 6' mover in a 4x8 tent.
@ Kamikaze, sounds good bro. Later if you want to upload and post some pics, pm me and i'll help you figure out how, and how to start a thread so you can update us whenever you want to.
Could be potassium but there's more veins present in this problem and the necrosis is more yellow brown or green brown. Yours seems to be more brown-brown
Could be a phosphorous deficiency. Smaller sweet spot - so more sensitive to being out of range?
Here's the nutrient absorption range chart I like the most
thanks soniq. your opinion is much appreciated. (i do love that chart too)
i'm not sure either fit very well according to this guide. . . i read the other guide when i was trying to figure it out. maybe if i give more details, because neither of them fit perfectly.
PHOSPHORUS:
When your plants are deficient in phosphorus, this can overall reduce the size of your plants. Not enough causes slow growth and causes the plant to become weak, to little amount of Phosphorus causes slow growths in leaves that may or may not drop off. The edges all around the leaves or half of the leaves can be brownish and work its way inwards a bit causing the part of the leaves to curl up in the air a bit. Fan leaves will show dark greenish/purplish and yellowish tones along with a dullish blue colour to them. Sometimes the stems can be red, along with red petioles that can happen when having a Phosphorus deficiency. This isn’t a sure sure sign of you having one though, but can be a sign. Some strains just show the red petioles and stems from its genes.
So pretty much the overall dark green colour with a purple, red, or blue tint to the fan leaves is a good sign of a Phosphorus deficiency. Having Cold weather (below 50F/10C) can make phosphorous absorption very troublesome for plants.
Many people get a Phosphorus deficiency confused with a fungus problem because the ends of the leaves look like a fungus problem, But the damage occurs at the end of the leaves. side of the leaves and has a glass like feeling to it as if it had a ph problem. Parts affected by a phosphorus deficiency are: Older Leaves, Whole plant, Petioles.
the size of my plants seem fine to me, biggest i've ever grown. slow growth is not a problem, but the stems do seem slightly weak, like they have a low turgidity. The edges of the leaves are turning a light brown (tan) and you are right, not yellow yellow, and it does work its way inwards causing the leaves to curl, but they dont curl up, they curl down and roll in on themselves. I am not showing any blue, purple, or dark hues in the fans or the flowers, infact almost the exact opposite, overall the fans are slightly pale green with some weak interveinal chlorosis.
So although some pieces fit, i dont feel like this matches my symptoms very closely.
POTASSIUM
Having to little of Potassium in your plants causes the plants leaves to show retarded growth and show a scorched tip and edges around the leaves. Plants may stretch and your branches can be easily broken or weak. Don’t get this deficiency confused with iron, because it almost acts like iron but to tell the difference in the two is: for potassium the tips of the leaves curl and the edges burn and die. Older leaves may show a red colour and leaves could curl upwards. Dead patches (Necrosis) can happen on the margins of larger fan leaves thus, the leaves will eventually die off and turn brown. The Older leaves will show different patches of colour (mottle) and turn yellow between the veins, following by whole leaves that turn dark yellow and die. The plants overall growth slows down, mostly when they are in vegetative stage. To little amount of potassium also slows the growth of buds during flowering stages. Dark edges will appear around the edges of the leaf when the deficiency is starting to happen. When your Relative humidity is low, you can almost bet your going to soon get a potassium deficiency from your plants perspiration.
Potassium can get poorly absorbed when having too much Calcium or ammonium nitrogen, and maybe cold weather. Having to much sodium (Na) causes potassium to be displaced. SO keep those in mind… Parts affected by a Potassium Deficiency are: older leaves and leaf margins.
i don't know how leaves show retarded growth, but i don't feel they are, but they definitely have scorched tips and edges. also the branches do seem slightly weak. the edges of the leaves curl and die. the older leaves do show a reddish brown mottle, but there is also thrip damage. your right that it's not very vein-y for the part that have the most damage, but the ones showing less are more interveinal, looking kinda like a mg deficiency leading up to the burn you see on that leaf.
sorry to post so much here, but i want to look at everything. Here is from Mr. HIGHway:
Phosphorous
Phosphorous is used for plant energy by being assimilated into molecules called Adenosine-tri-phosphate, or ATP. This molecule is necessary for any plant activity that requires energy such as root growth, flowering, respiration, and vegetative growth.
Phosporous deficiencies are distinct. Purple stems, leaf stems, leaf veins and stunted growth are a sure sign of a Phosphorous deficiency. Leaves will also tend to be smaller and dark green, and may or may not include necrotic patches. Bud size will be smaller and underdeveloped, as will the root mass.
Potassium
Potassium serves to aid in the process of photosynthesis, nutrient uptake, respiration, and is a key to sturdy stems and disease resistance. Having an adequate supply for the plant early in it?s life stage will keep your seedlings from falling over.
Potassium deficiencies are identified by necrosis on the margins of larger fan leaves. Necrotic patches can be seen on the leaves as well. Leaves will eventually turn yellow, brown and die off. Most of the plants that show signs of a Potassium deficiency are going to be the tallest and best looking plants you have.
from this, it ssems more like potassium to me. especially the bold part.
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ANYWAYS
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whatever the problem is, the solution seems to be the same when playing it safe:
1)Flush (with something to battle any bad bacteria i might have)
2)Feed a nice fresh balanced nute reg.
hopefully that will be enough to carry me through the second half of flower (which officially starts today)
I added 30ml/gal of 3% H2O2 to this latest flush, as per
how to use h2o2 guide which was actually not written for a flush, but just to add it to your res.
I will add about 20 ml/gal to this res as a follow up treatment.
You're doing the STG proud Wheel.
Not bad on the buds either,
Bout half-way, nice bro!!!
McLuvin it!
Sf.
thanks bro. . . they are getting bigger everyday.
exactly half-way to day my friend. here's where the buds
should start to kick ass.