help needed...(pics)

[R4st4]

is this potassium or callium deficiency it really came over night on moste of my plants..leaf tip and the edges around the leafs r yellow/brown..
i repoted a week ago and few days back i set them under 400 w light from 70 w fl.tubes.. had 1 feeding since transplant.. checked the ph and it was abit under 7...what should i do just feed them or foilarfeed?

 

[Blunt Trauma]

My guess is overwatering. The yellowing of the leaves (chlorosis) leads to death (necrosis) of the leaves.

Only water when the plant is actually dry.

 

[sproutco]

Your ph of your fertilizer plus water should be closer to 6. You would want this also in your soil. If your fertilizer contains calcium and potassium, then I doubt either of these would be deficient. Foliar feeding is not good to do because once done you cant get it back. Foliar feeding works best if there is a micronutrient problem rather than major elements. If you apply fert. to the soil, you can always flush with water if you need to. What was in your 1 application of fert. after you transplanted(be specific)? How strong was the fert. water like in ec or total ppm? What sort of nutrients are in your soil like dolomite lime? Your light should be about 1 foot from the tops of the plants. You can use your hand to see if it is too hot.

 

[Guest]

I'm thinking you are experiencing a magnesium deficiency. Get some epsom salts. I use a teaspoon for every 2 litres of water.

 

[R4st4]

i dont know the ec or ppm.. but the feed was weaker than b4 transplant. right b4 transplant i used 1/3 of recomended strength of canna terra vega and after i used 1/4

 

[sproutco]

Start by getting your ph to 5.8 to 6 in your dilute fertilizer plus water. http://www.icmag.com/ic/showthread.php?t=31294&highlight=sulfuric+acid Your soil ph will gradually go towards this. You fert. should contain nitrogen, phosphorus, potassium, sulfur, iron, manganese, zinc, copper, boron, and molybdenum. It should also contain magnesium and calcium if no dolomite lime is in the soil. If you need to add calcium and magnesium to your your regular fert., you could add 1/4 teaspoon gypsum/calcium sulfate + 1/4 teaspoon epsom salts/magnesium sulfate per gallon of water.

 

[R4st4]

is says on the bottle that full dosage would have ec between 1.0-1.7.. so then last feed would be from 0.2-0.8
and contains:

NPK14-6-17

14% N
3 % Ammonium
11% Nitrate
6 % Phosphor acid hydryde
17% Kaliumoxide
also contains magnrsium, sulphur an trace elements:
Bo, Cu, Mn, Mb, Zn, Fe-DTPA, Fe-EDDHA


thx sproutco, yea ill get ph down later today, will also get the lamp lower

 

[sproutco]

Looks like, according to your fert. list, you are adding potassium and magnesium and no calcium in the water. These 3 elements compete with each other. This is called cation competition. Cation means positively charged. Adding alot of magnesium and potassium without the calcium would create a calcium deficiency. You might want to add 1/4 teaspoon gypsum/calcium sulfate per gallon of water to the regular fert. to balance these elements out. You could use calcium nitrate instead of gypsum at the same rate but would also add nitrogen with it and that might not be good in flower. Sounds like your using a low rate of fert. and that should not be a problem.

 

[R4st4]

hey all and thx for the help...
i think they where abit overwatered so i have let them dry out now for 5 days maybe ill have to wait a few days more b4 i water them, but it seems like the spotting on leafs has stoped.. so now i waiting.. i will do a ph-check b4 next feed and will addjust the ph to 6..but whats happening with the leafs burned on tips and sides.. some1 said Mg deficency..i alsothink that i have given them too little food so i thought of goin up from 1/3 to 1/2 strength ferts..

the latest pics

 

[mac777]

I WOULD FOLIAR FEED WITH SOME PENATRATOR AND A SLIGHT ADDING OF CNS GROW. YOU NEED MORE NUTES. PENATRATOR FORCE FEEDS THE NUTES RIGHT INTO THE LEAVES. ITS BADASS! IT DOES THIS WITHOUT STRIPPING THE LEAVES ONLY USE ABOUT 120ML PER GALLON NOT THE 240 THAT RECOMENDED. THEN ADD A LITTLE GROW LIKE BOTANICARE GROW OR SOMETHING LIKE THAT.

 

[MynameStitch]

ok here is whats wrong, your plants have a few problems
i would not foliar feed anything untill i know the problem first..... if heat issues are the problem the last thing you want to do is foilr feed
for one i need to know what soil mixture your using. how often your watering

and when was the last dose of nutrients and how much did you feed them and how often are you feeding? since you added them to the 400 you very well could be burning them

if you are testing your ph properly your ph is fine..... are you testing run off? and what are you using to test it with? what water are you using? RO? tap? distilled? bottled?

you could very well have ph issues, that brownish looks like your soil may be acidic you have either the soil mixture is to strong, heat issues....... ph
it looks as if you have burned them........ but looks cant always tell the problem
which is why i need more info on this one

when did this problem start before or after transplanting?

 

[mac777]

"leaf tip and the edges around the leafs r yellow/brown..
i repoted a week ago and few days back i set them under 400 w light from 70 w fl.tubes.. had 1 feeding since transplant.. checked the ph and it was abit under 7...what should i do just feed them or foilarfeed?"

OMG MYNAMEISSTICH you must be crazy hes only had one feeding since he transplanted! If you know about penatrator you would of never made
those comments. its the only thing of its kind! obviously if hes ruining a 4 inch or bigger on his 400 then heats not an issue and you must assume that hes running one. these plants look nute deprived! thanx ps if your gonna foilarfeed do it like a hour before the light goes on as the water can act as a sort of a magnafing glass on the leaves!

 

[MynameStitch]

if he put them into a soil mixture that is very strong it could be but like it said i didnt say it was nute burn!!!

so stop accusing me here

i stated this!

you could very well have ph issues, that brownish looks like your soil may be acidic you have either the soil mixture is to strong, heat issues....... ph
it looks as if you have burned them........ but looks cant always tell the problem

i said it looks as if!! IF being the word here

im not crazy, your crazy for not reading my post properly
i also asked him for more information because like i said in the previous post
looks cant always tell the problem
i been doing this for years i think i know about sick plants mac......

and my name is NOT mynameISstitch
its mynamestitch

prooves you dont read to well

also if you look in the pictures..... why is only mostly the top most upper leaves affected?

if it was ph issues it would have affected most of the plant by now with the damage its showing

those plants are not very big either which dont require alot of nutrients
as long as the soil is rich you wont need to feed weekly
you would only need to feed weekly when your soil nutrients are getting used up......

also if you know thi from what he stated

a few days ago he set them under 400 watt hps from 70 watts cfl's

hmm now if you think about it mac... thats a BIG jump for thes plants... alot of plants have to be weaned into higher wattage of lights, thats a big jump in wattage

plants can and have had heat issues from this even if temps are right...
its called raident heat, this has happend to me before when i jumped my plants from 400 to 1000 watts and it was about 8 feet above it and they was plants a little bigger than that

there are alot of clues here that point to as to why its not a nutrient problem

nutrient problems, none i have ever seen start like that
let alone at the top of the plant and the rest of the plant is fine.. there is no yellowing just browning of the edges of the leaves... never seen that before, only in potassium deficeincy once the potassium deficiency is gone and it leaves behind browned edges, but with this problem, potassium doesnt start from the top part of the plant it starts around the middle of the plant
the only problem i see besides the browning is he is starting to get a magniseum deficiency, but the browning is NOT from the magniseum problem its from something else

ph would cause spotting and necrotic patches through out the plant
thats not it either
so what else would be left?

think about it


also take a look at the 2nd picture... there is a leaf that is starting to turn white.. fom being bleeched....
the brown stuf around the edges is dead leaves that died, plants that have dead necortic tissue was caused by enviromental. those leaves was not sucked dry from the plant, if there was a nutrient problem the leaves would have looked differently and not the way they do, these leaves was not sucked in any way they was damaged by other means those leaves are crispy and when crispy leaves happen, that would only mean heat, raidant heat or nutrient burn or temps to dry and RH
im not crazy mac, i have been doing this for quite some time and im very tuned into clues and how nutrients work within cannabis, and when they dont work when certin things goes wrong, not trying to flame you, but i dont like being called crazy :/



what are you using for reflection R4st4?


/me off to go play some sim city 4 rush hour

 

[R4st4]

hey, the problems started after they where set under the 400 w ..soil is mainly pheat mixed with perlite if its heat prob it have to be RH cause the lamp is 2 ft from tops.. and good ventilation.. b4 transplant they where in 12 liters pots.... the new pots r 60 l but i got 2 plants in each and when i transplanted i had the root balls in bucket of water and then set them in the new pots and watered them... and after transplant ive given them lots of water think they got too much and didnt let the soil dry out b4 i did it again. hmm the burns on the leafs came day after i watered them last...the ph was 7 of the runoff..i just have ph paper..


this is the reflector im using

 

[R4st4]

b4 transplant i gave them abit over a liter every 2-3th day first time after i gave 2 l to each plant the next time i gave them aboute 1 liter of 1/3 strength ferts that was 2 days after first watering then 3 days after i gave them 3 l each with water(tap water wich has ph 7)

 

[rastamonunika]

hey r4sta: how do you like the growbox>? Is it everything you had imagined<>? Anything you dont like>?

just wanting to get some "real world" feedback about those things. .

<3 be safe

lots of love

unika

 

[MynameStitch]

ph is fine, i ts not your ph, raise that light up and see what will happen.... trust me


also to avoid problems now that your soil is mixed in this mixture, please make sure you had a few table spoons to each pot of dolomite lime if your mixture does not already have it added

peat is very acidic, but rigtht now ph is NOT causing your problem, but you wil have issues if you do not have lime in your soil......

garden shops and hardware stores carry it
very cheap and one thing all soil growers should have in there soil when growing

also i wouldnt be using that much nutrients at once

1/2 teaspoon per GALLON of water is all you are supossed to be using if that

you could get away with right now using 1/3 teaspoon per gallon since you got fresh soil

weekly! you could be using to much right now dpending on what nutrients your using, what nutrients are you using right now?

 

[R4st4]

im using Canna Terra vega

and contains:

NPK14-6-17

14% N
3 % Ammonium
11% Nitrate
6 % Phosphor acid hydryde
17% Kaliumoxide
also contains magnesium, sulphur an trace elements:
Bo, Cu, Mn, Mb, Zn, Fe-DTPA, Fe-EDDHA

 

[sproutco]

add 1/4 teaspoon powdered gypsum per gallon of water along with the regular fert. You would not want dolomite lime because it contains magnesium and that is in the regular fert. already. You would use calcitic lime to raise ph if needed in the soil and then not use gypsum with the water.

 

[MynameStitch]

that all depends how much magniseum is added, most nutrients only have very small amounts of magniseum which is why alot of people suppliment with lime, not to mention his fert doesnt have magniseum in this case

and cannabis likes alot of magniseum i never seen any problem with anyone using magniseum from dolomite lime and using a fert that has magniseum in it, because of this most ferts out right now dont have enough for cannabis unless you use advanced nutrients

in this case hes not so he wouldnt have a problem with that sprout