hydro deficency help

[skotty]

i have an autoflower which is 3 1/2 weeks in veg in dwc, she has been on .6 ec and ph 5.6-5.9 all of her life and didnt show any signs of wanting more feed,

just recently she has developed what looks like nute burn on the tips of her leaves but im unsure as why, .6ec is really low dosage her overall health looks good she looks maybe a little pail in colour but nothing major, her ec does rise from .6 - .7ec and the ph does drop a couple of points,

her res temps are 69-70 degrees constant and her roots are crystal clear, its not root rot before anybody goes down that road

she is currently on just ph 5.8 water with added rhizotonic and im unsure which direction to take next ??

here are some pics of her

 

[U.G.U]

looks good but a little light raise it up to .7-.8

 

[rainforestnomad]

I agree. Overall your plant looks nice, however you are likely underfeeding at .6 ec in DWC. If you suspect a nutrient deficiency, the last thing you want to do is put it on straight water without any nutes. Your best bet is to get back on the nutrients right away, and go up a bit, like .2 EC as U.G.U. suggests.

if you look at your leaves, theres a little bit of interveinal chlorosis going on, the veins of the leaves are nice and green, however the leaf tissue between the veins is getting a little yellow. this is often indicative of magnesium deficiency, which is super common for MJ. you can boost your plants access to magnesium by upping your PH a bit. maybe to 6.0 for veg, lower it when you are two weeks into flower.

last, that browning you see at your leaves edges isnt tip burn. im not 100% sure what it is, but nute burn looks different than that. That resembles maybe another nute deficiency.

good luck

 

[skotty]

cheers for the input ive upped her nutes to .7 as i dont wanna make big jumps and ill see what happens

i was always under the impression that in hydro if the ec goes up then they want less feed and if the ec goes down then increase the feed ??

 

[rainforestnomad]

well there is a relationship to watch for with fluctuating ec and ph, but dont forget that your plant is transpiring water and thus the ratio of water to salt, which is what determines the ec, changes. so just because ec goes up, dont back off on the nutrient content.

 

[skotty]

thanks

as posted above ive upped her feed to .7 ec and ill post pics in a couple of days and see which direction she is heading in, and take further action if needed

peace

 

[HempAlchemist]

looks like the begining of Mg and N deficiency. sounds like you added more food so you should be fine. just keep and eye on the new growth, the older growth may not get better. you do want a nice jade color green in your plants, so once the color comes back keep the EC at that lv and watch for signs of over feeding.
good luck
HA

 

[skotty]

appreciate the input guys can any of you recommened a ph to overcome this should i be aiming for the 5.5-5.8 range or should i be 5.8-6.1 the only reason i ask is my ph stays really stable and letting it drift is not an option at the minute, ive currently got her sitting @ 5.9 ph

also is there a ph that the plants will absorb all the nutrients like a sweet spot ive always thought it to be 5.8 but after seeing these signs in the plant im wondering if i should alter it with every res change, for example 5.5 - 5.8 1 week then 5.8 - 6.1 the following week ??

 

[DIGITALHIPPY]

cheap nutes burn plants real easy.
what are you using?
looks like a burn, could be P and/orK def..

 

[jm420]

cheers for the input ive upped her nutes to .7 as i dont wanna make big jumps and ill see what happens

i was always under the impression that in hydro if the ec goes up then they want less feed and if the ec goes down then increase the feed ??[/QUOTE
This is true but you have to judge it against ph
Ec down ph up to rich
ec up ph down =to lean

 

[skotty]

as far as nutes go im using canna aqua and i also have vitalink max, ill post some pics later and show you guys where she is at, im beginning to think it was the start of n def and because she was being under fed she was pulling it from her own supply hence the older leaves turning yellow , also as stated above it could of been mag def because of to little feed and canna nutes does not contain much mag anyways

thanks for all the info you guys have supplied as the old saying goes its easier to fix an underfed plant than it is to fix an over fed 1

 

[supervaca]

I'd bet :
a) Raise to 0.8
b) it looks definetly like a PH issue, N is not absorving properly; adjust PH to 5.4 and let it rise to 6.1; then back.....
This lets the plant absorb all the range of nutrients....
SPECIALLY in dwc.
Doing this she should be ok in 1 week.... if we dialed...
My 2 cts....
Greetings from Spain.


EDIT: and you are starting to have Ca problems, too... wich water do you use???

 

[skotty]

ok guys here are some pics she is on .8 ec and ph 5.8 , you cant see shit under led lights and its not untill you take the plant out of the tent you notice any signs

this is new growth at the top of the plant

 

[skotty]

This is true but you have to judge it against ph
Ec down ph up to rich
ec up ph down =to lean

[/QUOTE]


ec down ph up = to rich??

ec down ph up = to lean

ec up ph down = to rich

my plant has gone from .8ec to .7ec in less than 24 hours im guessing i should add more feed and take her up to .9 ec and monitor her again

 

[jm420]

Never saw it mentioned about the LED till now, I;d start there

 

[skotty]

Never saw it mentioned about the LED till now, I;d start there

i dont think its the light mate i think its more my fault for underfeeding her, my other plant is doing good and my last grow did alright and the 1 before that aswell but they are all autoflowers except the last pic which was blue cheese 12/12 from seed and ive only been growing a year so im always learning

cheers