amneziaHaze
Well-Known Member
Low temp yes.rest i dont beleve happens on the lower branches.iron deficency is extreamly rare
Are these veins showing signs of calmag deficiency?
- Thread starter dopenixon
- Start date
Yup, I'd more inclined to suspect Mag aswell.
Iron would be visible in the new growth.
Phosphorus would be unlikely in veg, also the lower leaf symptoms don't really match.
But the Mag def will often first show itself by turning leaf petioles red,
then you would start seeing symptoms between the veins in lower leafs (like in the first pic) and/or cupping of the leafs.
Star Dog
Well-Known Member
Does any know or have any suggestions on what this could be?
@coreywebster thanks for the tip bud, using less with more applications if needed that's perfect!
Say for example magnesium is the problem how long after spraying does it normally take to see results?
The above is a old picture but ive plant yellowing and I'm still unsure about the cause, any suggestions?
Fwiw i gave it spray with epsom and/or calmag last week but i done more harm than good without solving it lol
Cheers bud
@coreywebster thanks for the tip bud, using less with more applications if needed that's perfect!
Say for example magnesium is the problem how long after spraying does it normally take to see results?
The above is a old picture but ive plant yellowing and I'm still unsure about the cause, any suggestions?
Fwiw i gave it spray with epsom and/or calmag last week but i done more harm than good without solving it lol
Cheers bud
coreywebster
Well-Known Member
Usually 48h you should see improvements if that's the issue.
Immobile nutrient deficiencies show up first in the new growth, because they can't be re-distributed within the plant.
So like in this case, newest growth is mostly affected. And considering the yellowing is starting from the base of leaf instead of tips,
this is usually a sign of Fe deficiency.
Most of your primary nutrients are mobile NPK, Mg, S, while Calcium can get re-distributed, it is considered only semi-mobile.
So in mobile deficiencies you would often see first signs in the lower parts of the branches/plant.
Plant would re-distribute necessary nutrients from older/lower growth to where it is needed and thus these would give the first signs.
Also with K,Mg,Ca you should pay attention to ratios and not just add more of these nutes blindly.
Because if there is too much of one, it reduces the amounts the plant gets the other two.
Low temps inhibit P uptake so you can run a little deficient there and get purpling as well.
By extractor do you mean exhaust fan? if so I could turn it down I was just nervous about not bringing in enough fresh air.
coreywebster
Well-Known Member
Yeah, the exhaust fan.