bigsublimefan
Active Member
What is this? is it time to start running the cal mag?
So my leaves have these brown rust looking marks on them.
- Thread starter bigsublimefan
- Start date
Don't Bogart
Well-Known Member
Others will no better than me. But I believe Calcium and Mag are not model that is they don't move around. So that type of deficiency would be found more in upper leaves...I believe. Also your leaves seem to be curling a bit and drooping. Too much water?
Again others may disagree but if you add calcium you should add equal amounts of potassium. They both use the same "gateways" in the plant so they'll fight for space. Don't want one knocking out the other.
I had something similar happening to me 2 months ago and found my PH down to 6.0 maybe even lower. Added potassium and calcium in equal amounts and now everything is right as rain.
Again others may disagree but if you add calcium you should add equal amounts of potassium. They both use the same "gateways" in the plant so they'll fight for space. Don't want one knocking out the other.
I had something similar happening to me 2 months ago and found my PH down to 6.0 maybe even lower. Added potassium and calcium in equal amounts and now everything is right as rain.
ÒÒlegilizeitÒÒ
Well-Known Member
Magnesium is mobile, so it will show on the lower leaves first. Calcium is semi-mobile, so it will show up on new growth first, but can spread to old growth.
But to me, that just looks like you smashed the leaf between your arm and the side of the bucket or somthing
But to me, that just looks like you smashed the leaf between your arm and the side of the bucket or somthing
Don't Bogart
Well-Known Member
I new there were smarter people. I hunted around and found these notes.
Magnesium is phloem mobile and readily trans-located within the plant to actively growing plant parts acting as sink (White and Broadley 2009. Consequently, due to the high mobility under Mg starvation Mg deficiency symptoms typically appear on older leaves of the plant (Bergmann 1992).
Calcium is only xylem mobile, meaning it can only move up the plant, and once in place, it cannot be remobilized and moved to new developing tissues. Young developing tissues such as growing points and fruiting bodies tend to be affected the most once soil reserves are depleted.
Applying too much calcium and magnesium can cause a potassium deficiency; the K/Ca and K/Mg ratio should always be kept above 2 (but below 10, since too much K can hinder the absorption of calcium and magnesium). Too much potassium can also prevent the absorption of certain micro-elements, such as zinc. It is particularly important to take account of this interaction when using very hard water with a high calcium and magnesium content. (Bold italics are mine).
I just didn't want bigsublimefan to start throwing nutes in without looking at all the options. Looking out for each other. (Still think a little too much water
.I handle my nutes by testing my water. I've learned the hard way by guessing what is happening to the plants. A leaf turning brown or yellow or curling can mean so many things. I'm just not a leaf whisperer.
Kdoggy
Well-Known Member
Isnt he running dwc? Thats what it looks like to me so too much water looking would actually be a lack of sufficient aeration for reservoir temps but i cant see that from that one pic. I agree with Oo looks like a lid pinched leaf to me.I new there were smarter people. I hunted around and found these notes.
Magnesium is phloem mobile and readily trans-located within the plant to actively growing plant parts acting as sink (White and Broadley 2009. Consequently, due to the high mobility under Mg starvation Mg deficiency symptoms typically appear on older leaves of the plant (Bergmann 1992).
Calcium is only xylem mobile, meaning it can only move up the plant, and once in place, it cannot be remobilized and moved to new developing tissues. Young developing tissues such as growing points and fruiting bodies tend to be affected the most once soil reserves are depleted.
Applying too much calcium and magnesium can cause a potassium deficiency; the K/Ca and K/Mg ratio should always be kept above 2 (but below 10, since too much K can hinder the absorption of calcium and magnesium). Too much potassium can also prevent the absorption of certain micro-elements, such as zinc. It is particularly important to take account of this interaction when using very hard water with a high calcium and magnesium content. (Bold italics are mine).
I just didn't want bigsublimefan to start throwing nutes in without looking at all the options. Looking out for each other. (Still think a little too much water
I handle my nutes by testing my water. I've learned the hard way by guessing what is happening to the plants. A leaf turning brown or yellow or curling can mean so many things. I'm just not a leaf whisperer.
HydroKid239
Well-Known Member
Those lines are from the plant healing from physical damage.
Looks as if the leaf was folded. If that was the only leaf with that..
I wouldn't say it was due to a calcium deficiency. They are war wounds.
Don't Bogart
Well-Known Member
Boy do I bring it out of people.
bigsublimefan
Active Member
its weird because i am ultra careful and do not remember pinching the leaf at all.
Don't Bogart
Well-Known Member
They're probably right. Keep an eye on them. One leaf probably does not mean much... except rough sex.
The lines on the leaf do look like physical damage, (doesn't take much). My posts were because I thought you had tip damage. I now see it's just the light.
The lines on the leaf do look like physical damage, (doesn't take much). My posts were because I thought you had tip damage. I now see it's just the light.