Please I need help my plants!

[sativalicious]

Great discussion.

About zink deficiency....

Different type plants will react somewhat differently to a deficiency than others....

But for zink def... one of the common ways plants respond is by an appearance they are stunted....

This is caused by reduced internodal elongation....

the nodes get stacked uptogether... this is called rosetting....

Amazing what I can learn by reading other people's threads...

So for example, I have 23 nodes in under 36 inches (18/6).
I also had some of the other characteristics mentioned
for the leaf. I thought the shorter internode distance was
a result of 600 watts and a good reflector as close as possible.

Until I get further down the road, I think my issue was pH-related.
Is that conceivable ... that zinc can be locked out as a
result of a pH problem?

Can short internode distances be primarily determined by genotype,
in specific instances?

 

[MynameStitch]

Yes definatly zinc can be locked out as for any other nutrient; but it is rare to see zinc as a problem and is most definatly caused by a flucuation or ph issue. Never seen it be caused by a nutrient deficiency.

Cannabis does need zinc but in very small amounts so when the small amount does get locked out you see the problem.

 

[Guest]

Great discussion.

Amazing what I can learn by reading other people's threads...

So for example, I have 23 nodes in under 36 inches (18/6).
I also had some of the other characteristics mentioned
for the leaf. I thought the shorter internode distance was
a result of 600 watts and a good reflector as close as possible.

Until I get further down the road, I think my issue was pH-related.
Is that conceivable ... that zinc can be locked out as a
result of a pH problem?

Can short internode distances be primarily determined by genotype,
in specific instances?

Zink deficiency is commonly called little leaf.....

I should have mentioned this before but th 2 most important things IMO is that the new growth has both stunted smaller leaves and stacked internodes....

And when I say that I mean there is no distance between.....

I would be inclined to see zink def where it was used in something like peat and the micronutrient was missing from the fert used....

Zink according to the availability chart is quite available over the common range of ph values normally associated with growing cannabis......

Im probably less enthralled with the term lockout than many others here....

unless you are using way too much of some element....


http://www.icmag.com/gallery/data/500/5774Nutrient-Uptake-and-pH.jpg

 

[sativalicious]

Thanks! Yet Another Great Chart. I will save.
I like this one and had not seen it yet.

So, if nutrients are provided in a feeding solution which is too alkaline, then it seems one could infer from the chart that Phosphorous can become subject to deficiency (lock out), too, in addition to specific trace elements. Would such a P def manifest itself as the red stems and petioles?

Also, on the same plant, some (in my case, older large fan) leaves could be very dark green due to the larger uptake of whatever nitrogen it could find. The same leaf could also be twisted; perhaps from the P def which (i speculate) retards stem growth, such as the main stem down the center of each leaf finger (still speaking about the larger, older, dark green fan leaf).

From my limited experience it seems wise to err on the side of acidity, as opposed to more alkaline conditions. Though, I still have a lot to learn.

PS: IANAC

 

[Guest]

Phosphorus is one of the keys.....

Thats apparently the key to the best ph range.....

Phosphorus doesnt necessarily have to be at its most available ph just a ph which makes the element available enough......

I think thats 6.0 to 6.3

According to canna....

the red stems and petioles thing is not associated with p def.....

on that point I will take their word.....

they have a lab.....

 

[sativalicious]

Yes, thanks a lot for keeping me on track.. and the clarification about the red stem discoloration. Citing the reference of Canna labs for the information makes it easy to accept too. Now. I can build on that.

I should note that I was primarily driving my speculation -- based on real observations, of course -- with the water-culture side of chart. Since I am in soil I should probably not do that. I was probably acting like a bad data set in search of a chart that matched my misconceptions. LOL!

As you seem to also clarify, this chart is about the medium and not necessarily a chart of a particular plant's needs. Is that what you meant?

Recently, my targets for feeding have been in the 5.8-6.0 range as I tried to remedy a problem (which I assumed was alkalinity) that also looks similar to other people's issues (except for foliar which I was already dialing in at 6.2).

So, that I can also participate in deriving conclusions based on this chart, I too will start using only 6.0-6.2 pH feeding/water solutions and observe.

Many thanks.