Need help with a diagnoisis

[weed_snob]

I have a plant that has begun to show yellowing of old leaves from the base to the top. The leaves lighten from the tips and edges inward, the viens loose color first. The tips brown and turn up and the leaves fall off without withering or loosing all color if just slightly touched.

any insight would be apreciated.

 

[stopthemadness]

Answers to four questions will help determine what your plants are experiencing:

1) What stage is the plant at?
2) What type of system?
3) What is the level of nutrients (EC or PPM's)?
4) What is the PH?

From the limited info so far I would say check the PH (always check first), check the roots for signs of rot and overwatering, check for magnesium or possibly potassium deficiency.

 

[weed_snob]

She is vegging, organic soil, she hasnt been getting additional ferts, i add 6.2-6.4 ph water,

I dont think its magnesium because the viens lost color, and it doesnt look ugly enough to me to be a k deffieciency, there isnt any rusting and the edges are unburned, My instinct says nitrogen deffieciency, but the lightning of the leaves is happning leaf by leaf and i think nitrogen would lighten the whole plant more.

 

[Sinfuldreams]

How Old, How big a pot are they in?

Sin

 

[weed_snob]

she a mother who was just transplanted

 

[bergerbuddy]

what your describing sounds a helluva lot like potassium... "tips of the leaves yellow, progressing to outer edges, with leaf tips bending UP and dying" Now I have found that often when I have a potassium problem.. its because my soil... or in my case, coco has it locked out.....

So IF you have been feeding reg... I would assume I have a lock up prob... I would give 1 good watering with JUST PH'd water, then I would give the next watering at 1/2 strength again at 6.3 if your in dirt... 6.0 for coco, 5.8 for hydro.... should do the trick.. the key is not to go back to so heavy of feeding, throw in a few more rinse cycles.. or rather...drop your whole nute strength by about 1/4...

peace

 

[weed_snob]

dont the leaves start to burn while still green with potassium defiecency? in any case since i know its not a nute burn and my ph is fine im just going to give her some light food and wait for the transpant to take effect. Unless its magnesium, which i ruled out, that ought to fix it.

 

[Sinfuldreams]

Well I just transplanted 6 just like that but worse!
This was due to them being in a red beer cup for lord knows how long!
Got em from a bud who just has too much goin on.

Not saying that was your problem but sure sounds just like my root bound clones.

Sin

 

[bergerbuddy]

dont the leaves start to burn while still green with potassium defiecency? in any case since i know its not a nute burn and my ph is fine im just going to give her some light food and wait for the transpant to take effect. Unless its magnesium, which i ruled out, that ought to fix it.

I have found that typically the leaf burn associated with potassium def. is caused when the plants internal temp increase higher than its ability to evaporte that heat, typically at the edges of the leaves. So the closer a plant with pot. def. to light source or lower humidity in room the more pronounced the problem becomes..... possibly showing burns on the edges of the leaves while most of the leaf is still green..
However if the plants are not particularly close to HID or the room is higher in humidity, pot. def. progresses similar to your description.. and by the time the leaf edges are burning the leaf tips usually down say an inch from the tips.. yellow out and dies.... even up to half the leaf or more...

Now I would expect you to see some necrosis before just seeing leaf edge burn on otherwise healthy leaves.. If it were the potassium def... if all you had were some burned edges on otherwise healthy leaves I would suspect either to low a humidity for the temp of the room or FERT BURN..

Peace... .let me know how it goes

BB

 

[stopthemadness]

snob - You sound like a pretty knowledgeable grower. You are right, defintely not a Mg deficiency and it does not sound like nitrogen. It does still sound like potassium to me. What is the temp in the room and what kind of lighting is she under? Bergerbuddy is right on about the effect of temperature on K deficiency, so if your room temp is pretty low and light intensity moderate to low (which I'd expect for a newly transplanted mother) it may be K deficiency that is masked by the low temp.

Does your soil have sufficient aeration? I assume its a soil mix with perlite? Make sure your soil is not holding too much water.

You have the right idea - flush with plain water and then feed with light nutes. Perhaps the soil mix was nute imbalanced? Unusual, but not impossible.

 

[Guest]

I have a plant that has begun to show yellowing of old leaves from the base to the top. The leaves lighten from the tips and edges inward, the viens loose color first. The tips brown and turn up and the leaves fall off without withering or loosing all color if just slightly touched.

any insight would be apreciated.

I think your gut is telling you straight....

It sounds most like N def...

ANd when you add how you have been feeding it fits....

SOme plants seem to yellow from the bottom up and some more overall....

If you have a choice here is where the kind of N makes a difference...

The best kind would be nitrate N... which is immediately available to the plant.... Here is where organics may work against you somewhat....

An appropriate foliar feed might be good...

 

[myhash maganja]

i would give them a small dose of potash.

 

[stopthemadness]

Agree. You should probably foliar spray with potash or a mild complete fertilizer.

 

[weed_snob]

hmm, well some follow. First thanks for the posts.

She has been growing better the past few days, shoots poping out everywhere. I think that her problem was nothing more than transplant and cloning shock now. I had been pretty agressive breaking up the root ball and she had been heavily cloned on the same day. Although my yellowing still continues it has slowed greatly, and only seems to persist on the leaves getting the most light when i put her under the hps. Under the floros the discoloration seams to stop.

If anybody knows that my plant should have recovered completely in a day or two or that root damage wouldn't do this let me know.

But if it doesnt get 100% soon i have to say the advice of a foliar spray sounds dead on, anybody know of a good seaweed based fert? I like things that i can use for more than one use, and i doubt i will be using chems soon and i dont want to bother with a tea. something with a small but even npk and a ton of trace elements would be best.

 

[stopthemadness]

Glad things are back on track! It is possible that nutrient deficiency symptoms will present anytime a change occurs to the root zone. I believe your hypothesis that the root ball was a bit stressed during transplant is likely correct. As for ferts, in my experience there is nothing better than sea kelp. Growmore Seaweed Extract is an excellent choice.