Fan leaves turning yellow with brown spots!

[Farmer Joe]

These two plants started flowering naturally outside here in FL. Now the bottom leaves are yellow, spotted with brown, and drying up.

Soil mixture:
Dolimite Lime
Blood Meal (N)
Bone Meal (P)
Espoma Epsom Plus (K)

The ratios of soil additives are added according to the instructions on the bags.

Water Source:
*Collected rain water.

Today I flushed with some rain water, that's about it.

 

[Farmer Joe]

I made the last post in a hurry, so if any of you guys need more info, just ask!

 

[ethereal]

what is the pH

 

[ethereal]

test the run-off from the bottoms of the pots and also the water going in (in this case rain water...yuck!)
better off usin the run-off from yer a/c unit brotha! its the same as usin reverse osmosis take advantage while its still summer and you have the thing runnin anyway....that tip saved me a LOT on buyin bottled distilled water, and distilled aint as good imo

peace

 

[sproutco]

How long have they been in this soil mixture? You have alot of magnesium by adding the epsom plus (sulfate of potash magnesia) and having dolomite lime in the soil. Calcium, magnesium, and potassium all compete with each other. You want more potassium than calcium and more calcium than magnesium. I don't really see your source of micronutrients. You may try feeding lightly (1/2 teaspoon per gallon of water) with something like peters (may be called Jacks classic now) 20-20-20 to boost micros and raise your level of potassium. Here is how to test your soil ph. http://www.icmag.com/ic/showthread.php?t=32760

Edit: If this is an all organic grow, you could use liquid seaweed for more potassium and micros.

 

[PazVerdeRadical]

hello farmer joe,

also, get some liquid humus and start feeding your plants that; the humus will help organize the organics in there. i am comming out of a similar problem myself, and was told about the humus by other kind growers here at icmag. good luck. have you checked for bugs? be well. peace.

 

[Farmer Joe]

How long have they been in this soil mixture? You have alot of magnesium by adding the epsom plus (sulfate of potash magnesia) and having dolomite lime in the soil. Calcium, magnesium, and potassium all compete with each other. You want more potassium than calcium and more calcium than magnesium. I don't really see your source of micronutrients. You may try feeding lightly (1/2 teaspoon per gallon of water) with something like peters (may be called Jacks classic now) 20-20-20 to boost micros and raise your level of potassium. Here is how to test your soil ph. http://www.icmag.com/ic/showthread.php?t=32760

Edit: If this is an all organic grow, you could use liquid seaweed for more potassium and micros.

It's an all organic grow, but I wouldnt mind adding something non-organic to get things back in check. Imma test my pH today.

 

[sproutco]

I was just going to add that potassium nitrate 13-0-44 is probably your best inorganic source of potassium instead of 20-20-20. I would try 1/3 teaspoon per gallon of water. This would give you about 160 ppm potassium and 60 ppm nitrogen. (ppm=parts per million) It has little nitrogen and is in the form of nitrate nitrogen which is good. I heard some brands of stump remover have this as the ingredient. You still would need a source of micros because I am sure your soil is low. That is why the 20-20-20 (1/2 teaspoon to a gallon of water) is desirable. You could alternate between the two. Like I said you want more potassium than calcium and magnesium.

 

[Farmer Joe]

I added some low strength FoxFarm Tiger Bloom this morning, seems to have a good source of micros/minerals. We'll see how things go.

 

[MynameStitch]

it looks like a slow nitrogen problem where it yellows then browns , the color of the tissue is dead tissue, not something that was caused by a ph issue or anything
this tissue was sucked dry and died

you do need to feed like sprout has sated, im sure its not a ph issue it doesnt look like it but i would definatly check to be 100% sure


also what lighting are you using and how close is it to the plant and what temps are your plant under? and RH?

 

[Farmer Joe]

What exactly do you mean by "slow nitrogen"?

These two plants are outside under the FL sun and the temps are probably around 90F. I have then positioned so they get mostly morning sun and some late afternoon shade when its the hottest.

 

[Watson853]

IMHO, Nitrogen def., maybe a little overwatering causing black splotches. Hit em with some hydro nutes according to label, let soil dry a little.

 

[Farmer Joe]

I forgot to mention, other than the messed up leaves, the plants look GREAT!

 

[MynameStitch]

slow nitrogen meaning that its just barley got enough and its sucking slow bits of nitrogen from the leaves, and since organics some of them are slow acting like bone meal and blood meal, would prove my statement about slow nitrogen deficinecy

beef up the nitrogen and you will fix this problem

i would also be feeding them weekly now with a balanced out nutrient

 

[Farmer Joe]

I added some Foxfarm's grow big and tiger bloom and they are doing good!

 

[teddybud]

glad to hear... wish my would get better :'(