Suggestions for very distinct necrosis in spots?

[BernerS]

-Two saliva-dom strains, OG Ghost Train Haze #1 (which gets an A+ from me) and California Lamb Bread - two indica-dom strains not affected
-In ground in raised bed with low pH (could be major or secondary nute deficiency but not trace mineral deficiency)
-watering daily with dripper line
-showed up in the past 2-3 weeks, is not general all over the plant, mostly fans, and far from fatal.

Doesn't really look like normal leaf aging to me. Could it be insect-borne since it's on the leaf margins?

 

[vostok]

Avoid any further feeding if no rain for another 2-3 weeks then allow a hose to water the rootzone well, in an attempt to flush excess nutes away,
but this is really better fixed in the early days, as you say they are in the ground

 

[polishpollack]

I wouldn't worry about this. if it isn't wide spread, don't worry, don't do anything at all.

 

[BernerS]

Avoid any further feeding if no rain for another 2-3 weeks then allow a hose to water the rootzone well, in an attempt to flush excess nutes away, but this is really better fixed in the early days, as you say they are in the ground

You think it's burn?! I don't fertilize enough for majors or secondaries to be a problem. I've seen fertilizer burn and usually the damage is between the veins. I agree damage at the margins is suggestive. If it's overload, it has to be traces- - the pH is embarrassingly low. Hmm. Only thing I've put on in the past month is about weekly unsulphured blackstrap molasses, tablespoon in a gallon of water on a well-watered plant. Maybe that was just enough to push the traces over the edge.

It also sorta looks like early calcium deficiency shown here: http://www.420magazine.com/forums/problems-pests-disease-control/81275-cannabis-plant-pest-problem-solver-pictorial.html

I wouldn't worry about this. if it isn't wide spread, don't worry, don't do anything at all.

That's what's gonna happen this year no matter what. Just looking to edumacate myownself for future grows.

 

[polishpollack]

do understand ferts and pH? the more fert, the more the pH will be low. you say you're not adding anything, but that the pH is low. this seems opposite to what it should be. the plant is fine. don't do anything. good grow.

 

[vostok]

Often(imo) when planting in dry climates, (Zn) ..(Mn) and (Fe) def. show in late stages, and yes all at once, sorting which is particular to each is very difficult , so treat all as one and offer your babe a chelate cocktail, by adding a does of humic or even citric acid, this will also ease your worries over the falling ph, add the cocktail after the flush, the amount of chelate to use will depend on the size of your plant, and its maturity ..good luck

ps avoid that dumbass commercial weed site, although it has 1-2 interesting articles , never ...never mention any commercial component, or merchant, thats not on the jerks advertisers list ...lol
...or wait an see?

 

[BernerS]

do understand ferts and pH? the more fert, the more the pH will be low. you say you're not adding anything, but that the pH is low. this seems opposite to what it should be. the plant is fine. don't do anything. good grow.

Thanks for the response. I do understand fertilizers. I can promise you that my native soils have a pH in the range of 4.1 to 4.9 unfertilized. I agree leaching nitrogen fertilizers or organic matter can reduce pH, but there are other reasons, too, such as inadequate buffering capacity in the soil (sandy soils). Combine high organic matter soils with low buffering capacity, and the pH can get really low. I thought the soil in my raised bed had been conditioned, but I was wrong.

Often(imo) when planting in dry climates, (Zn) ..(Mn) and (Fe) def. show in late stages, and yes all at once, sorting which is particular to each is very difficult , so treat all as one and offer your babe a chelate cocktail, by adding a does of humic or even citric acid, this will also ease your worries over the falling ph, add the cocktail after the flush, the amount of chelate to use will depend on the size of your plant, and its maturity ..good luck

ps avoid that dumbass commercial weed site, although it has 1-2 interesting articles , never ...never mention any commercial component, or merchant, thats not on the jerks advertisers list ...lol...or wait an see?

Hey, thanks for the warning. Next year I'll be more systematic about my garden soil. It's done a job for veggies for quite a few years, and I got lazy. I may even do a soils test that may tell the story. It's always interesting to see how a soil drifts one way or another. A local soils scientist has helped me a lot. As for the flush, I've never done it and never had any bad consequences. I try to get the soil pretty much in place before planting and then only add little bits of organics during the growing season.

 

[vostok]

I've been assured that a flush is seen by the plants as a rain storm ....lol ..and yes a 'soil test' is a great idea for any outdoor grower,
I get my organics from the hippys down at my local river have done for years, wonderful stuff