Leaves going yellow and brown? Help? (photos)

[Happy Crash]

Hi everyone,

I'm growing my plants outdoor, and they've been growing steadily for the past two months now. Lots of water and a bit of nutrition every week. But since a couple of days I started noticing discolorations in the leaves. Not just on the bottom nodes, but in the middle and the top as well. When I looked closer I noticed most of the leaves showing a very slight discoloration. I attached a couple of pictures to this post, but since it's my first one on this board, I hope it works Can anybody tell me what's wrong with my plants and if they can still be saved??

Happy Crash Reviewed by Happy Crash on 07-27-2005. Leaves going yellow and brown? Help? (photos) Hi everyone, I'm growing my plants outdoor, and they've been growing steadily for the past two months now. Lots of water and a bit of nutrition every week. But since a couple of days I started noticing discolorations in the leaves. Not just on the bottom nodes, but in the middle and the top as well. When I looked closer I noticed most of the leaves showing a very slight discoloration. I attached a couple of pictures to this post, but since it's my first one on this board, I hope it works ;) Rating: 5

[Zandor]

Do a good flush; most likely the cause is Toxic salt build up. It's always safe to flush when in doubt.

[Happy Crash]

I've been flushing past week, but noticed no real improvement, the discoloration is continuing, could it be a lack of nutrients?

[stankystank]

too much nutrients cut back on what your giving it for a while they should be fine then

[Zandor]

If you have flushed then go back to feeding them again and watch.

[HARDDON]

At first glance the general yellowing looks completely normal for this time of season for an outdoor grow getting ready to flower.

The main grow shoot tips look normal healthy and green.

They just look like normal life and now death to those leaves.

However, the pic that concerns me is number 3.

That looks like a fungus / mold that attacks rose plants, some grape leaves and other heavily flowering plants that have a high nitrogen environment.

If it is mold or fungus, either you remove those leaves right now....do not cross contaminate at all.....carefully grab them and take off leaving 1/4 inch of stem.

Remove the removed leaves far from the rest of the grow.

Are these 3 different plants or diff views of one plant?

Are you growing any other flowers or fruit trees near this?

[Happy Crash]

At first glance the general yellowing looks completely normal for this time of season for an outdoor grow getting ready to flower.

The main grow shoot tips look normal healthy and green.

They just look like normal life and now death to those leaves.

However, the pic that concerns me is number 3.

That looks like a fungus / mold that attacks rose plants, some grape leaves and other heavily flowering plants that have a high nitrogen environment.

If it is mold or fungus, either you remove those leaves right now....do not cross contaminate at all.....carefully grab them and take off leaving 1/4 inch of stem.

Remove the removed leaves far from the rest of the grow.

Are these 3 different plants or diff views of one plant?

Are you growing any other flowers or fruit trees near this?

I have 5 plants of the same strain (PP) growing, they are not in contact with eachother. All of them show the yellow discoloration, only one of them shows the brown spots on a couple of leaves. I will remove them as you said, leaving 1/4 inch of the stem. The brownish leaves also show a pink vein line going halfway through the stem.

I only have a walnut tree growing nearby, and some non-cannabis weeds in the garden.

[fhydro]

I think it's a magnesium deficiency. http://www.overgrow.com/growfaq/1382.
It looks like this.
Fhydro

[HARDDON]

DOnt worry about the red vein....that just means the leaf is finsihed interacting in a two way road with the whole plant and is no longer taking in nutrients...only going out.

Keep us upated please.

Daily pics would be nice til you sort this out.

I still think its just a normal process.....but those spots concern me. I have lost entire rose beds to something that looks like that...a mold.

[Happy Crash]

Everybody thanks for your concern, I must add this is my first attempt ever to growing cannabis, so I do get a bit worried about my babies sometimes

I removed the leaves showing brown spots the way you told me to. I put the removed leaves in the garbage bin right away. so they shouldn't do any other plants harm.

The diffcult thing in this matter is that it could either be a fungus or indeed the magnesium deficiency (sadly I'm very unexperienced in this matter so I'll have to go by your best judgments), I will continue adding a regular amount of nutrients to the soil to see if there are any improvements as well.

Is this okay with you?