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Questions [Completed] What’s wrong

10 Posts
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Topic starter
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now what did or didn’t I do this is the only plant that’s doing this  the other plants look ok 

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5 Answers

I believe you have a ph issue here.  Unfortunately im not too knowledgable on soil growing or fixing ph issues in soil.  Hopefully someone will come along soon to offer more productive advice...  🙏 

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-Abraham Lincoln- kinda


Are any leaves starting to show browning on the edge?  If so, I am guessing this may be a potassium deficiency. A soil test could rule it out/in -- the K in the NPK is potassium .  If you need potassium, you can add it with a little wood ash, or banana peels (probably not practical for a top-dressing), or kelp tends to have a lot of potassium. Here is an article from @macky

Hope that is helpful. Maybe someone with more cannabis experience can jump in with their thoughts.  Bon Chance!

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Hold Infinity in the palm of your hand, And Eternity in an hour.
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Misher21 Misher21 Topic starter February 9, 2022 12:05 am

No none of the other leaves look like that but I will have to look in the morning at wake-up time

im_sparky im_sparky February 9, 2022 12:16 am

I think it may be starting -- but it is difficult to say with a photo. Check this out (bottom of photo):

Misher21 Misher21 Topic starter February 9, 2022 1:24 pm

Oh so should I only treat the one plant or all of them

im_sparky im_sparky February 10, 2022 3:22 am

If it were me, I would see what a soil test says before adding to the soil, but I would go ahead and give them all a foliar spray of epsom salts when the lights go off. 


Hi @misher21 I dont suppose the damaged leaf has been shaded from the light by other leaves has it?

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Misher21 Misher21 Topic starter February 9, 2022 1:23 pm

No it’s just on the one plant it’s on top so should I water with cal meg 


@Misher21 I’ve seen similar issues in soil that were caused by over watering which can cause some Cal/Mag issues. 

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Hey, @Misher, I looked more closely at your photos and I am thinking you may also be low on magnesium.  It looks like you have leavse starting to turn yellowish-green with green veins remaining -- is that right?  If so, I bet a light epsom salt spray (when lights go off) will green up those yellowing leaves in a day or two (I'd even water a little into the soil, too).  If you have had some heavy growth recently, you might be running out of nutrients and need to top-dress.  Cannabis can be hungry feeders.

To see a World in a Grain of Sand, And a Heaven in a Wild Flower,
Hold Infinity in the palm of your hand, And Eternity in an hour.
― William Blake


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