My cannabis leaves are dying 4 weeks into flowering!!!!!!

Whats your pH? Are you in soil or hydro? That far into flower, it's normal for fans to yellow and fall of thru a process called abcision. The plant will shed what it doesnt need anymore. But that will look more like the leaves on trees changing during fall. You have definite inter-veinal chlorosis going on. That first pic looks for all the world to be a Zn problem, or the beginnings of an Mg prob, but since it's the lower leaves, go with the Mg. Don't do anything until you rule out pH lock out.

As was said, ditch the foil. If you need a reflector, get a really white (titanium white) MATTE surface to reflect the light. You want diffuse light on the girls.

It's Mg deficiency....lowering yellow leaves, green veins, and margins are starting to get necrotic..N Deficiency would be a general chlorosis, not intraveinal. In regards to transition phase, you don't always have to flush in between phases...the plant takes at least a week or two after switching to 12/12 before its really in 'flowering' phase...during this time, plants still needs a little bit of the veg dosage...maybe 50% grow and 50% bloom first week, then 25% grow and 75% bloom second week before fully switching to bloom.

hopefully after 4 years he's fixed his problem hahaha

It may have been several years since the OP started the thread but since this is an internet forum instead of a personal messages or email, the posts have merit for all who view the thread regardless of date. I appreciated all who have contributed to the discussion thusfar.

Yikes,.. I will only respond this once, and anyone who wants to disagree with me, that's cool, there is room for you too..


If it were mine, I am increasing nitrogen next feeding.. she is fucking starving to death before your eyes. 4 weeks in is NOT time for yellowing.. heh.. exactly the opposite.

Chances are you switched to bloom foods right away.. next time go WELL into flower before you switch over to bloom foods and you will (assuming you have good drainage and reasonable PH fluctuations) wont be seeing any yellow leaves until they are just old and useless..

That's just me, everyone else's mileage may vary.. but my guess is to feed her a few rounds of a moderate dose of an all purose type food, you'll see her respond accordingly.


Always a shot in the dark, from what I see and know at this point, that is what I would do,

I mean considering these plantts were harvested years ago.. but IF we had a time machine.. *rubs hands together*..

My friend has a weed plant going on 2 weeks into flowering and he moved them to a different place and the plant just started to curl and the leaves looked like they are dying and changing colors with white spots.is the plant going to die so we can dry it up??

leaf canoeing is caused by heat,has for leafs dieing of at week 4 just think has it has autum/fall in your room if your leafs are not yellow by the end of a grow then you feeding to high nitrogeon

Time to revive. My leaves keep drying up they turn a dark green and then curl in on themselves what do I do

William Taylor said:

Time to revive. My leaves keep drying up they turn a dark green and then curl in on themselves what do I do

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Start a thread in Newbie or Plant Problem forum.

But this one is already here lol there are too many are my seedlings ok posts and shit for most most new posts

William Taylor said:

But this one is already here lol there are too many are my seedlings ok posts and shit for most most new posts

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Who knows, move the lights futher away or maybe better extraction, could be too strong a wind or over ferted.

Like diagnosing problems is not for me, i have my own grow to contend with but pictures and details in a new thread might get some kind of response.

This threads been over revived its hard for peeps to focus

zamora0102 said:

My friend has a weed plant going on 2 weeks into flowering and he moved them to a different place and the plant just started to curl and the leaves looked like they are dying and changing colors with white spots.is the plant going to die so we can dry it up??

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Sometimes when you move a plant (especially far away) they get home sick and act all weird - cannabis plants are a lot like cats that way, except of course that you can't smoke them... well you could, I suppose but I think that's against the law in most countries, and besides it makes PETA people cry.
I once knew a girl named Zamora, she had a lot of cats, but I didn't mind cuz she was hotter than a two-dollar pistol.

I love zombie threads, always good for a laugh ;?D

William Taylor said:

Time to revive. My leaves keep drying up they turn a dark green and then curl in on themselves what do I do

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What are you Temps,Do you have the fans on the plant ,

The same thing is happening to all three of my flowering plants...and they're all a different strain of weed. Once the plant goes into flowering stage, the leaves die off...nothing to worry about. In fact, you can go ahead and cut all the fan leaves off if you want, nothing bad will happen. That's why when in flower, nitrogen is really no longer a needed element. I've cut all the leaf off of a plant and left them on others and the end results were about the same...same amount of bud, same size & density of buds. One year, all my leaves turned so dark purple it looked black. Every leaf, including the sugar leaves close to the buds looked black as the buds were light green and white from crystals...so I called it Black Dahlia...ya, no worries about the leaves once she's full into flowering mode. One plant I already cut down, all the leaves, even close to the bud, dried up and turned brown, but the bud remained fine...had me worried a bit because it looked like moldy bud...after hanging it up for two weeks to dry, then trimming the sugar leaf off all the buds before jarring them up for curing, everything was fine. Don't fret...it ain't a guitar.