Second grow and once again got this problem but not sure what is causing it, must be someone out there who knows, spend several days researching and still cannot see a pic in order to compare to possibly solve the problem.

Flushed them for 3 days a week ago and added some Epsom salts as I think these are signs of mg def, howvever nothing has changed as they are still the same bloody colour and still dying off on the leaves.

Can anyone finally solve this, got to work out what is causing this, sick to the back teeth of this fucking problem, sighs.

Took a couple of pics, anyone know what im doing wrong, first week on flowering, green veins yellow leaves, looks like mg but it cannot be as it is still the same colour after adding epsoms. Not sure if underfeeding is at play, over feeding, no burnt tips on the plants.

Starting to move up the plants.

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Any help would be great, does anyone know a good book on deficiancies, so i can learn more, sod all on the web which is useful to be honest deficincies wise on websites, must of read the same article posted on most websites about 50 times, not helping.

can you take a photo of the whole plant so we can get an idea of the position and scale of the problem ?

Yup, will take a snap shot in a minute, wondering if potassium and mg is at work, looks like a mixture of the two, wondering if it is my water locking out these two nutrients, every grow i get this, larger plants effected by this.

Couple of pics of the whole plant, effecting mostly the tallest female plants, as for the one plant im going to chuck it, only tiny like a dwarf bottom left on one pic, heard of dwarf plants but never seen one till now, 8 weeks old.

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my guess is nitrogen def.

e2a : whats your ec? are you in flower yet?

When i asked bish last week he said is was nitrogen overdose rather than nitrogen def, so that is why i flushed for 3 days, then added some epsom salts as i didn't add any in vegging for 8 weeks.

Hmmmm totally lost now, might get a spray and add a bit of everything and foliar feed them, got canna nitrogen, pottasium, phosporous, calcium etc.

Might chance solutions possibly, this vitalink is as bad as ionic for defs, maybe try canna aqua and flores.

Ec was around 1.3 for 8 weeks, although with this strain I found out that red rizla had his ec on 1.6 to 2.0 on week 5, same system as mine, same strain, he had yellowing also until he up the nutes.

Currently on 1.7 and no burnt tips, been on that for a week, week 1 flowering.

Are the plants in this thread the same plants you posted about here?

Yup bish, should of added it to that thread, my bad.

Hi,

Sorry to hijack your thread but your pics illustrate my problem. I too have been going round the houses trying to identify what the problem is. May I respectfully draw your attention to my thread http://www.uk420.com/boards/index.php?show...amp;hl=nitrogen where you may find some advice (but no pics unfortunately). I've just updated it to say I found some J Bowers Dried Blood today (Organice Nitrogen feed) which I hadn't seen before. The pros don't seem to think this will be necessary but I'm going to give it a try. Good luck!

Am I missing something here? All the pics in post 4 look like classic Mg def to me.

If so, the Epsoms treatment should have sorted it out. Leaves showing the symptoms won't change back, but new growth will be fine and it won't move any further up the plant.

Again, sorry for the hijack...

I've tried Mg, at day 10 & 35 but still same probs. Admittedly, I've not been so strict recently cos I didn't think that was making a difference. Best I try being stricter! Thanks for the pointer

e2a: read a thread earlier where someone talked about mixing epsom salts in the soil with no ill effect, I think I'll try that next time along with a bit of fish mix Now if that doesn't sort it then it must be my environment, but I'll be beuggered if I know what part of that is wrong!

with espom salts its fairly vital to dilute into warm water...just thought i'd throw that in like!
i use 1 level teaspoon per 20l res diluted first in a litre of warm water.
that too,would be my line of attack,
whats your ph doing?rising?

Stu Sleeper, he's in compost so his pH is unlikely to be relevant. Good point about dissolving the Epsoms in warm water though, it doesn't dissolve well in cold.

Mrrichiet, looking at your profile I wonder what your lights off temps are, low nightitme temps can cause all kinds of odd problems. And Miracle Gro is widely agreed to be shite. And you mention diluting your compost with perlite and vermiculite, which is a bad idea. It doesn't seem likely that it's Mg in your case since you've treated that, but as I said in your thread, without pics we're really just guessing.