Well my lowryders are budding now. Ive got one really healthy plant that is budding nicely and has no yellowing. BUT, 3 of my other plants are starting to look like the pic i've showed below (brown/yellow dry leaf tips). And the budding on these effected plants are much slower.

Any idea what it can be? It looked like Mg deficiency. I've been spraying and feeding epsom salts for the past week, IT doesnt seem to be helping. Its just strange that one of the plants looks fine when ive been feeding it the same as all the others.

Any ideas? The temps are not too high either at 26 desgrees? Would appreciate any help cheers.

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I think you only should do that once and wait for an improvement
I wouldn't give it anymore anyway, but wait for someone who knows

Looks like a massive overfert to me.....and no amount of epsoms will correct that.

ATB

strange. ive only given 1.5ml of bio-bloom per litre.

THat's what I thought too

Is the affected plant near a fan or an intake?

The plants are rotated every few days so they are never in the same place for very long. its a good point though. and i have ordered another fan.

My point was....maybe the fan or intake is causing the damage?
It would have also explained the slow growth.

Strange one this when the others are okay.
Is the medium waterlogged??

ATB

i didnt know a fan could hurt the plants?

Waterlogged im not sure. Ive got very airy soil. Excess water does leak out the holes are the bottom. If it was waterlogged what could i do?

never knew fans blowing directly onto plants could cause this sort of damage, in fact didnt think it was a problem at all

It causes the transpration to dry quickly and cool the plant, if the ambient air is cool then the plant can become too cold and the growth stunted
I also find that a fan directly on the plant dries out the margins of the leaves and creates some spotting similar to LSF.


ETA - on a hot day or night, we all know the relief a decent fan can bring.
But sit in front of it for hours or fall asleep with one trained on you and after a while you are freezing

there seems to be quite a few thinks goin on there to me. definate N and P deficiency which may now be locked out or toxic. I'd quit it with the epsom salts for sarters. you say you are only feeding it 1.5ml per litre of bloom but this seems alot to me for a 300w. the directions for dosage with any feed is set as standard for 1000w light so you need to adjust your dosage. Right now I'd go to the lowest recomended dose, lets say it's 2ml per litre. I'd use a quarter of that which would work out the dosage for a 250w set-up. this way you would be just slightly underfeeding which is always better than over feeding unless you are very experienced or know the strain like the back of your hand.

then you need to flush the toxics out with a weak nute solution. so give them one quarter of the dose you have adjusted for your 300w set-up. this small dose will help them to use any usable nutes in the medium and prevent lockout.

you will need lots of run-off at this stage. I use eleven ltr pots which I know hold 1.5 ltrs of solution before it starts running off through the drainage. so, I use 2 ltrs per 11 in pot. this gives me 25 percent runoff with each watering. enough to keep toxic issues at bay. with your plants at the stage they are at I would do this two or three days running to completely flush out any nasties. then go back to the wet dry cycle.

just make sure the run off doesn't build up in the tray under the pot or they will draw this toxic run off back into the medium.

they should look better in a week or two at which point return to normal feeding. be nice to see some pics then.

cheers...E

okay cheers mate. i'm gonna give em about .5ml per litre and see what happens. gonna water the shit out of em for a few days and get all that nute crap out. then ill see what happens.

Hi there

good advise

can you put up an image of whole plant?

maybe one of plant in flower room / lights and fans

hb

its defo to mutch feed as the first dude said.peace

Don't you use oscillating fans fresh air inspector?

Itchy

Is this really true? Just I have never heard that before, are you saying that for instance when i'm on 4ml bloom under my 250w it should be 1ml per litre effectively quartering the dose

Any more experienced peeps able to corroborate this?

A reply but not from an overly experienced grower, but 'tis the summary of my knowledge so far re: feeding

1. What it says on the bottle is useful, usually for working out what is in it.

2. Check out OT1's guide posted elsewhere here for seedlings, this is the best rough guide you can get, but it is that, a rough guide.

3. Watching the plants gives you the best guide as to when and how much. These are reactive systems these beautiful (usually) green things. Yellow hungry , green fed. Start small (1/2ml measures per L) and build up, but only when there is a need.

4. Oddly less is often more. The more I've grown, the less I've reached for the nutes and the greener things have stayed.

Watering and air flow seem more critical, don't over or under water and get the air exchange going better than you think it should.
Like most weeds, put them in a good spot and they grow like buggery anyway!

I've re-read this and it doesn't really help much does it

re: Light size and reducing measures. I'm not sure that this is really relevant.
With lower intensity output, the growth is slower not stopped. Often flowering etc is lengthened so the need to feed due to medium being voided of feed is more important. Going by point 3 above and OT1's incremental suggestions (in reverse order of course ) and you wouldn't go far wrong. Just won't be what it says on the side of the bottle.

Best wishes in all your green efforts regardless

FrangiNeuron

p.s. I keep reading and watching as well just in case I'm wrong. I'm attending as many lectures as poss at the UK420 Universtity if Canna

hello good people.


well the yellowing seems to have almost gone from 2 of the 4 affected plants.

My next question is... there are some upper leaves on one of the plants that still has those dry/brown leaves, they seem too far gone and are pretty crumbly. Would it be okay to just cut them off? Or bad idea?