burning tips

[Budgiekk]

does anyone have some ideas on these tips they are burnt only right at the tip and all over the plant),also the colour has gone out of the plant lately

its a mother under a 400w avge temp lights off 22, on 28, ive had this problem for about 3 weeks

ive flushed it weekly , i hand water only when its dry(perlite) the lights about 40 odd inches i kept moving it away as the tips were burning...not helping. i only feed and flush with rainwater (i dont check my ph ....hmmm is this my prob )

heaps of airflow 12 litre pot .I just pulled one of them last week cause its clones were male and it had the same prob the roots looked good when i pulled it.

any help would be sweet

 

budgie

[BaronS]

wait for others who are more likely to be right but my cheat sheet says 'intraveinal yellow and purple stems' is immobile sulphur and probably due to PH.

 

You are growing in inert media, you need that PH tester as much as any other part of your system.

[Budgiekk]

cheers for the reply i am going to get a ph meter now ,last time i tried to get one from my hdro shop he said i didnt need one?

[Cactus]

what kind of sales person tells you that you dont need something theyre trying to sell... and when its something you need. I guess if they didnt know much about your grow, and I'm still yet to use my ph tester...

 

You dont have to fork out for a digital meter you can get yourself some litmus paper it should do the job if ya plant has been good up until now. Get the paper to see if ph is ya problem, then tune it up a bit I guess. If its your mum have you done anything different to it lately to make it unhappy? Is the rainwater a new thing? how is it collected?

 

I'm no plant doctor so still wait for a pro to jump in, just throwing some food for thought out there

[Budgiekk]

Ok so I got a ph meter yesterday!

My rainwater is 5.2

after grow nutes 4.1

after flower nutes 4.2

it's obviously to low I'm Goona up it

tonight

is it normal to drop ph after adding nutes?

I'm think I'm heading for about 5.8?

Is there a diff ph for flower/grow/clones?

 

Thanks heaps for the help

 

budgie

[BaronS]

I'm pretty sure the pic was picked up here, but it's worth putting in this thread maybe. At low 5s and 4s I'm surprised the plant is alive.

[flatcat_auz]

is it normal to drop ph after adding nutes?

I'm think I'm heading for about 5.8?

 

Thanks heaps for the help

 

budgie

 

Someone may correct me if I'm wrong but the nutes are for water with a PH 7 and when correctly added end up with the PH between 6.5-5.5.

I came to this conclusion after trying different brands of nutes and my tap water having a PH 7. Now after 'measuring' the nutes (i.e 5ml-10ltrs etc) and then using a EC to confirm that it was in the range, PH was always on the mark.

 

But that was without any additives.Some additives can have a marked effect on PH.

[Budgiekk]

Thanks fo the help barons , that pic is awsome yes look like it's lockout of nearly everything

I'll flush again tonight and adjust the ph

 

budgie

[SukonmiSkunk]

from those readings on the rainwater.. id say the PH meter needs calibrating... my rainwater reads around 7.. after i mix nutes it settles to about 6.0-6.3.. which is where you should be aiming at...

 

so just check the calibration of that tester... to be sure...

[Budgiekk]

Thanks sukonmi, I just got the meter yesterday

I thought it would come cal. How would

I go about calibrating it ordo you check

the ph against a control solution?

 

I just got some litmus paperfrom work

I'll check the ph with that aswell tonight!

 

Does rainwater ph alter at all (ph) due

to location environment or is it stable.

 

Damn I thought I knew where I was heading

thismorning now ..........

 

Thanks again for the help!