Leaves browning on edges

[rippa]

Someone help please.. PPM: 800 EC: 1.6 PH: 5.7 600w HPS

Edited September 15, 2007 by rippa

[Gazza2001au]

why is your PH so high? and what type of system are you using

[rippa]

OOpss.. typo on PH its 5.7.. Im using an aeroponic system

[Gazza2001au]

sorry cant help ya with this problem i havent encountered it before so wouldnt know how to help ya but u might wanna sent chato a PM he knows the in's and out's of aeroponic

[buddy.g]

Hi rippa love ya setup, you must have good presure to fire them sprinkler heads?

How long have you had it at these settings --PPM: 800 EC: 1.6

Looks to me like old nutrient burn damage. The new growth looks healthy its your older leaves that are suffering.

1.6 ec seems to me to be a bit high for the age of the roots (only just touching the bottom)

Maybe you last uped the nuts a bit too much but should be ok from now.

 

I must go look for more info on your setup. How often do you water?

 

Cheers

Buddy.g

Edited September 15, 2007 by buddy.g

[jimbojones5678]

I've no experience with diagnosing sick plants but looking at WantDaChronic's thread (deficiencies with pics) I would guess at either

1. Overfeeding/burning them a week ago - because the middle of the plant is effected.

2. Over watering - droopyness, unable to convert nutes. Maybe from your sprayers running too heavily or too frequently?

3. Molybdenum - which is only suggested as the written description seems to fit but the pics look different to me.

 

Is it on all your plants getting that food? Or just one? How has the ph and EC been over the last week or so?

 

The answers to those q's may shed more light on it.

 

Best of luck,

 

Jimbo

[rippa]

Hey buddy.. Yeah i have an onga pump working the pressure, not sure of the exact size pressure ect. but the sucka cost about $700 bucks. Been at these settings about a week after i did a refresh of the resi. I water 1 min on / 6 mins off. The picture of the sprinklers is an old picture, the root system is far more advanced than in that pic. I thought nuit burn myself but never had a problem at PPM: 800 /EC: 1.6 beofre.

[SukonmiSkunk]

ppms at only 800 is way too low.. run them at around 1400-1600... 1800ppm MAX... also youre PH could be too low aswell.. i run my PH at around 6.0-6.8...

 

what sort of medium are you using.. and how often are you feeding??.. what sort of system???

[rippa]

Sukonmi .. u recon it could be lack of nuits..?.. Im using clay balls and an aeroponic system.. look at the pic above of the system.. its an old pic, not a current one but displays the water delivery ststem. I water 1 min on / 6 mins off.

[SukonmiSkunk]

yep definitely too low then....

 

i dont grow in aero.. but id say that probably isnt enough feeding time...

 

others could give you the proper feeding times.. but ive always thought it was 15mins on 15mins off... im probably wrong tho...