Nute burn or defficiency?

[mashroom]

Indoor/Outdoor: Indoor

Growing Medium: Soil, perlite 50/50

Watering/Feeding Frequency: Watering every 3-4 days. Feeding every 3-4 days after watering

Nutrient Strength (PPM/EC): N (0) P (13) K (14)

PH Levels: 7.5

Air Flow/Fans etc.: Cooltube and fan

Lighting Type: 400W HPS

Growth Stage: Flowering

Plants Age: 3 months from seed

Cannabis Strain: White Widow

 

Hey guys

My plants top and bottom leaves are yellowing ever since i went into flower (2 weeks ago). Im not sure if its nute burn or a deficiency. My nutes are originally for hydro and the bottle does not mention nitrogen. It only says PK-13-14. It could mean nitrogen is 0 and might explain a deficiency. Im not too sure. In addition i gave a near full strength of it which people say you shouldnt do when using hydro nutes for a soil grow. Should i flush or give it nutes with more nitrogen? Or flush then give it the better nutes?

 

I have some pics which only show the top part of the plant.

 

Thanks

 

Edited March 20, 2011 by mashroom

[ConvexConepiece]

I'd say nitrogen def.

 

The first week of flowering I continue to use veg nutes as thats when they like to stretch and for that they need N.

 

Flushing never hurts so do that. You are using an A+B nute right? you only mention having P and K? sounds like your using an additive instead of flores A + B.

 

Also the PH is a bit high... quite high actually even for soil.

[mashroom]

Yes there was A+B nutes in the same product line as the one i got. The PK 13-14 must be additives then. After flushing can i add the new nutes straight away or should i wait?

 

Thanks man

[ConvexConepiece]

So what line of nutes is this your using? If it's canna PK13-14 you shouldn't be using it till the 5th wk of flowering. Other brands they say to use throughout the flower though.

 

Also you havn't mentioned the nutrient strength ie. measured with an E.C/ppm meter.

 

How about you tell us exactly how many ml:litre of what you are feeding with?

[Samurai]

hey there

bring ya ph down..best of luck...HM

[mashroom]

Im using Proganics Pk13-14. I cant tell you the strength though as i dont have a ppm meter. The directions are to use 5ml per litre of nutrient solution. However the last time i used it (about a week ago) was 5ml in 1.25 litres of water.

It also says to use at every solution change throughout flowering. So far ive only used it once though.

 

hey there

bring ya ph down..best of luck...HM

 

Thanks mate will get on it

[Dallas]

Yer as hydgemite said bring ya PH down and try around 6.2- 6.8 there abouts and maybe give it a flush and see what happens

 

All the best mate..

 

Dallas.

 

(edit) Mmmmm i just read into last post abit more and ya said ya only fed it once, maybe she needs a good feed

Edited March 20, 2011 by Dallas

[Uncle Chop Chop]

Proganics is good thats what use. As Gibbo said the PK is an additive you need to use the A+B flowering one and save the PK for a bit later on. As for the PH keep it in check. My motto is when in doubt flush em out it will never hurt them. Check your runnoff also,

 

Cheers Chops

[Cyclone]

Flush your medium well,

10L+ of fresh water.

 

Then go to the website of your nutrient product,

and follow the advice of what strength and additives,

in that stage of growth.

 

Doesn't look too serious tho,

browning of leave is generally the best indicator of burn.

 

Cyclone -