IS this a sulphar problem or something esle?

Howdy

Cann A+B
Rhizo
grown in coco
I have 2 400w duals going and my space is 90cmx120x120
Feed schedule is medium every 3rd day.
PH is 5.9 - 6
Temps inside temp 26-28 degrees celsius and RH is between 38 and 45%

What is going on here:

http://imgur.com/a/qLJwK

I woke up this morning and noticed lighter growth on all bud sites on this girl and on my vegging Afghan #1. This strain is just an auto Dr Feelgood.

I have had this in the past and people have told me its new growth but its always puzzled me. Could it be the conditions i am growing it under?

Its currently the middle of winter in my part of the world and my night time temps while lights are off drop quite a bit, havent gone in there to check but its freezing outside and my girls are in outside spare room.. During lights on it reaches 28 deg with a RH of 38-45% I cant seem to get the humidity any higher and at night i don't want to use a heater due to costs. My other girls seem ok for now but i noticed this one and my Afghan #1 both show the same thing, light green beginning at the centre of each leaf. I am using the same feed schedule like i have alsy done and i occasionally get this but then it goes away and i assumed it was just new growth.

Is it a sulphur issue? What should i do? Flush?

Try a foliar or tea... plants use up nitrogen in flower...growth appears lighter

Maybe a fulvic to help uptake nitrogen

So its a nitrogen issue then?

Scroga said:

Try a foliar or tea... plants use up nitrogen in flower...growth appears lighter

Click to expand...

What do u mean by foliar? And tea..what kind of tea?

I have this which i might use as a foliar spray.

Thanks for the reply.

Looks like an Iron def. which might have someting to do with your cold night temps interfering with nute absorption.High ph will cause it too,but you should be ok at 5.9-6.0.
in coco.

vigorous growth; it will darken up. consider a higher feed or two during this kind of explosive growth. nothing crazy.

HughDunit said:

So its a nitrogen issue then?

Click to expand...

nitrogen def. presents bottom-up.
not a nitrogen issue. no issue at all. vigorous growth is all. imo.

robro said:

Looks like an Iron def. which might have someting to do with your cold night temps interfering with nute absorption.High ph will cause it too,but you should be ok at 5.9-6.0.
in coco.

Click to expand...

iron def. - think, white leaves, interspersed among new and old growth. rather startling, and rare. by the time your ph is whack enough to lock iron, you have other problems.

Scroga said:

Try a foliar or tea... plants use up nitrogen in flower...growth appears lighter

Click to expand...

the only thing I spray is botanical soap, or bug nuke if needed. feed and care for your roots; your attention there, will yield more results......imo.

beef up the feed a bit. looks good. let it dry out between waterings, which it appears you are doing, but I always throw that in. I DETEST over-watering.

oh........that pot is bullshit. not enough root-zone. use cylindrical nursery pots, grow bags, bisected plastic drums.........

phos can get locked out due to cold enviro and the fluxuation of cold nights and warm daylight time . put a heat mat under the pots so the roots will stay warm they will handel the cold better . this is most likely whats causing the yellowing from stem side of leaf outward on the top of the plant . good luck .

Thanks for the replies, i would day its temp issue and just a massive growth spurt. Last night i turned off my extractor fan and only had one small bloiwing in there and the humidity rose and temps stayed at 28 degrees. Just had a look now and all my girls including this one seem to be responding well to increase in heat and %. The auto also grow a bit over night it seems..so yeah growth spurt.

Also i have had no issue with the pot i am using...been using them for small autos for nearly 2 years now.

I cant see a problem here mate don't change anything maybe try to keep temps under 26 for more weight.

Yeah i jumped the gun a bit here, its something (the light new green growth) i have always noticed and just had to finally get it out of my mind. It was just new growth in the end. This girl has grown a lot in the last 48 hours since i created this thread.