Flowering, leave edges yellow

[Blacks0113]

I have two plants which are both amnesia haze but the top leaves are going yellow from the edges in, the lower leaves are fine, any help please ill add pics

[MrC]

Probably gonna wanna fill this out fella, be easier for someone else to help you, lights off pics are gonna be asked for too, I know the drill now

Soil or hydro or coco:

Strain:

Photo or Auto:

plant age:

pot size:

has it been repotted? and when?:

soil type:

nutes or additives used and how often for soil:

Air temps (max min):

Res temps (max min):

humidity:

lighting type and wattage (hps, led, cfl):

Light schedule:

ph level:

EC (hydro and coco only)

Background EC.

feed schedule and nutes (for hydro and coco)

anything else you think may be relevant!

[Blacks0113]

The strain is amnesia haze from rqs iv got four altogether but only seem to be having the issue, there feminized photo plants grown in coco coir plus been in the same 12.5ltr pot from start lst'd all plants also started feed from beginning, grow micro and bloom which is general hydroponics, currently on a 12/12 light schedual dont really check out ec or ph as everything been fine from beginning two weeks ago i cut off all grow for tgem two plants and just fed it bloom and micro and thats where the problem started when lights are off ill take some better pics

[Herbitual]

You really need to fill the old template in from Mr C.

The only additional thing that I think maybe relevant is: how far away are your lights from the top of the canopy?

[Blacks0113]

Plant medium - coco
Strain - amnesia haze
Photoperiod
Plant age - 116 days from seed
Pot size - 12.5ltrs
Hasnt been repotted
Air temp - 16 at night 25 during day
Humidity - 34 during day 50 during night
Lighting type - hps at 400w
Light schedual - 12/12
Feed schedual and nutes - whenever hungry they get fed, so just say every 3 - 4 days, feeding them general hydroponics grow micro and bloom also giving them terpinator.
For the ph and ec stopped using them when i started tgis grow didnt have any problems untill two weeks ago when i completly stop giving them grow.
There are 4 amnesia haze in total but the other two are fine

[IceCalibur]

Plant medium - coco
Strain - amnesia haze
Photoperiod
Plant age - 116 days from seed
Pot size - 12.5ltrs
Hasnt been repotted
Air temp - 16 at night 25 during day
Humidity - 34 during day 50 during night
Lighting type - hps at 400w
Light schedual - 12/12
Feed schedual and nutes - whenever hungry they get fed, so just say every 3 - 4 days, feeding them general hydroponics grow micro and bloom also giving them terpinator.
For the ph and ec stopped using them when i started tgis grow didnt have any problems untill two weeks ago when i completly stop giving them grow.
There are 4 amnesia haze in total but the other two are fine

Hi Blacks0113, unfortunately in coco you can't just 'wing it' in terms of PH/EC ..at the very minimum you need a PH pen, some growers in time no longer need a way to measure EC (as they learn to read the plant and experience comes into the mix) but every coco grower needs a PH pen, without exception!

[Blacks0113]

Okay well iv got a ph pen ill start using it again, would u know any signs to look out for?

[IceCalibur]

Okay well iv got a ph pen ill start using it again, would u know any signs to look out for?

Well if I was in your shoes right now..I would be making sure my PH was around 6.0 ...in coco the 'max PH range' is between 5.5-6.5, but at the stage you're at now you can float between 6.0-6.2.

I would also be making sure I'm watering my plants and seeing at least 20% runoff at the minimum to avoid nutrient/salt buildup and PH issues.


I'd also be checking my runoff with my EC/PH meters to see if there is indeed a buildup of nutrients.. 'generally' if you're seeing higher EC numbers than you're a giving them, it means you're feeding them too much and you need to reduce what you're feeding them (usually accompanied by a low PH). If you're seeing lower EC values than what you're feeding them then it means they are hungry.

If you are seeing Higher EC values the best thing to do is to flush with plain tap water which will help clear any build-up and will raise the PH.

If the runoff PH is high then you need to do things slightly differently, the medium will still need a flush it's best to use Ph adjusted water to bring the Ph back into range

[Blacks0113]

Going to start using ph and ec meter again when next feed and also check run off thanks ill upload some recent pics

[IceCalibur]

Going to start using ph and ec meter again when next feed and also check run off thanks ill upload some recent pics

You're welcome ..those pots look a little dry, how often are you watering these girls?