sugar leaves turning yellow

[errorcode_11]

Problem: Sugar leaves turning yellow. I think they may be a salt build up i only recently got a ph meter and the ph ive been giving them is 6.5-6.6 I have now changed this to 5.8-6.2ph normally 6. I have flushed the plant with 2 gallons of water maybe 3 has i had nitrogen toxicity as you can see in the leaves did i use enough water when flushing I am using 5 gallon fabric pots (not American gallons). So my main question is are the sugar leaves turning yellow due to lack of nutrients or due to N toxicity.
.
Medium/grow method: Canna coco

Feed: and supplements used:1ml/l of sensi bloom coco A&B 1ml/l carbonload and 1ml/l of overdrive. (calmag if needed)

water source: 109mg/l of calcium.

Strain/age: day 58 of 80

light used: viparspectra 300w led grow light and fecida cr 600w

Climate: rh 40-50% temp 23-27 highs of 28.5

Additional info:

Should I reduce my N if its N toxicity or flush again.
E.g. use 0.5ml/l of part A 1ml/L for part b, carbonload and overdrive
or
Use 1ml/l of (calmag as it has a npk ratio of 2-0-0) 1ml/L for part b, carbonload and overdrive. (I added calmag here as part A added the calcium to the nutrients mix so I would balance it out with cal mag).
Or
reduce overall nutrients being used E.g. 0.5ml/l for part a&b , carbon load and overdrive.

Pictures :

 

[namvet25]

You will have some leaves turning color at this bloom stage so this is normal. just keep using cal/mag and bloom nutes at a low dose.It looks like you have a lot of vegitation that may be covering some buds so you may want to get rid of excess foliage.

 

[errorcode_11]

You will have some leaves turning color at this bloom stage so this is normal. just keep using cal/mag and bloom nutes at a low dose.It looks like you have a lot of vegitation that may be covering some buds so you may want to get rid of excess foliage.

oh okay cheers aha putting my paranoid mind to peace. Wouldnt getting rid of foliage cause the plant stress? ive got no idea myself though aha more asking.

 

[namvet25]

oh okay cheers aha putting my paranoid mind to peace. Wouldnt getting rid of foliage cause the plant stress? ive got no idea myself though aha more asking.

Just remove any fan leaves that are preventing light from reaching the buds and just do a few at a time not all at once.

 

[errorcode_11]

Just remove any fan leaves that are preventing light from reaching the buds and just do a few at a time not all at once.

cheers mate thats proper good info for me I thought with autos you could only defoliate in veg much appreciated g. :smoking:

 

[errorcode_11]

Just remove any fan leaves that are preventing light from reaching the buds and just do a few at a time not all at once.

i have removed a few fan leaves not all at once and not too many or too many at a time. I also removed 2 stems which was producing popcorn nugs and blocking light for bigger nugs was this a good idea?

 

[Proph]

i have removed a few fan leaves not all at once and not too many or too many at a time. I also removed 2 stems which was producing popcorn nugs and blocking light for bigger nugs was this a good idea?

Removing the fan leaves is why your "sugar leaves" are showing symptoms. Im pretty sure there is a nutrient lock out in the soil due to an excess of several nutrients. The plant is feeding off of the nutrients stored in the leaves since the roots cant access the nutrients in the soil ( because of the lock out).. When you remove the fan leaves, the issue spreads faster and to whatever leaves are left. They are pulling from the sugar leaves because that's the only option. Keep in mind that are mobile and immobile... Which means the plant will move the mobile nutrients to where it's most needed.. Immobile nutrients can't be moved, so their symptoms will get worse until the issue is resolved or you feed that nutrient through a foliar (which I don't advise in flower). You need a ppm/ec meter to flush.. There's no other way to know if you need to flush and/or when to stop flushing.