Leaves yellowing

Here we have 3 silver haze RQS.. I am now onto day 53 of flower (7.5 weeks)
This is a 9-11 week strain. Should the leaves be yellowing this early ? Nutes are pretty much full strength still this late on... what is your views on this people ? Here's a few pics....

Cleanfinish93 said:

Here we have 3 silver haze RQS.. I am now onto day 53 of flower (7.5 weeks)
This is a 9-11 week strain. Should the leaves be yellowing this early ? Nutes are pretty much full strength still this late on... what is your views on this people ? Here's a few pics....

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Two possibilities! Its just fall color, for now. I cut back on nutrients at this stage and instead focus mainly on watering with a Magnesium Sulfate like Fulvex, but again in light concentration. Watch the Trichomes as the leaves should finish a smooth faded yellow color on a strain like that, however the glands may start to diminish before the leaves finish their fall color. If it seems to be very premature in its yellowing you may be experiencing a need for more root space and too saline a soil from having to continue to max out nutrients causing Magnesium lockout which in turn locks out the flow of all other nutrients

If you post these things you will get more help

Nute type and over all ppm if you know it, if not link everything you use and at what stage
smart pots?, if so nute strength is the likely issue
Ph levels, and if you check it regularly if using reservoir
Root zone temps
Canopy temps
General humidity levels
medium type (coco?)
Light type, how many, the Watt of each and distance from canopy

As it's a 3 plant scrogg maybe 15 litre pots are too little because the buds are huge now! I am now week 9 flower, and your right there going a smooth yellow now and falling off the swell is happening daily though with just water ! See what you think?

Cleanfinish93 said:

As it's a 3 plant scrogg maybe 15 litre pots are too little because the buds are huge now! I am now week 9 flower, and your right there going a smooth yellow now and falling off the swell is happening daily though with just water ! See what you think?

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15L pots should be fine. I don't know what you mean by just water, have you been flushing or are you organic?. You need to give all the details I mentioned so that better advice can be given. They do look to be in good shape though. It's hard to tell from the pic, some parts look about done yet I can still see white hairs sticking straight out near the top. Any idea on finish times?. I may be jumping the gun but if you are flushing, it is likely a mistake.

Flowki said:

15L pots should be fine. I don't know what you mean by just water, have you been flushing or are you organic?. You need to give all the details I mentioned so that better advice can be given. They do look to be in good shape though. It's hard to tell from the pic, some parts look about done yet I can still see white hairs sticking straight out near the top. Any idea on finish times?. I may be jumping the gun but if you are flushing, it is likely a mistake.

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Sorry, I am bottom feeding through drip feed, in canna soil/perlite, using 1000 watts mix of cobs and hps, ph at 6.2, res temps 17-19degrees. I have been on just water for a couple of days its week 9 now and looking at 14 days of just water. It's a 9 - 11 week strain from seed shining silver haze. Sorry a tad high lol

I see, it just seems to be yellowing a little too soon. I am not very good with identifying issues from leaves but I do hope somebody can chime in a bit more.

I get the feeling that the soil/nute mix and bottom feeding drip rate might be reason behind the discolouration. Drip feed for example, if not set on the correct rate can start to starve the plant even though it shows no wilting issue. On the other hand if your nutrient is high in one area a build up can create a lock out, especially if ph in the soil is out of line. Is the drip system with no run off? if so the soil/synthetic mix, it is a very possible issue.

When you say you are water only now, what were you using prior?. Also, if you happen to be using synthetic already I would strongly reccomend using coco next time. It is a alot more PH stable than using soil with no microbes.

I currently use blumats, quite similar to drip feeding. It isn't easy to get right, at first the flow was too much leading to N build up (even though no run off). Now the flow is a little on the low side leadig to lighter coloured leaves than I would like, but I am continuing as a bench mark. It is very evident to me that flow alone (in none run off situation) has a big effect on plan health, not just nute strength. Having this mixed with soil and synthetic I think would be too much complication to know the issue.

I was using canna nutrients in canna terra pro soil, I stopped the nutrients now and just feeding straight water they are starting to swell internally I think now about 10 days off I think hopefully.. hairs are white at top from light stress but a couple inches down there nearlly ripe !