DopeyDooby Posted July 7, 2023 Share Posted July 7, 2023 Hi all. I've looked through as many pics as I can find on leaves that look like this but still unsure what the problem is. Can anyone enlighten me please? It's a super silver haze and nearly into it's 3 week of flowering. Using Canna coco nutes, canna boost, rhizotonic and cannazym. EC is kept a bit below recommended (0.8-1.0) and temps are between 20c and 25c. Link to comment Share on other sites More sharing options...
BushDoctoR Posted July 7, 2023 Share Posted July 7, 2023 Pic of whole plant? 3 Link to comment Share on other sites More sharing options...
Shumroom Posted July 7, 2023 Share Posted July 7, 2023 Hiya @DopeyDooby Yeah a full plant photograph or two will also help with the diagnosis I was wondering what lighting you've got the plant under? I know you mentioned coco nutes, does that mean it's growing in coco? Atb 1 Link to comment Share on other sites More sharing options...
catweazle1 Posted July 8, 2023 Share Posted July 8, 2023 (edited) It's moved a bit of magnesium or other mobile mineral. That's what the brown spots usually are. If it's on the lower leaves, it's pretty normal I find. I think, sometimes there's a variation in the flow of nutes, roots got cold or temporary change in the nute mix, and that's how a plant deals with it. If you see a definite pattern of it progressing up the leaves, there's a longer lasting problem that needs sorting. Edited July 8, 2023 by catweazle1 1 Link to comment Share on other sites More sharing options...
sweettooth Posted July 8, 2023 Share Posted July 8, 2023 @DopeyDooby you've mentioned temps, what's your humidity like, more than often your temps are too low, and humidity too low. try and aim for 27 lights on and 65 RH% and keep lights off at 24, doesn't matter too much at this stage about lights off RH%, that strains a longer flowering so you've got quite a few weeks until you need to worry about RH%. as long as your airflow good. been using led a while now (assuming you are as I never get these issues under hids) and its always environment related. could do with upping your ec a tad too. when reporting issues always include as much as you can: lighting including distance from plants medium & potsize environment - temps and RH% (I never bother myself) but EC & PH Full photos. Is it just one plant or all of them? 3 Link to comment Share on other sites More sharing options...
mysticriver Posted July 8, 2023 Share Posted July 8, 2023 EC seems a bit low for me, coco, led, week 3 flowering, I would want my EC to be around 1.5 mystic 4 Link to comment Share on other sites More sharing options...
DopeyDooby Posted July 8, 2023 Author Share Posted July 8, 2023 wow thanks all for your inputs!! Lights are off atm but I'll up a fuller picture later. 1 Link to comment Share on other sites More sharing options...
Mr mcgregor Posted July 8, 2023 Share Posted July 8, 2023 calcium or ph spots. hows your roots? over watering is possible in coco, and them spots are usually a sign. why all the boosts and potions ? they grow well enough with just grow a&b ,in veg and then bloom a&b ,try it you may be surprised. 1 Link to comment Share on other sites More sharing options...
DopeyDooby Posted July 8, 2023 Author Share Posted July 8, 2023 (edited) Thanks again all for your help! Greatly appreciated. So I've just stuck a wee heater in there so will start trying to get the temp up a few degrees. Ph is always between 6.2 - 5.5. In 20L fabric pots in coco coir. Humidity is 85% atm but I can drop it down a bit later with a dehumidifer. LED 300w lights about 1.5/2 feet as I thought it might be burning from lights. Also thought it might be wind burn but all fans now point up or against sides and not directly at plant. It's also only a few leaves over the 4 plants. The majority look nice and green and healthy. 3 hours ago, Mr mcgregor said: calcium or ph spots. hows your roots? over watering is possible in coco, and them spots are usually a sign. why all the boosts and potions ? they grow well enough with just grow a&b ,in veg and then bloom a&b ,try it you may be surprised. I'll drop the extras and stick to the A+B from now on then thanks. I guess in this case, less is more Could be overwatering as I have been watering every day recently (have dropped it to once every 2 days recently) I did add a wee drop of calmag into the mix a week or so ago, but small amount cause I'm always paranoid about over feeding, which is why I kept the EC low. Hope this info (and photos below) help with the diagnonsis. Edited July 8, 2023 by DopeyDooby Link to comment Share on other sites More sharing options...
Devon Cream Posted July 8, 2023 Share Posted July 8, 2023 Your ec seems a little low for 3rd week I use canna coco and I know all plants are different but I’d be 1.5 to 1.6 at this stage what’s your ph when you mix up. 1 Link to comment Share on other sites More sharing options...
DopeyDooby Posted July 8, 2023 Author Share Posted July 8, 2023 (edited) 17 minutes ago, Devon Cream said: Your ec seems a little low for 3rd week I use canna coco and I know all plants are different but I’d be 1.5 to 1.6 at this stage what’s your ph when you mix up. Usually just under 6, but I'll up the EC now thanks Edited July 8, 2023 by DopeyDooby Link to comment Share on other sites More sharing options...
Danny killerZ Posted July 8, 2023 Share Posted July 8, 2023 Good veg efforts for a 300 watt attis pro 1 Link to comment Share on other sites More sharing options...
DopeyDooby Posted July 8, 2023 Author Share Posted July 8, 2023 21 minutes ago, Danny killerZ said: Good veg efforts for a 300 watt attis pro Lumatek ATS300w Pro Link to comment Share on other sites More sharing options...
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