dextr0
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I’m also totally against advising anything other than ro myself personally I’ve seen and had too many problems when starting with other water sources.So could simply removing the softener solve the problem lol? =P
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I’m also totally against advising anything other than ro myself personally I’ve seen and had too many problems when starting with other water sources.So could simply removing the softener solve the problem lol? =P
Cheers for the replies. Coco is 70/30 Coco perlite mix (buffered).
Bottom of pots we're still quite wet last night, but felt like they needed watering further up, I just gave them a litre. Went light on the a+b nutes (20%) but added some calmag and some epson salts, ec was 1.6 (start of week 5), pH was 5.9.
Worth noting that problem with brown patches on upper leaves hasn't really got any worse over last 4-5 days. I'll keep adding the calmag to every water and a little epson salts once a week.
I read Aquamans watering guide, it suggested watering quite frequently though, but my work/home life makes that difficult, watering once a day or every two days (what I've been doing) is much more practical.
To be honest this has become a bit of side issue (although still important to get sorted) since the discovery of spider mites. Trying to get those pricks under control or it's game over anyway.
Sprayed See ya Mite (couldn't find the stuff OldManGrower recommended) but hasn't been effective. Last night out up 10 sachets of predator mites and ordered a pot of the more aggressive predator mite, so hoping they'll do their job, but they have mixed reviews.
Nice plants dextr0!
Thanks, quite an interesting read. I'm currently watering once every 2 days, so perhaps once every day instead would be a slight improvement. My lights on are 8pm-8am, so difficult to water several times a day.
My combination of using softened water with probably a higher sodium content and coco medium are probably causing me problems too, so that'll be corrected for next grow. I think I'm one of these growers that's guilty of using too many nutrients, thinking more is better, but it's not.
Some people skip a nutrient feed every now and again and just water with plain pH'ed water to flush out the old crap, might give that a go. Skip a nutrient feed once a week and do a flush watering instead? I'll measure run off EC when I water next, got a feeling it'll be very high.
I think your instinct that your lights are too close or intensity too high is correct.Hi all,
Growing a few plants in coco coir, feeding Canna nutes (in week 4.. feeding per 10 litre: 45ml A+B, 25ml Cannazyme, 15ml pk 13/14, 40ml Boost accel, and adding a little TNC Bactorr s13). Temps with lights on 25°c, lights off 20°c. Humidity around 45-55%. Had some browning on leaves and wanted a second opinion on cause. I think it may be light burn.
I'm feeding every other day, each plant is taking about 3 litres. In week 4 of flowering so using pk 13/14. Previously had what I think was potassium deficiency (brown leaf edges and some yellowing) so I started adding a small amount (.3ml per litre) of pk 13/14 in week 2, that seems to have gone away. Also had what seemed to be either nitrogen or manganese deficiency.. lower leaves were yellowing and turning brown. I've been pHing water to around 6.0-6.2, however I checked run off and it came out around 6.3, I read plants take up manganese at slightly lower pH, so lowered to around 5.6 for last few feeds, that seems to have helped, can't see any more leaves turning yellow.
However I've now noticed the brown patches on some top fan leaves. A couple of leaves at first, then a few more, and now even more. It appears to be spreading. Light is a 300w Lumatek Attis led, approx 350mm from plants. Was at 100%, turned down to 80% but problem still getting worse. Think it's too close to the plants. I can raise it, but only by 50mm or so. Is this a light problem and if so whats best course of action? Lower to 60%? I'm worried buds and leaves on plants edges won't then get enough light.
Another thing, I could be wrong, but I'm sure buds have slowed development since I noticed this.
The brown patches look a little yellow in the pictures, but they are browner in real life....
View attachment 1194468View attachment 1194469
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These aren't pollen sacs are they??
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I think you were right about your light intensity being too high. I don’t think in metric so I had to convert it. 355 mm is 14 inches. I have a 240W ViparSpectra XS-2000 and I’ve learned the hard way to keep it at least 20 inches above my canopy!Hi all,
Growing a few plants in coco coir, feeding Canna nutes (in week 4.. feeding per 10 litre: 45ml A+B, 25ml Cannazyme, 15ml pk 13/14, 40ml Boost accel, and adding a little TNC Bactorr s13). Temps with lights on 25°c, lights off 20°c. Humidity around 45-55%. Had some browning on leaves and wanted a second opinion on cause. I think it may be light burn.
I'm feeding every other day, each plant is taking about 3 litres. In week 4 of flowering so using pk 13/14. Previously had what I think was potassium deficiency (brown leaf edges and some yellowing) so I started adding a small amount (.3ml per litre) of pk 13/14 in week 2, that seems to have gone away. Also had what seemed to be either nitrogen or manganese deficiency.. lower leaves were yellowing and turning brown. I've been pHing water to around 6.0-6.2, however I checked run off and it came out around 6.3, I read plants take up manganese at slightly lower pH, so lowered to around 5.6 for last few feeds, that seems to have helped, can't see any more leaves turning yellow.
However I've now noticed the brown patches on some top fan leaves. A couple of leaves at first, then a few more, and now even more. It appears to be spreading. Light is a 300w Lumatek Attis led, approx 350mm from plants. Was at 100%, turned down to 80% but problem still getting worse. Think it's too close to the plants. I can raise it, but only by 50mm or so. Is this a light problem and if so whats best course of action? Lower to 60%? I'm worried buds and leaves on plants edges won't then get enough light.
Another thing, I could be wrong, but I'm sure buds have slowed development since I noticed this.
The brown patches look a little yellow in the pictures, but they are browner in real life....
View attachment 1194468View attachment 1194469
View attachment 1194470View attachment 1194471
View attachment 1194472View attachment 1194473
These aren't pollen sacs are they??
View attachment 1194474
Dexter for the win!! Thanks for taking the time to post real links that contain the information needed. Teach men to fish n all
You can figure all this out with a lil foot work and reading. Quick glance at dexters links gave me info that you seem to have missed.
You need the imput PPM and the out put PPM to figure what the Root Zone PPM is.
You need to change your water source. Yesterday.
You need Cal Mag in EVERY watering for your coco.
You can download apps that tell you your PAR and can take the guess work out of your lights mate.
And jeeezuzzzz thats a high PPM, thats above what i feed outdoors monsters in huge soil!!!
Green is right as well, sitting in runoff is a big no no, have your pots elevated in the runoff trays with drainage in the trays themselves. Your insane PPM needs reigned in, theres a tendency to want to do something more or give something more when there is issues and often that can cause more problems.
Quick quiz the questions are answered in Dexters link. Why would you want to water more frequently in coco?
HOW TO WATER COCO FOR BEST RESULTS.
Ok writing this cause i see this issue often and rather have a thread to link than explain this each time. This is not my work but a collection of info from many members here and I have put into practice myself. So first off COCO is NOT soil. For best results we want to keep it saturated...www.thcfarmer.com
The above thread by the excallent Aquaman should be your bible! read up, and next time BUFFER your coco to help with the constant cal mag needs.
Post some more pics, how we looking mate?