Donate Greens
Active Member
Hi Folks, long time forum user, first time poster.
I'm Having a few troubles identifying the cause of some leaf discoloration and die back in my current setup. Wandered if anyone here could help.
I'm running 3 clones of The Ultimate (dutch passion) that i selected from my last seed crop. all from the same mother. My setup is 3 14L bubble pots under 3 400w Hps. the tent is probably about 1m/2m/ and 6 foot high so im quite restricted in space and temperatures fluctuate quite a lot where i am but with careful air management and a thermostatically controlled heater my ranges are about 20c at night and 27c at day. maybe rising up to as high as 35 but on rare occasions. 4" Ruk inline and rhino carbon filter keep the air moving and good negative pressure inside the tent. Im about 5 weeks into flowering (day 35) and one of the plants is showing signs of what i assume is deficiency but i cant work out a fix. The feed cycle i am using is kind of complicated and to some extent i just give them what it looks like they need rather then sticking to a strict regime. But essentially its; Advanced Nutrients A&B Bloom, AN Big Bud, AN Bud Candy, AN overdrive, Orca micros, and a bit of silicon. Also tap water (non RO). since i switched them they have been on a low dose of A&B. probably about 2ml/L when i do res changes, which i have been trying to avoid doing too often this grow, iv'e generally been topping up the res with water containing just the PK boost and bud candy, no AB. as when the water level hits about half and i go to feed them, the EC has risen dramatically since i first fed them. I have been taking this as an indication that there is more food available to them than they require in the water already. I have been giving them slightly below recommended dose of big bud with every water top and res change up till about week 4, then swapped over to the Overdrive for the last week. they have also been receiving recommended dose of bud candy since start of flowering. its weird because they are all on the same feed schedule and clones, but the problem seems to be more severe in one than the others. but then again 14L pots arn't that large when the plants drink about 5L a day going full pelt, so maybe something got thrown out of sync with nutrient levels changing and salts building. The problem is a yellowing/paling of the leaves, tip burn and some necrotic spots on the leaves when you look up at the light through them. slight downward curl to the leaf edges on most affected leaves. it seems to start with the older growth, but only on the top part of the plant. Bud production seems good but a lot of pistils on that plant have begun to turn brown whereas on the others they are still mostly white. There has been a lot of bud production, but its a 9/10 week strain so i was hoping to run it for a while yet as they haven't properly swollen and i think its a bit early for fan leaf die off, which this kinda resembles. So symptoms include burnt tips and nutrient concentrations rising in the buckets as water level drops, but signs of deficiency. also i flushed them recently to try and rule out nute lockout.
I realise this i quite a long post, and pretty specific to my setup, but i just hope someone knowledgeable out there has time to read it and give me some suggestions. I like growing DWC but its hard when things go wrong and you dont wanna make things worse. ive had the same problem to varying degrees at about the same time through flowering in previous grows using this setup and nutes and i really want to get to the bottom of it.
Photos i have are kinda terrible but i will grab some better ones if anybody is interested in giving me a hand. Apologies if this has been covered elsewhere and i missed it.
Peace
I'm Having a few troubles identifying the cause of some leaf discoloration and die back in my current setup. Wandered if anyone here could help.
I'm running 3 clones of The Ultimate (dutch passion) that i selected from my last seed crop. all from the same mother. My setup is 3 14L bubble pots under 3 400w Hps. the tent is probably about 1m/2m/ and 6 foot high so im quite restricted in space and temperatures fluctuate quite a lot where i am but with careful air management and a thermostatically controlled heater my ranges are about 20c at night and 27c at day. maybe rising up to as high as 35 but on rare occasions. 4" Ruk inline and rhino carbon filter keep the air moving and good negative pressure inside the tent. Im about 5 weeks into flowering (day 35) and one of the plants is showing signs of what i assume is deficiency but i cant work out a fix. The feed cycle i am using is kind of complicated and to some extent i just give them what it looks like they need rather then sticking to a strict regime. But essentially its; Advanced Nutrients A&B Bloom, AN Big Bud, AN Bud Candy, AN overdrive, Orca micros, and a bit of silicon. Also tap water (non RO). since i switched them they have been on a low dose of A&B. probably about 2ml/L when i do res changes, which i have been trying to avoid doing too often this grow, iv'e generally been topping up the res with water containing just the PK boost and bud candy, no AB. as when the water level hits about half and i go to feed them, the EC has risen dramatically since i first fed them. I have been taking this as an indication that there is more food available to them than they require in the water already. I have been giving them slightly below recommended dose of big bud with every water top and res change up till about week 4, then swapped over to the Overdrive for the last week. they have also been receiving recommended dose of bud candy since start of flowering. its weird because they are all on the same feed schedule and clones, but the problem seems to be more severe in one than the others. but then again 14L pots arn't that large when the plants drink about 5L a day going full pelt, so maybe something got thrown out of sync with nutrient levels changing and salts building. The problem is a yellowing/paling of the leaves, tip burn and some necrotic spots on the leaves when you look up at the light through them. slight downward curl to the leaf edges on most affected leaves. it seems to start with the older growth, but only on the top part of the plant. Bud production seems good but a lot of pistils on that plant have begun to turn brown whereas on the others they are still mostly white. There has been a lot of bud production, but its a 9/10 week strain so i was hoping to run it for a while yet as they haven't properly swollen and i think its a bit early for fan leaf die off, which this kinda resembles. So symptoms include burnt tips and nutrient concentrations rising in the buckets as water level drops, but signs of deficiency. also i flushed them recently to try and rule out nute lockout.
I realise this i quite a long post, and pretty specific to my setup, but i just hope someone knowledgeable out there has time to read it and give me some suggestions. I like growing DWC but its hard when things go wrong and you dont wanna make things worse. ive had the same problem to varying degrees at about the same time through flowering in previous grows using this setup and nutes and i really want to get to the bottom of it.
Photos i have are kinda terrible but i will grab some better ones if anybody is interested in giving me a hand. Apologies if this has been covered elsewhere and i missed it.
Peace
