I currently have 4 plants in coco all fed from the same reservoir. I switched them to 12/12 almost 3 weeks ago and one of them has gained over a foot in height above the others and seemed to be going great until today. I have not changed the feed for a week now, but in the last 24 hrs a lot of the lower leaves on the larger plant have turned yellow and some of the top leaves are showing brown spots around the edges.
None of the other smaller plants are showing any of these symptoms at all. The ph in the reservoir is 5.8 before feeding and generally after feeding when the run off returns the ph is around 6.1
The temp is a pretty constant 80 degrees with lights on and 66 overnight. The lighting is a 900w Mars and a 600W hps. The plant that has stretched the most is predominantly under the led.
Any input would be greatly appreciated, thanks
I'm only taking a stab at this and don't take my advice without someone confirming it. With coco and this stage of growth and the pics I personally would say 99% Calcium deficiency. Coco is notorious for its effect on calcium uptake. I would suggest some calmag. Again please confirm this with others.
I'm only taking a stab at this and don't take my advice without someone confirming it. With coco and this stage of growth and the pics I personally would say 99% Calcium deficiency. Coco is notorious for its effect on calcium uptake. I would suggest some calmag. Again please confirm this with others.
Thanks, appreciate the reply. Have been feeding with calmag in the reservoir. Maybe I need to change the feed over a bit sooner. I notice the EC in the tank drops dramatically over 10 days
Thanks, appreciate the reply. Have been feeding with calmag in the reservoir. Maybe I need to change the feed over a bit sooner. I notice the EC in the tank drops dramatically over 10 days
Kinda looking like an N issue too so its possible its just overall nutes being low. Old leaves will not repair themselves so even once its fixed it will not change those leaves.
Anyone able to chime in on this who could be a lot more reliable of a source for him?
Kinda looking like an N issue too so its possible its just overall nutes being low. Old leaves will not repair themselves so even once its fixed it will not change those leaves.
Anyone able to chime in on this who could be a lot more reliable of a source for him?
Thanks for the input mate, really appreciate it. I've cleaned out the reservoir and upped the nute concentration a little, so I guess I'll just see if it gets better or worse, cheers