Hi Cheesey Buds...
Well you can't take my advice because I'm proper new, still on my first grow and could be well leading you astray... BUT, I had this problem and this is the advice that was given to me.
Ensure the water is pH'd (you're doing that - cool)
Ensure the water is "tepid" not cold )tepid, not cool..lol)
Measure the EC of your run off to see if there is a nute build up (EC comes out higher than it went in)
Ensure your lamp isn't too close for seedlings... everyone says "12-18 inches from plant".. this isn't true until theyre a few weeks old and if they get dehydrated and heat stressed, they'll yellow..for plants that small, it should be 3 - 4 ft
eliminating the above won't hurt anyway as these things all need to be in check, even if it doesnt fix the issue outright.
and now the "positive" steps...
Coco is well known for giving cal mag deficiencies (this is usually displayed by a yellowing AND curling of the leaves - some describe this as "praying" for magnesium. Get some (epson salts) and add a pinch to a foliar spray (I just add sprinkles until I hit EC 1.25 - for your little plants I'd suggest more like EC 0.75-1) I also now add a bit of mag in the feed once or twice per week.
Yellowing can also be caused by Nitrogen deficiency. to treat this add a small (qtr strength) amount of seaweed extract (kelp) to the foliar spray...
I used the spray 3 or 4 times per day (spraying just after lights out is seemingly the most productive time) for 2 to 3 days and my plants look much better. I would also suggest trying the spray on one plant at first and or using lightly at first to ensure that youre treating the problem and not just making it worse :smile:
you should now wait until someone with proper experiance comes along to either confirm or correct what I've said
best of luck
j
Well you can't take my advice because I'm proper new, still on my first grow and could be well leading you astray... BUT, I had this problem and this is the advice that was given to me.
Ensure the water is pH'd (you're doing that - cool)
Ensure the water is "tepid" not cold )tepid, not cool..lol)
Measure the EC of your run off to see if there is a nute build up (EC comes out higher than it went in)
Ensure your lamp isn't too close for seedlings... everyone says "12-18 inches from plant".. this isn't true until theyre a few weeks old and if they get dehydrated and heat stressed, they'll yellow..for plants that small, it should be 3 - 4 ft
eliminating the above won't hurt anyway as these things all need to be in check, even if it doesnt fix the issue outright.
and now the "positive" steps...
Coco is well known for giving cal mag deficiencies (this is usually displayed by a yellowing AND curling of the leaves - some describe this as "praying" for magnesium. Get some (epson salts) and add a pinch to a foliar spray (I just add sprinkles until I hit EC 1.25 - for your little plants I'd suggest more like EC 0.75-1) I also now add a bit of mag in the feed once or twice per week.
Yellowing can also be caused by Nitrogen deficiency. to treat this add a small (qtr strength) amount of seaweed extract (kelp) to the foliar spray...
I used the spray 3 or 4 times per day (spraying just after lights out is seemingly the most productive time) for 2 to 3 days and my plants look much better. I would also suggest trying the spray on one plant at first and or using lightly at first to ensure that youre treating the problem and not just making it worse :smile:
you should now wait until someone with proper experiance comes along to either confirm or correct what I've said
best of luck
j