yellow leaves

lambokid

lambokid

Well-Known Member
hello everyone im growing in coco 70% and perlite 30% im using a 250w hps cool tube with 6inch extractor fan im using canna brand nute a/b im using cal mag i had overwatering problems about a week ago ive been PH my water and nutes at 5.8 to 6.1 ec has been 0.7 but my tap water ec is 0.3 on its own I know its really small for its age 23 days because I had overwatering problems at the beginning but the leaves are really light green/ yellowish and im not sure why I've gone up to 1.0 ec and still staying yellow and im confused to why please help they just started growing again but really slowly
 

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Trickyticky

Trickyticky

Well-Known Member
Hiya mate , your over feeding , .7 ec is a LITTLE strong , so 1 ec is far to strong for young plant like that .
The yellowing is another sign of over feeding . Stop the cal/mag . As you say your tap water is .3 alone so already has those minerals in it .
So lower ya feed to .5ec for a week or 2 and slowly increase . And cut out the cal/mag . That will sort ya problem out .
 
Gemtree

Gemtree

Well-Known Member
Needs mag pretty common with coco. Foliar feed them some epsom salt at 1/4 tsp per quart till the mag catches up
 
lambokid

lambokid

Well-Known Member
Trickyticky said:
Hiya mate , your over feeding , .7 ec is a LITTLE strong , so 1 ec is far to strong for young plant like that .
The yellowing is another sign of over feeding . Stop the cal/mag . As you say your tap water is .3 alone so already has those minerals in it .
So lower ya feed to .5ec for a week or 2 and slowly increase . And cut out the cal/mag . That will sort ya problem out .
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ok pal thank you for your help there going green and growing abit faster now think I've just got it right
 
Trickyticky

Trickyticky

Well-Known Member
Gemtree said:
Needs mag pretty common with coco. Foliar feed them some epsom salt at 1/4 tsp per quart till the mag catches up
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Only need the mag IF his water is soft . Otherwise if his water medium to medium /hard the cal/mag is not needed but always keep a bottle just incase
 
Gemtree

Gemtree

Well-Known Member
Trickyticky said:
Only need the mag IF his water is soft . Otherwise if his water medium to medium /hard the cal/mag is not needed but always keep a bottle just incase
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Yeah but coco locks up mag until it's cation is full so if the coco needed buffering it's going to need more calmag in the beginning. I use canna and find it varies by bag. I never buffer and sometimes they go yellow and sometimes not but a few sprays of epsom green them back up real quick. Only takes like two sprays a few days apart. It could be from overwatering but they aren't droopy and the leaves aren't wrinkley so probably not that.
 
Trickyticky

Trickyticky

Well-Known Member
concrete351 said:
never. you need to get 10-20% runoff, everyday water!
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Don't say never mate .
YES ya CAN .
Ya can over water little plants that are in big pots that havnt rooted out properly . Ya can suffocate the young roots IF ya keeping the coco soaking wet continually .
It's happened to me in the past and set me back a couple weeks
 
kovidkough

kovidkough

Well-Known Member
Gemtree said:
Yeah but coco locks up mag until it's cation is full so if the coco needed buffering it's going to need more calmag in the beginning. I use canna and find it varies by bag. I never buffer and sometimes they go yellow and sometimes not but a few sprays of epsom green them back up real quick. Only takes like two sprays a few days apart. It could be from overwatering but they aren't droopy and the leaves aren't wrinkley so probably not that.
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most commonly missed aspect to coco is feeding the coco calmag to buffer and remember as it dries out your EC will rise, I think common fertigation for multiple feeds is 4x daily without ill affect (decent root system as mentioned earlier), your better of feeding a lower ec more times then flooding and drying in coco.
cocoforcannabis.com has an excellent breakdown explaining all this
 
Red Eyed

Red Eyed

Well-Known Member
kovidkough said:
most commonly missed aspect to coco is feeding the coco calmag to buffer and remember as it dries out your EC will rise, I think common fertigation for multiple feeds is 4x daily without ill affect (decent root system as mentioned earlier), your better of feeding a lower ec more times then flooding and drying in coco.
cocoforcannabis.com has an excellent breakdown explaining all this
Click to expand...
Thanks for the link....getting ready to read through a bunch and soak it all in.
 
kovidkough

kovidkough

Well-Known Member
Red Eyed said:
Thanks for the link....getting ready to read through a bunch and soak it all in.
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I liked coco for a bit but have fallen in love with perlite as a medium , seems to provide alittle less speed of growth but easier to water hempy style. you really can't over water 100 perlite, but I keep learning and now might shift to promix on top perlite in the res. coco does vary from distributor, perlite pretty much always the same and way cheaper
 
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