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Not sure whats wrong.
URbanGrownstarted grow question 4 years ago
Hi guys and girls this is my first time growing in COCO so i might need some advise.
On one of my girls (Gelato) the lower leaves have lost there colour and dried out.
Is this Ph fluctuation or a Cal Mag issue ?? or is it something else ??
like
CheckThoseTrichsanswered grow question 4 years ago
Heya Friend!
Had a look at your diary and noticed two things!
1. Are you using any organics in your coco mix? At this stage of life I usually feed 250-350ppm. pH is a little high, for coco we want to make sure it is between 5.3-6 pH or the plants won't absorb all the necessary nutrients. This is what could be causing the fading colours.
2. Temp and humidity don't match up with the VPD chart for cannabis for veg. They will need a little more humidity, for temps in the 23-25 degree range try upping the humidity to 65-80%. Here is some more info about VPD: https://www.dimluxlighting.com/knowledge/blog/vapor-pressure-deficit-the-ultimate-guide-to-vpd/
Make sure the pH is in the correct range and try to bring humidity up a little with a humidifier, wet towel on fans or bucket/container of water in front of a fan. Make sure you are always supplementing with calmag with coco as well, I always add 100ppm calmag before any other nutes.
Good luck and cheers
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