I have two GSC autos that are in seedling stage. They have been above ground for about 5 days and growing beautifully. They overnight developed a white spot or two. The photo of this one, the white is on the tip. Could this be light burn? This is my first grow so advice is helpful.
Growing info:
GSC auto
Room temp: 78F
Humidty: 52%
Watering with ph 6 water
Coco coir/perlite
Light: 480 w led at 36” above plants
They’ve had one round of nutes, general hydroponics.
No nutes until first leaves (cotyledons) yellow and start to die.
A dome over them and watered with straight distilled or R/O water right now is perfect and you don’t need to PH distilled/R/O.
Thanks my friend…is it no nutes right now even in coco coir?
Coco contains no nutes and requires supplementing. BUT seedlings contain enough nutrition to get them going for the first couple of weeks and adding nutes now will simply set them back. Plant looks fine; keep a dome over it and mist the dome twice a day with distilled. That’s all they need. After two weeks or so transplant up and start a low dosage feeding schedule. Try to keep from over watering as cannabis does not like wet soil.
Do you ph the misting water for the dome? Seems like so little water actually used???
if using tap water I mean.@myfriendis410
I don’t use tap water. If I did you would have to adjust PH.
Ya I ph all waters added but thought making a a small amount for misting was silly but your prob right. May just buy a gal of distilled and use that until I remove the dome and the plant starts drinking fully through its roots.
The only caveat is some growers have concerns with high purity water scavenging micro-nutes from the substrate but I’ve never had any trouble. Low TDS water will instantly adopt the media’s PH. Whenever I water with nothing in it I don’t PH. Regardless of age.
My tap reads about 300 on my tds. Ph is about 7.3
