A mysterious yellow phantom - Pics included

High

This is my first plant. Afghan Kush Ryder.
She is 37 days old ,12" and is growing in a waterfarm hydroponic system, under a stupid 90 w LED UFO, and a 200 watt CFL. I keep her well ventilated with an inline fan. Maintain tempertures in the 70-75 F. /23-26 C. region. PH of 5-6. Humidity around 40-40 RH

She has no tolerance for nutes whatsoever. I tried feeding her last week, gave her just a tiny dose of Flora Series nutes, she hated that.
Her leaves curled down and the leavetips turned brown.

So I flushed her and replaced the water with ph adjusted tap again.

Now the edges of her leaves are turning yellow. Looks like a deficiency of some sort to me.
But I have not been able to identify it.

She looks hungry to me, but then again Ryders are very sensitive to nutes, or so I hear.
what do you think?







Thank you for your attention

Peace

if that particular strain is that sensitive to nutes, you dont really have a choice. let her go without nutes for a few weeks. let her get a little bigger, more leaves, etc. that'll help disperse any nutes you do give in the future. just go real easy with the nutes after she gets a little bigger. i'd cut the dead tips off, as they're doin you no good now. also, your ph should be around 6.2-6.8 - i'd also throw in more cfls on the sides/overhead, wherever i could get em'. cant hurt ya. other than that though, the plant is very lush

thanks for that man.

How would I go about cutting the dead tips off? Just snip off the dead parts?

yep, use a clean scissors and cut off the leaf matter that is definitely not coming back. not the yellow portions, or curled leaf tips, just anything that is dark brown and obviously will never be of any use to the plant