HELP! Hooked leaves

[plimpton]

Hey Guys
i am a first time indoor grower (outdoor for years} and i must say this world is a whole new ballgame
i'm at the beginning of my first grow.
Details:
48x36x72 grow tent
Likesun 1000w LED grow light
Promix soil
7 gallon smart pots {just transplanted from 6" plastic
Dutch Nutrients A&B Grow 1/2 strength
RH 48%
Temp 76 F
these are 5 weeks had temp and RH issues at first so slow start
my issue or question is that i have noticed a curl at the end of some of my leaves (see pics} i'm thinking either nutrition too much or my Rh issue in beginning
or is it something else

 

[Jordann]

If it's just a couple leaves I wouldn't worry if it doesn't spread to the rest of the plant. Could they have spent some time stuck under another leaf? Sometimes my leaves are stuck in a crook of stem and they grow into the shape it's stuck in, then holds the shape afterwards.

 

[vostok]

Hey Guys
i am a first time indoor grower (outdoor for years} and i must say this world is a whole new ballgame
i'm at the beginning of my first grow.
Details:
48x36x72 grow tent
Likesun 1000w LED grow light
Promix soil
7 gallon smart pots {just transplanted from 6" plastic
Dutch Nutrients A&B Grow 1/2 strength
RH 48%
Temp 76 F
these are 5 weeks had temp and RH issues at first so slow start
my issue or question is that i have noticed a curl at the end of some of my leaves (see pics} i'm thinking either nutrition too much or my Rh issue in beginning
or is it something else

you said it yourself ...RH 48%
dry air dries out leaf and tip as wet air dampens leaf lol

buy in a Rh gauge also called a humidity-stat

good luck