first grow

this is my first grow.the strain is white widow they are a month old i think they are looking okay except for the tips of their leaves some are turning brown and drooping can any1 tell what the problem might be

The rusting of the leaf margins is due to over use of nutrients. What soil are you using? Are you adding nutes? If so what type (ppk ratio needed not brand name) How regularly?

I'm 2 weeks into my first grow (indoor) and I have a similar problem with the tips of some of my leaves (no nutes added yet, I plan on waiting until flowering). I bought a pH/moisture tester and found that my pH was too high. I've been adjusting the pH of my water with lemon drops so hopefully that will help. Being a newbie and afraid of overwatering, I think I was actually underwatering them. https://www.rollitup.org/cfl-growing/226917-grow-journal-first-ever-grow-2.html#post2909508