Any Ideas what these spots are?? Do I have to worry??

Does anyone know what the reason for these spots are?

Here is a full thread I started about this grow with more information.

https://www.rollitup.org/indoor-growing/296557-first-tent-grow-comments-advice.html

I suspect possible nutrient burn starting. Other than thos few spots all six girls look very good

Thanks in advance to all who take the time to help me.

Any insect issues? Look on underside of leaves for eggs.

do you mist your plants with the lights on what r u using for nutes and grow medium?

no idea but no reason to worry. If it gets worse post again.

Thanks for all the replies. I suspect it may be the beginning of Nutrient Burn. I use MG with slow release nutes. I have been told since my first post that MG is not the best choice so I will change on my next grow. I mixed it 50 / 50 with perlite so it flushes pretty good. For this reason I have been feeding diluted vegging nutes every third watering. At this point I have stopped the feeding at this point and I will monitor the girls for any improvement. I am waiting for a pocket microscope to be delivered and will then check for insect problems.

Once again thanks for the responses. This site is truly a goldmine of information!!

Doesn't look like nute burn to me. That starts at the edges and it will make the leaves feel crispy (the texture gets really off, you'd know it).