Fill out a troubleshooting form (sticky in the plant problems section), and take pics of the whole plant.

The rust spots may be a problem, but the other one with the yellowing leaves might be ok. Again, hard to tell without pictures of the whole plant, but yellow leaves near the bottom/blocked from light will turn yellow and die throughout the grow.

Sorry I'm not one of the experts here, but with the form filled out and a couple pics of the whole plants, I'm sure you will get some answers in the next day or so.

Good luck:thumbsup: