Hello I am semi new to this. It's my second grow and the first was unsuccessful. The system is the SH bubbleponics. My problem is that on one of my plants the bottom leaves are browning, and tehr are some suspicious bumps on the lower stem on some of my others. I have attached pictures, any advice?
http://www5.snapfish.com/thumbnailshare/AlbumID=507051026/a=1000536026_1000536026/otsc=SHR/otsi=SALBlink/COBRAND_NAME=snapfish/
http://www5.snapfish.com/thumbnailshare/AlbumID=507051026/a=1000536026_1000536026/otsc=SHR/otsi=SALBlink/COBRAND_NAME=snapfish/