We live in the Texas Hill country near Austin and have planted 50 white pampass grasses that are now 8 months old and looking very frail w/bent leaves and outer rim leaves dying off and most other leaves turning brown. Only a few are green throughout. It has been vey hot and we water twice a week and occ. once a week. We planted them according to the instructions and added some nutriet grains that are self disolving to last six months and we have not added more nutrients. Any help would be appreciated.