The -1 is the start times in minutes from midnight if a start time is needed. -1 means disabled. This matches the JSON output when viewing the programs using http://os-ip/jp?pw=xxx
Crop is a 0 or 1 for grass or shrubs respecticvely. If a zone is primarily flowers 1 should be used for that zone. Primarily grass or low growing plants (less than about 4 inches high) should use 0. This will denote which ETo value to use.