A system for aquatic plant processing includes a harvester, which includes a nozzle assembly and optionally a pump assembly; and a transport subsystem. Additionally or alternatively, the system can include and/or interface with any or all of: a conduit, a collection assembly, a control subsystem, a sensor subsystem, a pond, and/or any other suitable components. A method for harvesting includes operating the harvesting system in a set of one or more operation modes.