Here is a simple simulation of a Dandelion clock done in Maya. I used particle instancing for the seeds. Once they are instanced and planted using an emitter (using goal U and goal V), I delete the emitter, then proceed to simulate the flight using fields.
Right now there is only one vortex field, so the simulation looks robotic. Turbulence would do the job to create variety!
Got to rig the plant itself too!