And the message from authorities is 'leave the nasties behind'.
Moving Day involves the mass transporting of cows and machinery around the country's roads as farm contractors relocate themselves and their stock in time for the new season.
While there are many really dedicated farmers and contractors who rigorously clean their gear to protect the next property they're moving to, not everyone is as committed, according to Waikato Regional Council.
The recent discovery of the highly invasive velvetleaf on two new properties in the region was a wake up call for the ag sector.
It spreads easily through unclean machinery and the council is keen to stop it in its tracks.
So landowners must insist only clean machinery enters their farm gate on June 1.
