US music legend Willie Nelson has announced plans to roll out his own brand of cannabis, which he intends to make “the best on the market”.

The singer-songwriter announced in a statement on Monday that Willie’s Reserve will be grown and sold in Colorado and Washington, two states where recreational use of the drug is legal.

A release explaining Willie’s Reserve says it reflects Nelson’s appreciation for “the many varieties and range of the plant’s qualities”.

The release says 81-year-old Nelson will collaborate with master growers to define standards for the strain.

Nelson is a longtime supporter of marijuana for personal use and has spoken of its benefits for hemp production.

He has also pushed for the end of laws criminalising use of the drug.