Marshawn Lynch is getting one of the highest honors one can receive in Seattle -- a SECOND strain of weed has been named after the NFL star ... and we're told it's as strong as Beastmode himself.

We spoke with Nate "Diggity" Johnson -- owner of the Queen Anne Cannabis Club in Seattle -- who tells us that after the original "Beastmode" strain sold so well last year, growers wanted to up the ante with a more powerful strain in the hopes the Seahawks would get back to the Super Bowl.

The bet paid off ... and "Diggity" says the new stuff (called Beastmode 2.0) has 5% more THC than last year's Beastmode weed -- which flew off the shelves.

"It's a super pain reliever," Diggity says ... "And hits you just like Marshawn -- hard and fast."

Then after you smoke it ... FeastMode?