Soulja Boy I Hit The Weed MOTHER LODE!!!!

4/17/2012 4:47 PM PDT

Soulja Boy -- I've Hit The Marijuana MOTHER LODE!!!!

Apparently, Souja Boy is suffering from a pretty gnarly case of glaucoma these days ...

The rapper recently posted this pic of himself clutching an ass-load of pot ... while in front of a room filled to the brim with the sticky icky.

It's unclear when the photo was shot ... or where the photo was shot ... but DAMN.

Snoop Dogg just retweeted the pic moments ago during his weekly Puff Puff Pass Tuesday routine -- it's obvious he approves.

Calls to Soulja's rep have not been returned.

5:32 PM PST -- A rep for Soulja Boy tells TMZ ... the photo was taken inside of a marijuana dispensary in California earlier this month.

The rep says the shop is owned by Soulja's friend ... who invited him to come check out the joint. We're told Soulja was amazed by the inventory and HAD to take a pic.

Soulja's rep insists the rapper did not purchase any marijuana that day.