Yeah I got them as freebies as well....when trying to find out about black mamba it seems there are more than one strain with this name....is it the one with black domina/GDP ancestry?
I had some black domina in the 90s it was deadly.
"Strawberry Sundae is made with Cannarado's Sundae Sunset x Hazeman's Strawberry Cough. Depending on which is dominant, they can go 9 - 11 weeks after flip. Green Acres is made with Brisco's Black Mamba x Hogbackmagic's Punch Mamba [ Purple Punch x Black Mamba]. A great plant for big harvests...