Here is the cast on I use for my Hot Damn Baby Hearts Afghan. The cast on for this blanket is 70 stitches with 5 stitches on each end kept in the garter stitch through out. Edited to add, you will knit 9 rows, not 10!
by Creative Grandma
by learnhowtoknitascarf
by Ratchadawan Chambers
by Ritiza Ishi
by Mimi Kezer
by oftroy
by WOOLANDTHEGANGsa