Growing loofah in Canada is possible by starting seeds indoors 4-6 weeks before the last frost, using a heat mat for germination, and providing a long, hot growing season with plenty of sun. Transplant hardened-off seedlings outdoors after the risk of frost has passed, ensuring they are planted in a sunny spot with a sturdy trellis or fence for the vines to climb. 
There is a ton of information online, to guarantee a successful harvest.
12 seeds per pack