Some of the grain seeds in tombs in Egypt grew after 3000 years. Don't give up.

I had 5 seeds planted in a pot, two sprouted after about a month...They were about 2 inches tall when I watered them too hard and killed them both. (Ya, dumb^$&.....NEVER pour water over your seedlings!) Anyway, That was about 2 months ago and for some reason I kept watering the pot.....Wishful thinking, I suppose, but it paid off! I now have another little rose that sprung up. These seeds were from the very same pod. Don't give up! I've heard it can take years to get a seedling depending on the rose variety.

I had some in the fridge take a year to sprout and about 20 sprouted at once, it just depends on the variety. Patience.