Well that sucks!! Sure was looking forwards to the progress.
Never had a bad pack of seeds..
Are you sure mice didn't dig them up??
I had that problem this year. First time ever with both pumpkin and sunflower seeds.
I only have 4 outta 9 that made it.
Edited too add...
Guessing it's to late to get a great plant going but perhaps try this.
Put 2 seeds 3 inches apart, make sure the soil is real wet, cover them up with a clear ice cream bucket.
Once they pop out of the soil, take the bucket off andget them caged.
Just a thought.
Even if they make it only 6_8 feet tall, the bucks will still hammer them but most likely push them over.