Old seeds, let me tell you something.
Beyond what I wrote above-- this year, I planted seeds from the very same remaining packets I used last year
As wrote above, last year it seemed nearly every kernel germinated and grew. This year ZERO. Now that ain't right.
SO--
I replanted with new seeds.
Out of five packets, two came up the others, zero.
Squirrel are not digging them up, as they are well fed with sunflower seeds and peanuts.
Darndest thing I have ever experienced I went from poor germination one year, to exceptional, to zero, including some brand spanking new seeds.