I forgot to store the packets of seeds that I purchased last Spring such as pansies, petunias and cosmos in a sealed container or bag. They are still in date? I sowed them indoors nearly three weeks ago with very poor germination rates apart from the Cosmos. Cosmos is a bigger seed. I do think germination conditions were adequate. Is it worth testing these seeds using the paper towel method or are they dead?
If you are doubtful about batches of seed, try a few on damp tissue in a warm place as a test. Live seeds will show signs of sprouting.
Even with low rates of germination it can still be worthwhile to sow.