I have Marigold seeds still in the package from 2008. Will they grow if I plant them now in 2024? Do seeds expire?

Some seeds expire. The only way to know is to plant them.

Another way to check, if you have enough to spare, is to dampen a couple of layers of paper towels then set 10 seeds on them, covered by another damp paper towel. Set it on a counter away from direct light for up to the germination time shown on the seed packet, keeping them consistently damp with a spray bottle. You might be able to see if they are sprouting through the top layer, or lift it carefully every few days to check. The number (out of ten) that sprout will give you the seeds' germination rate (percentage).

Welcome to NGA, @wrshpr4lf .

One thing we can say for sure is that they won't grow unless you plant them!

NMoasis said: Another way to check, if you have enough to spare, is to dampen a couple of layers of paper towels then set 10 seeds on them, covered by another damp paper towel. Set it on a counter away from direct light for up to the germination time shown on the seed packet, keeping them consistently damp with a spray bottle. You might be able to see if they are sprouting through the top layer, or lift it carefully every few days to check. The number (out of ten) that sprout will give you the seeds' germination rate (percentage).

I do this also but put the paper towels in a plastic ziplock bag. Its easier to keep them damp.

I also put them in a plastic ziploc bag, don't have to do anything to them after that except watch for signs of sprouting.

I think the important question is how the seeds were stored.

I've had trouble with these seed when stored for longer than the next season... But... that is when I've had them at room temperature... at my house, room temperature tends to be whatever temp it is outside...

I've had better luck with seed that I've kept in a dedicated fridge... I have a college dorm fridge that is strictly used for seed.

Your seed? I think I'd wait for spring and scatter across a seed bed... and see if anything grew...

Personally... I wouldn't get my hopes up.

But don't wait any longer than this spring to plant them!

Plant them where you would like them, may fatum be with you.

Just toss them where you could care less, POOF, they grow like wild fire.

I have had Cracker Jack marigold seeds for over 10 years (stored in refrigerator at 37F) They are still viable, estimated 80% germination rate. As noted by many, check the viability and germination of your seeds by soaking them in water. Plant the seeds that sprout in water to save some outside growing time. Works for most seeds.