I'm on the east coast, but here's a general rule of thumb from my reading: Agave "ususally" have a spike on the tips of their leaves and often...
I sprouted this August around 15 seedlings of mixed cacti from a seed packet from 2007. So I would go ahead and try. As to aged seeds, I have...
As to having a Passionflower vine, I believe if you are in USA zone 6 (or lower) only Passiflora incarnata is hardy. The top will always die, but...
If you freeze or stratify the seeds, would you nick them before, or after freeze/stratify or not at all? And would you soak them? Opuntias...