My bulbs were of decent size (about 2cm dia) when I planted them last October. There was a good flush of "grass" that dried up eventually. When I dug up the bulbs, I find they've all given birth to multiple tiny bulbs, but the original bulb never grew in size. What mistake am I making?
I have a playlist on growing saffron where I discuss the same issues that you a re seeing - check out the video titled "Saffron's dirty little secret". I am still experimenting so will update as I go! Thanks for your question and comment!