WHEN I first wrote about saffron in this column, the bulbs (strictly speaking they’re corms) weren’t so easy to get hold of. These days you can find them readily online. Since that was really the only obstacle to growing this fabled spice, I hope I can persuade more of you to have a go.Saffron (Crocus sativus) doesn’t take up much garden space and doesn’t need special equipment, skills or conditions. There’s not much work involved at any stage, you get beautiful flowers in the autumn and you end up with a crop which to buy can be more expensive by weight than gold.