Autumn-blooming Crocus
There are a great many Autumn-blooming Crocus, and I'm not entirely conscious of the differences. A good place to start looking them up is Bulbs, by Roger Phillips and Martyn Rix. Unfortunately there's not much descriptive text, but it has a lot of photos and it lists a lot of uncommon and uncultivated species. Like other Phillips and Rix titles, this one inspires wish lists. Watch out for hardiness ratings; not all Crocus are ironclad hardy in really cold climates.
I recently started growing Crocus cartwrightianus, which is believed to be the wild ancestor of Saffron (C. sativa). It looks like the Saffron Crocus except for its smaller size. It's worth the sacrifice of size, though, because C. cartwrightianus is fertile, unlike its triploid domesticated cousin, and therefor less likely to die out. The smaller flowers are sturdier, too, standing up neatly instead of flopping over like Saffron blossoms. The leaves appear as it is blooming, so it's not quite as naked as most of the autumn-blooming Crocus. So far it is already blooming well on small corms, another improvement over C. sativa, which produces sparce bloom this far north.
Crocus cartwrightianus in my rock garden
The saffron from northern Africa (which sometimes shows up in the markets of Mediterranean Europe) isn't the real thing. A little saffron might still be produced in Spain and Greece, but currently the largest producer by far is India. It's probably mostly for export; Indians use it only occasionally. Iranians use it to make some of the fanciest rice dishes I've ever seen. In southern Europe its also used mostly for rice dishes, but Germans have been known to make saffron potatoes, in Cornwall it's added to saffron buns, and in Scandinavia (particularly Sweden) its used for making saffron-flavored sweet breads.
The part you harvest is the stigma. You can use the stigmas of C. cartwrightianus in place of Saffron, as I intend to do. Too bad it only blooms once a year (there's a reason Saffron is expensive!). Grow enough and you can make some saffron buns for Christmas. I'll try to remember to post a recipe.
I have had C. pulchellus for many years. This one blooms before the leaves, but the flowers are good-sized and of an excellent shade oflight near-blue. The stigmas are white, which distinguishes this one from some of its near-relations such as C. speciosus.
C. kotschyanus is better-known among bulb suppliers as C. zonatus. It's reputedly an aggressive spreader, the autumn-blooming counterpart to the spring-blooming C. tommasinianus, a good one for naturalizing but probably not for planting next to demure alpines.
Spring Crocus naturalize well in lawns. I'm not sure about the autumn-blooming CrocusI'm afraid they might get mowed down. You might try them on the very edges of the lawn if you can remember to do your last mowing well before they bloom.
