Very few early-flowering bulbous, tuberous and cormous plants are as extensively planted as the Crocus. Indispensable for each and every garden, they join snowdrops, winter aconites and glory-of-the-snow as the very first heralds of spring. The bright yellow ones, so often seen, bring the first bit of ’warmth’ to the new year. More than 100 species are known, but only thirty have been cultivated. The most popular crocuses are the ones that no longer closely resemble their wild ancestors.