the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound. 2. Chemistry.
The cultivated saffron (saffron crocus C. sativus) flowers in the autumn and comes up every year, so it is known as a perennial plant. It does not grow wild, and is now a triploid form of the eastern Mediterranean plant called Crocus cartwrightianus. It is thought that C. cartwrightianus came from Crete.he cultivated saffron (saffron crocus C. sativus) flowers in the autumn and comes up every year, so it is known as a perennial plant. It does not grow wild, and is now a triploid form of the eastern Mediterranean plant called Crocus cartwrightianus. It is thought that C. cartwrightianus came from Crete.
Question: Every time I plant tulips, they seem to come up only one or two years, then they disappear. Do you have any advice for getting tulips to come back year after year after year, like my daffodils and crocus do? Answer: Hybrid tulips are not strongly perennial in most gardens.his ensures large bulbs that will bloom well one year, but then they typically split themselves into smaller bulbs that can take years to grow back to blooming size. Also, tulips are native to areas such as the Turkish mountains where they receive no rainfall in summer and enjoy excellent drainage.