The zygospore thus formed germinates after a long period and forms a new filament of cells.

The Pink, for instance, may be sown at any time, Sweet William thrives best if sown in March or April, the variegated and light colored Larkspurs should not be put in until December, the Dahlia germinates most successfully in the rains, and the beautiful class of Zinnias are never seen to perfection unless sown in June.