Plugs can be stored for 6 weeks in the dark (6 weeks in light) at 41F and subsequently grown into very acceptable plants and/or flowers.
Tidbits:
Named in honor of Mattias del l’Obel (1538-1616), botanist and physician to King James I.
Can survive as a perennial in many states and/or can easily reproduce by seed. Birds often act as seed carriers and therefore plants can arise from almost anywhere.