Tomato seeds can stay viable for many years. Just reseal the packet, place in a ziplock sandwich bag and store in the refrigerator crisper. I have had good germination on tomato seeds that were 10+ years old. As you can see, it is also useful to keep track of the number of remaining seeds in the packets from season to season. Without reopening the packet you will have the information at hand to know when to reorder seeds.
Hybrid lilies (genus Lilium) are sorted into eight divisions that are based on their genetic background. The most common and readily available lilies for the garden are from Division I, Asiatic hybrids; Division VI, Trumpet hybrids; Division VII, Oriental hybrids; and Division VIII, Interspecific or hybrids that don't fit into any of the other seven divisions.
The cultivation of Iris ensata was first noted in literature more than five hundred years ago in Japan. Native to eastern China, Siberia, Korea, and throughout Japan, they are found growing in damp areas near streams, ponds, lakes, and marshes. The selective breeding of the species that commenced in the 1800s produced the foundation of the modern Japanese iris. Colors and color patterns have been greatly enhanced over the years.