Again, the internet has plenty of information on the subject. Iowa State University has an interesting page with a smaller table (and a few discrepancies between the two). Daphne also has a wonderful post about her precious seeds. And check out Thomas' survival kit if you missed it.
|Relative Longevity of Well-Stored Vegetable Seed|
|Corn salad (mache)||Brussels Sprouts||Beans||Leek||Parsley|
|Pumpkin||New Zealand Spinach|
* Note : The original information had spinach listed at 1 year. I changed it to 5 based on the info at ISU, as well as the info on this page. However, Daphne's comment compelled me to search further and the information is contradictory to say the least. While sources generally agree on most vegetables, spinach is definitely the odd one out getting either a 1 or a 5 on different sites. Shall we compromise on an average of 3 ? Considering what Mike says about it on this TFB post, it should be good for at least that. (See Mike's reply to Anne).
Ideal storage conditions
"The ideal storage condition for seeds is somewhere cool and dry. For many homeowners a capped jar in the refrigerator serves the purpose. Just looking at the seed will often give an indication of seed quality. For seeds that are usually smooth and round or plump, they will not germinate well if they are pocked or wrinkled. Peas, corn, and many other seeds are normally wrinkled but may not look as good as they should".
Geri Guidetti (The Ark Institute) also adds
"To sum up storage of seed, cool, dark and dry are the conditions you want. Temperature fluctuations, especially heat, and humidity are seeds' worst enemies. Generally the drier and cooler the better. You are shooting for a moisture content of about 8%. Seed that dry can be safely frozen for very long periods of time with little or no loss of seed viability. I have spoken with seed storage experts at the National Seed Storage Laboratory and was told that seed stored forty years ago under these conditions was highly viable". >> more
Proper storage measures will be taken for my seeds this year, especially those with a shorter shelf life. :)