For my February garden show , I talked about source lifespan or viability on my radio show amongst other topics relative to February .
Here is a seed lifetime chart that I hoard from several chart online : SEED LIFESPAN
This is a general guideline and depends a lot on how the germ were taken care of . I ’ve had seeds germinate that were way past their prime . In fact , my giant green squeeze , ‘ Jabba the Hut ’ localize a new NM State record in 2011 of 340 lbs ! It came from a semen that was over 8 old age one-time , which harmonise to this chart , the life-time should have been between 4 - 6 years old but it was the only seeded player I had . In fact some seminal fluid have been evolve from tomb in Egypt century ago . So if you have a special seminal fluid , strain it despite what the chart may say .

Below is a chart for optimum seminal fluid sprouting temperatures if you are growing from seed inside . It is very important you essay to bourgeon seed at their optimal temperature - too cold a temperature then the seed might not germinate or even rot and too hot of temperature , the seminal fluid may fry . This chart is also good as to what temporary worker the soil should be if you manoeuver seed out of doors .
( Zone 6a):SEED GERMINATION CHART
This is an important topic this time of twelvemonth as many of us are decide whether our seminal fluid are too one-time to develop or still good and if we necessitate to replace them . Here is some of the information I give on the radio receiver show :

‘ Every seed has a shelf life . you could search how prospicient seeds can be stored and how to test their viability . Fresh seeds are substantive for good sprouting . Old seed have less achiever of germinating .
To prove them , take 10 seed and soak them in pee overnight and then put them in a damp paper towel and put them in a Ziploc bag and on a warm windowsill or on top of your refrigerator ( but not a sunny place , you do n’t want to electrocute the seeds ) . Then in a few day see them to see how many have germinated . ’ If all 10 seeds germinate , then you have 100 % sprouting , 5 seeded player would be 50 % and 2 cum would be 20 % and so on . I will normally get disembarrass of any vegetable ejaculate 30 % or less .
In the case for old flower seeds , I just drop out the come in saltation and see what pops up . This is from last year ’s garden - fantastic but of course we had a very rainy summer so that helped !

Look on the package to see the class the seed company sold them . I have noticed that some seed companies do not put the date on the package , in which case I write down the year I bought them on the package .
go for this help when making decisions about which seed to pull through and optimal seed germination temperature when start them .