Yes, we think so. We've done the tomato seed germination math! Our fresh tomato seeds germinate only around 85% of the time. Older seeds are much worse than that, with perhaps a 50% germination rate for five or six-year-old seeds. (Our fresh cucumber, squash, and sunflower seeds germinate around 95% of the time! So, tomato seeds are slightly trickier to germinate compared to cucumbers, in our experience.)