It seems to me if you have a lot of old seeds 10 years +
1) more seeds trying to revive means better chance with even 1% germination rate and producing a viable individual plant ..etc.
2) optimum heat in growing medium 25 C ??
3) high grow light stimulation (at least 12 hours )
4) patience to wait possibly much longer 30 + days .
(not the normal 7 days for emergence for some fresh seeds)
5) seeds lightly on top of medium kept moist (not soaked)
(I have been known to use 1ply of a 2ply paper towel to keep seeds moist on top of medium)
6) use of potassium nitrate pre treatment or peroxide...could help ..
.
I have always wondered if extreme long term "waking up " success requires a very
gradual process. A slow increase rehydration regime in the special old seeds(over a few days)...
and also a slow temp ramp up to be sensitive to the old seeds...
(2 days @5C , 2 days 10C , 2 days 15 C , 2 days 20 C,
rest of revival attempt at 25C ) Just wondering if a gentle "ramp up " would be
more successful to bring back ...old vintage treasure seeds