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Fresh seed does not need to be soaked. After 2 or 3 years seeds will benefit from an 8 -10 hour soak in a mild kelp solution. Soaking longer then that risks drowning the seed. Kelp has natural Gibberellic acid GA3 which is a growth stimulator.
5 plus year old seeds require special treatment. As the seeds age the outer shell becomes denser making it harder for water to penetrate and stimulate the growth. A slight scuff on a piece of super fine sand paper or the striker on a match book will cut into the surface of the shell. The idea is to make sure the seed gets enough water inside before it runs out of energy to grow. A few minutes rinse in H²0² will sanitize the outside of the seed. Then proceed as above.
Old TimingMan on another forum germinated 40 year old seeds using this method:
“ Old TimingMan
I wish there was a easier way but so far my best luck has been scuffing them in a sandpaper tube, letting them set in a H2O2 bath for an hour while plunking them down every 15 minutes, and then using the GA3 at a rate of 500 PPM in distilled water with temps at the 80 degree mark from soak to sprout.”
You can crack old or hard to germinate seeds to aid in the water getting in. They make little tools to do it or you can just crack them in your teeth. I have never cracked any.
5 plus year old seeds require special treatment. As the seeds age the outer shell becomes denser making it harder for water to penetrate and stimulate the growth. A slight scuff on a piece of super fine sand paper or the striker on a match book will cut into the surface of the shell. The idea is to make sure the seed gets enough water inside before it runs out of energy to grow. A few minutes rinse in H²0² will sanitize the outside of the seed. Then proceed as above.
Old TimingMan on another forum germinated 40 year old seeds using this method:
“ Old TimingMan
I wish there was a easier way but so far my best luck has been scuffing them in a sandpaper tube, letting them set in a H2O2 bath for an hour while plunking them down every 15 minutes, and then using the GA3 at a rate of 500 PPM in distilled water with temps at the 80 degree mark from soak to sprout.”
You can crack old or hard to germinate seeds to aid in the water getting in. They make little tools to do it or you can just crack them in your teeth. I have never cracked any.