Well, actually I have grown over 50 of the strains in my seed collection, so that shaves the years down to 13 or so more years growing 6 strains a year. I can increase the strain count per year, as my brother can also grow 4 strains a year. So it could be done in 8 years, if I lay off doing more trades (Wow! 130 strains. Grow 6 strains each year...... you’ll be finished in 21 years. I’ve really enjoyed reading this thread. Great job on keeping your seeds stored. I recently revived 30 year old seeds and achieved better than 60% germination rate. Kept my seeds in the fridge though instead of the freezer. Again, great read BigSur. Salute!