All I do is take a good one by eye and more important taste. Squeeze
some seeds on to a paper towel and and let them air dry. Later on clean
them up a little, label and store. The do is becoming did as my sun
light is not great at my house. I gardened over my dad's next door for
over 50 years . But things change.

Bill whose sunlight is increasing sadly due to some Oak rust disease.

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Garden in shade zone 5 S Jersey USA

Not all who wander are lost.
- J.R.R. Tolkien (1892-1973)