Hi there!
I've read and see many things about how to save squash's seeds in general.
But for Butternut I have seen one time that person saying that once they were washed, you should let them soak in water for about a day, and the one that will sink in the bottom are the one you can plant, the others you can discard. Then I never saw any other person talked about this, is that true ?

Is there a "general" rule for squash of all sorts ? Because it seems "too easy" to think that you can always save ALL seeds from a squash ?

Thanks a lot

Here is a bit about seed soaking and squash in general (I love growing them ):

-The principle behind the soaking method is that viable, mature seeds are denser and will sink, while non-viable or immature seeds will float.
-After scooping out the seeds, washing them to remove the stringy pulp, and letting them soak, discard the floaters and keep the ones that sink to the bottom.
-However, not every seed-saving gardener employs this method, and many find success without it.

General Seed Saving for Squash

-When saving seeds from any squash, ensure you're selecting seeds from ripe, mature fruit.
-After removing seeds from the squash, rinse them well to remove any attached pulp.
-Spread the seeds out on a paper towel or a screen to dry. They should be in a well-ventilated area, and it's good to turn them occasionally for even drying.
-Once thoroughly dried, store them in a cool, dry place. An envelope or a glass jar works well. Remember to label with the squash type and the date.

I never wash... Just collect seed and dry in a cardboard box... Eventually store dried seed in paper bag or other paper envelope, or if refrigerating, another container may be used with less concern about seeds going bad.

Hi to both of you and thanks for your answers! Yes I was was wondering what would make the washing mandatory ? Is there a risk of rot/mold if they stay dry in the pulp for a few months ? thanks

you can store gourds that way... seed remains inside gourd until planting in spring...

i separate the squash seed from the pulp... just avoid washing.

not sure what you are asking.