I just bought a calamondin and it has about 10 fruit on it! They have a good amount of seeds in them and I want to plant a few for grafting. All I need to know is how to prep the seeds before planting and what type of condition they need to be in to thrive. thanks.
Not much to it really. Wash off the seeds and pot them up right away -- maybe a half inch down in good potting mix and keep it in a warm sunny spot. Likely each one will germinate, so pot each in it's own small pot.
Generally you should not let them dry out. But they may still be good if they haven't remained dry for very long. I think one or two days is probably OK. Usually they can be stored with a damp paper towel in a ziplock in the fridge for longer periods.