Foxglove seed - when to harvest

in Plants
I've had three varieties of foxglove in the garden this year, and they're just starting to come to the end of their bloom. I've promised some seed to family and wanted to ask whether it was OK to remove the green seed pod and place in a jar, instead of waiting for them to dry out and turn brown?
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I can't vouch for other specific colours/varieties though.
I'm afraid I dislike a lot of colours that other people really like - blue and peach for example, and pastel colours, especially pink.
I pull those out from the roots before they drop seed.
There’s always a fresh lot of babies ready to be planted in their place in my choice of colours, I did find the Dalmatian variety lasted true for a couple of years.