Snip, snip!
Under good conditions, they could have stayed in the ground for at least another 7–14 days so that the tubers could become firm.
I didn't want to take any risks, as some of the Medusa flowers ended up in the trash can due to rot, so I decided to harvest the Sweet ZZ earlier as well. Fortunately, it proved to be very resistant to rot, and I was able to hang up the entire harvest to dry.
I can therefore absolutely recommend it for outdoor use, even under very poor conditions or rainy summers.
I did not weigh the flowers when wet.