Tardiva has a baby ~ when safe to ...
... dig up & pot? Discovered surely, on Memorial Day! Babe is too close to Lavender & Platycodon under plants ~ will need to ween soon or have a problem.
Need to save babe for sentimental reasons - Tardiva was planted in memoriam for a BIL who just had his 1st grandchild this year!
I've never had one spontaineouly spring up on me. I've rooted by layering (split-pot & direct-ground rooting) & stem cutting w/ root tone.