The first is take off and nuke the place from orbit.
Or dig out all the bulbs, clean carefully, apply herbicide, pray a lot, cover with ground cloth, pray a lot, cover with mulch, pray a lot, wait one year, pray a lot, replant bulbs. Oh yes, and pray a lot.
Since Hubby is being unreasonable and refusing to let me have a nuke we are going with option number two.
Best wishes! I don’t think our HOA allows nukes, so I’d have to do the same.