4. Add accent buds low. Tuck tiny buds like delphinium near the tape line where you can still reach them. This gives you color depth without bulk at the top.
5. Wrap the stem. Once you're happy with the arrangement, wrap the stem firmly with stem tape from just below the bloom cluster down. It doesn't have to be perfect because it's going in a sleeve.
6. Trim and slide into the sleeve. Cut the stem shorter, but not so short it'll topple out. You want enough stem to anchor it in the sleeve. Slide the boutonniere down into the rigid plastic sleeve. You can backfill with extra leaves or small buds directly into the sleeve after it's in.
7. Store in a hydration chamber. Lay a damp paper towel in a sealed Tupperware container. Place the pocket square (sleeve and all) on top, lay another damp paper towel over the flowers, seal the lid, and refrigerate. Pull it out the morning of the wedding.