The van is at the passerelle with eleven wrapped bunches and the deck team wants the crate moved before the guests arrive. You have ninety minutes. What you do with those stems in the next twenty of them determines whether the arrangements survive the charter.
Why Conditioning Works
A cut stem draws water up a column of xylem vessels. Two things break that column: air embolism (an air bubble drawn into the cut end) and bacteria (which multiply in dirty water and block the vessels). Conditioning removes both and rehydrates a stem that has been out of water since it was harvested.
The Standard Procedure
- Prepare the bucket first. Scrub it clean, fill with fresh cool water, add flower food at the dose on the sachet. Flower food is sugar (energy), an acidifier (aids uptake) and a biocide (controls bacteria) — all three matter.
- Unwrap and separate. Take off plastic sleeves and rubber bands; compressed stems bruise and rot.
- Cut the stems, ideally under water or straight into water, taking 2 to 5 cm off at a slant to expose more surface and stop the stem sitting flat on the bucket base.
- Use a sharp knife or floristry snips, never household scissors, which crush the vessels.
- Strip all foliage below the waterline. Submerged leaves rot within hours and turn the water bacterial.
- Deep drink: stand the stems in water up to two thirds of their length, in a cool, dark, still place for at least 2 to 4 hours, overnight if you can. A cool lazarette or a shaded pantry works; do not store them with fruit.
Conditioning by Stem Type
| Stem type | Examples | Treatment |
|---|---|---|
| Woody | Rose, hydrangea, lilac, viburnum | Slant cut, long deep drink; hydrangea can be submerged head-first for 20 minutes |
| Soft / hollow | Delphinium, amaryllis, lupin | Fill hollow stem with water, plug with cotton wool; support with a cane |
| Bulb | Tulip, hyacinth, daffodil | Cut only the green part; cool shallow water; tulips keep growing and bending |
| Latex / sap-bleeding | Euphorbia, poppy | Sear the cut end for a few seconds in boiling water or with a flame |
| Grey / soft-leaved | Stachys, dusty miller | Water only to the stem, keep foliage dry |
The Daffodil Rule
Cut daffodils and narcissi release a sap that is toxic to other flowers and shortens their life badly. Condition them alone for at least 6 hours, do not re-cut them afterwards, and only then mix them. Tulips are the classic casualty.
Onboard Notes
- Rushed conditioning is false economy: an hour saved on arrival costs you three days of vase life on charter.
- Change the conditioning water if it clouds, and never top up a dirty bucket — empty, scrub, refill.
- Label buckets with the arrival date. On a long charter you will lose track of what came aboard when.