Choose a period and compare the same brief
The price of one stem is not the cost of a display. Decide whether you are comparing a one-day event, a monthly reception arrangement or another actual period. Then compare a similar visual result in the same space. Fresh and preserved flowers offer different experiences; that difference belongs in the decision too.
Count replacements and the work around them
For fresh flowers, include the arrangements and replacements needed during that period, plus delivery, conditioning, water changes and arranging time. For preserved flowers, include the initial material, any replacements actually needed, delivery and time spent on careful handling and dust removal. No watering does not mean no work at all.
Use your own figures
Total cost = initial purchase + replacements + delivery + care and arranging. Divide that total by the weeks or months of actual use. Use purchasing records and staff time from your business. If you do not yet have those figures, keep the comparison provisional rather than turning an assumed lifespan into a guaranteed saving.
Where preserved flowers may make sense
In a suitable interior where the same display is wanted over time, fewer replacements can spread the initial cost across a longer period. Carefully handled material may also be reused in another composition. The benefit depends on the setting and the work involved; it is not automatic for every hotel, restaurant or event.
An unsuitable position changes the calculation
Direct sun, strong heat, high humidity or frequent rough handling can affect useful life. Check the location before calculating the cost. A temporary project or one that needs fresh-flower characteristics may lead to a different choice. The right comparison starts with the material that suits the job.