Disclose substitution
Before the order, not after.
Because a photograph is a record of one week's market, and yours is a different week.
Flowers are an agricultural product with a market that moves weekly. A named variety in a photograph may be unavailable, poor quality or four times the price on the day an order is made, which is why every florist substitutes — and why the honest ones tell customers that at the point of ordering rather than in an apology afterwards.
Delivery deserves the same candour. A fixed time cannot be promised through Florida weather, traffic and gated communities, so a window is the truthful offer. For a funeral we build backwards from the service time and deliver early, because that is the one occasion where late cannot be fixed.
And there is one safety point worth raising unprompted: lilies are toxic to cats, and they appear in a great many standard arrangements. Flagging them, and substituting on request, costs nothing and occasionally prevents something awful.
Before the order, not after.
An exact time is not deliverable.
They are toxic to cats.