Don't even think of signing on the dotted line unless all of these items are included in your flower contract.
Name and contact information for you and the vendor
Date, times, and locations of your event
An itemized list of all the flower arrangements you're buying -- with exact names, amounts, and colors
Flower alternatives (in your price range) should a specific bloom be unavailable on the day of your celebration; also include unacceptable substitutions, if any
A list of items the florist will supply -- centerpiece vases, trellises, other accessories
Arrival times for setup at the site
] Name of the florist who will be on hand during the event
Total cost and payment schedule
Sales tax, overtime charges, delivery fees, and setup fees
Deposit amount and due date
Balance amount and due date
Cancellation/refund policy
Florist's signature
Your signature