As well as biodegradable wedding confetti, many brides (and grooms) are choosing local seasonal flowers, if they choose to carry a bouquet. Grow Your Own Wedding Flowers is a lovely book, by an organic flower farmer.
If pets are nearby, many flowers (including lilies) are toxic to pets, as are wildflower plantable cards/favours (and trees like yew/oak are toxic to horses). Learn more on toxic plants to avoid near pets. For indoor displays, never face foliage to face gardens, to help stop birds flying into windows.
Blooming Green Flowers (Kent) lets you wander through their acre of blooms, to pick your own wedding flowers.
Common Farm Flowers (Somerset) proves they’re local, as you can’t buy them in winter. For summer weddings only! Georgie is author of the book on how to grow your own wedding flowers, which includes ideas for each season and growing flowers for buttonholes.
where to recycle your wedding bouquets
If only using flowers once (like weddings), you can donate them to charities like Floral Angels that use volunteers to regift them to those who need cheering up.