As far as your planned plantings, though, I would recommend concentrating on annuals for the best yield of cut flowers in September. Most annuals, because their entire life cycle takes place in a single season and they don’t need to reserve energy for future years, bloom heavily throughout the season. If you plant a selection of annual flowers that lend themselves to cutting you should have a good harvest for bouquets on the day of the wedding. You asked which flowers would hold up in vases for several days, but I highly recommend cutting the flowers no earlier than the day before the event.
The ideal way to grow cutting flowers is in the very utilitarian style of a cutting garden. Planting in rows allows you to maximize your growing space and, as a result, your floral yield. Prepare the soil before planting by adding generous amounts of organic matter. Plant rows of your young plants, which you can start from seed, purchase by the flat, or as individual small plants and top-dress with organic fertilizer. To encourage rapid, healthy growth and heavy bud set I would also recommend applying a soluble fertilizer, formulated for blooming plants, every two to three weeks. We recommend Fox Farm Big Bloom, Fox Farm Tiger Bloom, or Jack’s Blossom Booster.
Although the annuals best suited for the cutting garden are not necessarily our natives, an airy, natural look can still be achieved with these flowers, and I am confident that your guests will be charmed by your beautiful hand-grown wedding flowers.
When selecting annuals for your cutting garden make note of the height and description of the plants. Many newer varieties have been bred for short, compact stature which makes them better suited to container culture and use in smaller gardens. You will want the opposite – tall plants with long, sturdy stems that make them well suited for cutting.
Recommended Annuals for Cutting: