A combination of dried flowers and quality artificial plastic - that's what really saves the day when you're dealing with allergies and budget constraints. Dried flowers (pampas grass, baby's breath, eucalyptus) barely shed, cost next to nothing compared to fresh ones, and they look super aesthetic in photos - even better than fresh flowers, actually, because they don't droop by the end of the day. Throw in a few branches of premium-quality artificial flowers, and no one will notice the difference either in photos or in person.
I get that artificial materials in 2026 are a whole different thing from what they used to be. But I wouldn't rely solely on plastic for the whole arrangement: if a guest happens to touch the bouquet or get a close-up look, it could be awkward. But when half the arrangement is textured natural materials (dried flowers, branches, leaves), it looks way more expensive and realistic. Plus, guests psychologically perceive that kind of bouquet as the real deal.
One more thing - the minimalist approach from the previous answer is totally valid, but if you want beautiful photos with flowers, dried flowers are genuinely your best bet. They really don't require complicated care and look fresh even hours after the celebration starts.