Flowers!!

If you look online you can get some pink sunflower variations and find lots of sunflower bouquets with similar flowers like pink gerberas, roses or other pink accents to complement - you could keep your sunflower theme, but bring in some subtle pink accents to complement your dress? You might find that you like having fewer sunflowers as highlights in mixed arrangements so they stand out? Do not scrap an idea you love, enjoy having a look at how others have brought in different colours and used sunflowers and see if that feels right - also, your dress is beautiful and if you just had a sunflower bouquet it would be absolutely fine - do what feels right for you! x

I think find a florist first that works with your idea and doesn't just offer up what they are comfortable doing/used to.

I had a clear idea of what I wanted and once I spoke to a couple of florists and and got some moodboards back it was clear who understood what I wanted. As Sarah says there are loads of sunflower options out there in pinks and reds and different colours.

It sounds like a lovely idea and its a gorgeous dress so I'm sure you'll find a florist who gets it!

You can get sunflowers in pinkish/reddish tones, so perhaps you could have those for your bouquet and then have the more traditional yellow sunflowers on your reception tables? There are loads of different varieties and you can also get seeds for many of them, so you could even have favours that match the sunflowers in your bouquet!