Where to buy the biggest native plants?

Hey all! I would love to buy native plants - a mix of ferns, grasses, flowers, and shrubs. But I really need them to be matured by September as I'm using them as decor in my wedding. Do you all have any ideas on where to buy some mature native plants?

I would love to specifically buy: Solidago flexicaulis Symphyotrichum shortii Eurybia macrophylla

Aronia melanocarpa Viburnum acerifolium Potentilla cinquefoli

In case you all are concerned about plant safety: I plan to repot them in a large pot now and then after my wedding I will plant them in the ground for fall. Or I will buy them close to my wedding date and plant them in the ground right after my wedding.