Here's a partial list of major plant sale and garden-themed events across the U.S. for September

 

If you're thinking about travel plans for September focused on gardening, check these out. I'm sure you'll be delighted.

Major Plant-Sale & Travel-Worthy Garden Events — September 2025 (U.S.)

• Swan Island Dahlias: Annual Dahlia Festival (Canby, Oregon)
  Through Sept 14
  Acres of dahlias in full bloom, guided tours, workshops, and one of the biggest cut-flower and tuber sales in the country. A pilgrimage for dahlia lovers.

• Fall Plant Sale — Thomas Jefferson Center for Historic Plants (Monticello/Tufton Farm, Virginia)
  Sept 13
  Rare heirloom vegetables, herbs, and ornamentals connected with Jefferson’s own garden legacy. Perfect for gardeners with a taste for history.

• Philadelphia Horticultural Society (PHS) Fall Plant Swaps & Distribution (Philadelphia, Pennsylvania)
  Sept 8–9 & Sept 20
  A chance to swap with fellow gardeners, plus Challenge Plant distributions—great for expanding collections with unusual varieties.

• Chicago Botanic Garden — Fall Plant Giveaway (Glencoe, Illinois)
  Through Sept 28
  Known for their large-scale seasonal events, including free plant giveaways and special horticultural programs.

• New England Fall Flower Show (Wellesley, Massachusetts)
  Sept 20–21
  Historic 139th show with exhibits, plant vendors, and regional nurseries offering unusual finds.

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