Where we get our data.

Garden Capital pulls directly from each garden or organization's public calendar, updated weekly. Nothing is editorialized or paid for. The list below links to each source's own site.

Active sources

• Ambler Arboretum of Temple University Ambler, PA
• Awbury Arboretum Germantown, Philadelphia
• Bartram's Garden Southwest Philadelphia
• The Barnes Foundation Philadelphia
• Bowman's Hill Wildflower Preserve New Hope, PA
• Chanticleer Wayne, PA
• Friends of the Wissahickon Chestnut Hill, Philadelphia
• Garden Conservancy Open Days Private gardens, PA/NJ/DE region
• Glen Foerd Philadelphia
• Grid Magazine Citywide sustainability calendar
• Hagley Museum and Library Wilmington, DE
• Jenkins Arboretum & Gardens Devon, PA
• Longwood Gardens Kennett Square, PA
• Morris Arboretum & Gardens Chestnut Hill, Philadelphia
• Mt. Cuba Center Hockessin, DE
• Pennsylvania Horticultural Society Philadelphia (multiple locations)
• Philadelphia Orchard Project Community orchards, Philadelphia
• Schuylkill Center for Environmental Education Roxborough, Philadelphia
• Scott Arboretum of Swarthmore College Swarthmore, PA
• Tyler Arboretum Media, PA
• Welkinweir (Green Valleys Watershed Assoc.) Pottstown, PA
• Winterthur Museum, Garden & Library Winterthur, DE

Private gardens

Private gardens — those opened by their owners on select dates — don't publish machine-readable calendars, so we track them differently.

Two automated sources cover most regional open days: Garden Conservancy Open Days (in the list above) and the Hardy Plant Society of the Mid-Atlantic pop-up event series. Both are scraped weekly.

Beyond that, we run a weekly search across 15 named private gardens in the region — including Hedgeleigh Spring, Federal Twist, Donald Pell Gardens, Brandywine Cottage, and Hortulus Farm — checking their own websites and looking for newly announced open days. Confirmed events are added to the calendar by hand before each Sunday's newsletter.

Know about a private garden that should be on our watchlist? Submit it below.

Add an event or source

Know about an event we missed, or a garden we should be tracking? Use this form.