Botanic Garden and Natural Lands

America’s oldest preserved botanic garden is still growing.

​The 50 acres of Bartram’s Garden change every day and in each season.

A variety of ecosystems thrive within this landscape, representing a range of historic, botanic, and cultural forces. Our landscape is based on natural ecosystems, the Bartram family’s letters and books, archaeological and geological evidence of how the land and river have changed and been used for millennia, and knowledge gained from Indigenous First Nations of North America.

Learn from the Botanic Garden

Bloom Calendar

See what’s blooming now.

Tree Map

Find your favorite tree.

Bird Sightings

Look up! What birds have you seen?

Botanic Garden

The 14-acre Botanic Garden is a collection of plant species collected, grown, and studied by the Bartram family from 1728−1850. The Bartrams focused on native plants of eastern North America, although a wide range of imported exotic plants were also under cultivation in each generation. They made great efforts to observe and record details of relationships within the plants’ original habitats, sometimes but not always noting ethnobotanical relationships.

The layout and plant collections draw from historical records of the garden from the 1700s and 1800s, which are studied and interpreted in the spirit of the Bartram family by our gardeners. The gardens closer to the historic buildings, sometimes referred to as the Upper Garden, represent more formal display gardens, while the Lower Garden, or Wilderness Garden, reflects the plant and animal communities of the North American wilderness.

History of the Botanic Garden

In the 1700s, John Bartram and his son William made many plant-collecting journeys, some north almost to Canada, others as far south as the Gulf Coast, and others as far west as the Mississippi River. They returned to Philadelphia with specimens of native North American plants that were unfamiliar to them and undescribed by European botany, including magnolias, rhododendrons and azaleas, and carnivorous plants.

As Bartram’s fame as a botanist grew, he established one of the earliest commercial enterprises to sell North American plants as individuals or fragments, shipping seeds and plant specimens to clients and collectors in Britain. By the 1750s, Bartram hand-copied early seed and plants lists to share with selected correspondents and print in circulars. In return, Bartram’s friends and peers occasionally brought him new plants as gifts. Many plants in today’s Botanic Garden would have once been included in these different exchanges. The Bartram family’s one-page catalogue, printed in 1783, is one of the first botanic lists of North American plants.

John Bartram’s granddaughter Ann and her husband, Colonel Robert Carr, continued tending Bartram’s Garden and established new formal exhibition gardens to the west of the Historic Bartram House. As plant exchange continued to grow and thrive, the Carrs considerably enlarged the Garden’s commercial nursery, which at its peak featured ten greenhouses, a collection of over 1400 native plant species, and as many as 1000 species of exotics, many under glass.

The country’s first nationally landmarked landscape and America’s oldest surviving botanic garden, the Botanic Garden and the Historic Bartram House were dedicated as a National Historic Landmark in 1963.

Learn more about our Shared Histories.

Ann Bartram Carr Garden

A fragrant pleasure garden for all seasons.

Harvey Memorial Garden

Commemorating the known and unknown Black lives, legacies, and contributions to this land.

Upper Garden

Gardens for healing, household uses, and study.

Lower Garden

Wilderness-style gardens leading to the river.

Natural Lands

Stretching throughout the Garden’s 50 acres, the Natural Lands — including the Meadow, Tidal Wetlands, and woodlands along the river’s living shoreline — draw upon both ancient and contemporary techniques for growing in harmony within the natural world. These spaces provide important year-round resources for a range of native and migrating species, including humans.

Meadow

Reclaimed natural land with a view of Center City.

Boardwalk

A living shoreline on the Tidal Schuylkill River.

Cider Mill Slope

Wildflowers and birding along the river.

Notable Trees

Within the Garden’s hundreds of trees, several have particular historical and cultural significance.

Franklinia or Franklin Tree

Franklinia alatamaha

The Garden’s signature tree was observed by John and William Bartram in 1765 in a small grove along the Altamaha River in what is now known as southern Georgia, on the land of the Muscogee Nation. In 1777, William Bartram transported seeds back to Philadelphia for cultivation and named the plant Franklinia in honor of his father’s close friend Benjamin Franklin. The plant has not been found in the wild since the early 19th century, but continued cultivation by the Bartrams and by many other nurseries has kept the Franklinia in the landscape. All current Franklinia are descended from those originally grown by the Bartrams, including numerous specimens within Bartram’s Garden and those for sale in our nursery.

A member of the tea family, the Franklinia is notable for its large, fragrant white flowers in late summer. The plant’s deciduous leaves often begin turning vibrant shades of red and orange even while the Franklinia is blooming, making for a striking contrast. 

Learn more about the history of the Franklinia.

Ginkgo

Ginkgo biloba

This male tree is believed to be North America’s oldest living ginkgo, or maidenhair, tree. It was one of three original ginkgo trees sent to the U.S. from London in 1785 by William Hamilton of The Woodlands in West Philadelphia. Hamilton gave one ginkgo tree to William Bartram and planted two in the landscape garden at The Woodlands. The trees at the Woodlands were cut down in the 1980s, but the tree at Bartram’s Garden continues to thrive.

Yellowwood

Cladrastis kentukia

One of the Garden’s oldest trees is the Yellowwood, which has reigned over the Kitchen Garden for more than 200 years. The species was observed in central Tennessee by the French plant explorer Andre Michaux in 1796, who sent this specimen to William Bartram in the early 1800s. The historic tree was badly damaged during a wind storm in 2010, but it is recovering well and continues to grow and bloom, and another beautiful Yellowwood is located near the Ginkgo. Look for the Yellowwood’s long tendrils of tiny, white, sweet-smelling blossoms in late spring.

Pawpaw Grove

Asimina triloba

Bartram’s Garden is home to two colonies of pawpaws (Asimina triloba), an ancient, native North American fruit tree found in the dappled shade near taller trees across most of the eastern half of the United States. Over time, these trees have formed colonies by sending out suckering roots genetically identical to the parent tree.

Look for the thin, droopy branches and teardrop-shaped, tropical-looking leaves, which shroud the large, fragile fruit — in fact, pawpaws are North America’s largest edible fruit, with a sweet, funky taste. Between March and May, just as the trees begin to leaf out, the pawpaw’s maroon, bell-shaped flower will emerge. Each flower is capable of producing several fruits, but they’ll need to be pollinated first. In order to set fruit, pawpaws need to be cross-pollinated by a genetically different tree or colony, which is why we have two colonies.

Not only do they provide fruit, but pawpaws are also a host plant for the zebra swallowtail caterpillar. These caterpillars like to munch solely on pawpaw leaves, which results in the caterpillars tasting very unpleasant for hungry birds.

Bald Cypress

Taxodium distichum

This large deciduous conifer is common in wet or swampy areas. You can find several in the Wilderness Garden and as you walk towards the riverfront on the Boardwalk, including some by the Boardwalk with the species’ distinctive “knees” poking out of the soil.

In 1792, while sending planting instructions to George Washington to accompany a nursery order for Mount Vernon, William Bartram described the bald cypress as a tree of “stature majestic, foliage most delicate, wood of a fine yellow colour, odoriferous & incorruptible.”

Most notable in the Wilderness Garden is a Bald Cypress that is no longer present on site, though another was planted in its place. The earlier bald cypress was said to have been grown from a small sapling first planted by John Bartram, eventually reaching 150 feet tall and seven feet in diameter. It was felled by a storm in 1920.

Bartram Oak

Quercus x heterophylla

John Bartram first observed specimens of the Bartram oak, a rare but naturally occurring hybrid of red and willow oak, on William Hamilton’s nearby estate, The Woodlands, located upriver in West Philadelphia.

Sankofa Community Farm Orchard

The Sankofa Community Farm at Bartram’s Garden hosts Philadelphia’s most diverse orchard in partnership with the Philadelphia Orchard Project. More than 130 trees grow everything from almonds to persimmons to figs.

Please respect the hard work of our farmers and youth interns and do not pick or forage without permission.

Little Warren Grove

Little Warren Grove is a collection of circular raised bed gardens hosting a range of plants native to North American bogs, including carnivorous plants and their allies. Located adjacent to the park’s main driveway, Little Warren Grove was established in 2026 thanks to a generous donation of plants and wisdom from Jason Austen and Bill Smith of Warren Grove, New Jersey.

This garden also connects us to early botanic research done by the Bartram family beginning in the 1730s as well as historic and ongoing ecological restoration and land management leadership by the Waccamaw Siouan people.

The garden is designed to mimic the conditions of a natural bog: a cistern collects rainwater from the nearby building, which is then piped underground to each bed’s peaty soil.

What's a bog?

A bog is an acidic wetland dominated by sphagnum mosses and shrub heaths, characterized by the accumulation and slow decay of plant materials over thousands of years, and with rain or snow as its only water source. The water constantly runs through the decaying plant matter, carrying away nutrients such as nitrogen, phosphorous, and potassium—all of which most plants need to be healthy. As a result, bogs are very wet, nutrient-poor, acidic environments.

Though many plants would not survive in these conditions, carnivorous plants like Venus flytrap and pitcher plants are specially adapted to bog ecosystems: since the peaty soil in which they grow is so low in minerals, carnivorous plants instead get their nutrients from the insects they attract and ingest.

Both bogs and their inhabitants are very rare: many plants and animals that live in bogs are so specialized to these harsh conditions that they can’t exist anywhere else in the world!

Many plants that grow in bogs are adapted to grow in clearings after fires. In many of their native habitats, fires occur naturally from lightning strikes; for thousands of years, controlled burns have also been managed by Indigenous communities. Such fires increase the biodiversity of plant and animal life; they remain beneficial in places that have legalized the safe use of fire for landscape management.

Unfortunately, like wetlands in general, many bogs have been harmed by human behavior. For generations, humans have relied on bog ecosystems as sources for harvesting peat for fuel and horticulture (it’s a common ingredient in potting soil!). People have also intentionally filled in, ditched, or drained bogs in order to build or farm on the land. As a result, naturally occurring bogs are being emptied, drained, and filled with other soils more quickly than nature can rebuild them, making these astonishing ecosystems—and the plants that can grow nowhere else—fragile and vulnerable.

Cultivation History

The name Little Warren Grove draws on both the history of this landscape as well as the history of this specific plant collection.

We are forever grateful to Jason Austen and Bill Smith for their generous donation of an entire garden of carnivorous plants and their allies to Bartram’s Garden. They did not only share plants but also offered a wealth of knowledge with staff horticulturists about how to cultivate these delightful specimens. Bill and Jason originally cared for these plants at Bill’s home garden in Warren Grove, New Jersey: located in the Pine Barrens, where pitcher plants and sundews grow naturally.

These cultivation efforts link us to many gardeners, known and unknown, who came before us in caring for these plants.

During the Bartram family’s study of botany on this site in the 1700s and early 1800s, they were very interested in collecting plants from boggy places. They were very early amongst the colonists to collect pitcher plants, Venus flytraps, and sundews. They brought them back to their garden here in Philadelphia from places like the Carolinas and the New Jersey Pine Barrens, learned how to grow them, and introduced them into the international horticultural trade. 

In a 1763 letter, John Bartram describes an artificial bog, similar to this one, that he created to grow the same kinds of plants on this same property:

“my great carolina saracena is in full bloom & my wife took one to town yesterday which was much admired it is a glorious, odd flower A goldish color & striped”

 In 1764, he writes,

“the Saracena Grows wonderfully in an Artificial bog but most unfortunately a Black Snail Eat of the flower bud before it was discovere’d but the Leaves are great Rarities for their wonderful Structures & much admired”

He also laments his struggles to cultivate the Venus flytrap:

“. . . very difficult to raise to keep mine that I thought intirely killed last winter is revived but is so small & weak as hardly to [be] sensible of being tickled”

In addition to the Pine Barrens of New Jersey, various species of pitcher plants occur throughout the eastern United States in bogs. The Venus flytrap, however, is native only to the territory of the Waccamaw Siouan people in what is now known as North and South Carolina. The Tribe is still connected with the plants today, recently organizing STEM programs to revisit the Green Swamp where their ancestors introduced William Bartram to the plants of the area.

In 1791, William Bartram prefaced his book Travels with what can best be described as a love letter to Venus flytrap (Dionea muscipula):

“But admirable are the properties of the extraordinary Dionaea muscipula! A great extent on each side of that Turpentine rivulet is occupied by those sportive vegetables—let us advance to the spot in which nature has seated them. Astonishing production! See the incarnate lobes expanding, how gay and sportive they appear ready on the spring to intrap incautious deluded insects! What artifice! There behold one of the leaves just closed upon a struggling fly: another has gotten a work; its hold is sure, its prey can never escape—carnivorous vegetable! Can we after viewing this object, hesitate a moment to confess, that vegetable beings are endued with some sensible faculties or attributes, similar to those that dignify animal nature; they are organical, living, and self-moving bodies, for see here, in this plant, motion and volition”

Grow Your Own

Helping bog plants thrive requires re-creating the natural conditions for which they have evolved over thousands of years. We do not recommend growing indoors, as they require dormancy and direct sunlight.

  • Fresh Water: Bog plants rely on pure rainwater, well water, or distilled water. They will not survive treated municipal water from a sink or hose.
  • No Tickling: When planted outdoors, these plants can catch food on their own! But don’t attempt to stimulate or feed these plants: if the sensitive hairs, or trichomes, on a Venus flytrap are touched repeatedly, it will shut. Shutting requires a lot of energy—if it closes without a meal, the plant may suffer.
  • Climate Care: These plants are native to the mid-Atlantic and are comfortable growing outdoors year-round in our hardiness zone (7B). Mulch with pine needles if temperatures fall below 30°. Expect dormancy in the winter before they thrive again in the warmer months.
  • Soil Media: Bog plants grow in sphagnum peat moss, which can be mixed with some perlite or chemical-free sand. They will not tolerate regular garden soil or potting mixes.

Plant List

Plantings may vary slightly by season. 

  • Andromeda polifolia bog rosemary
  • Aletris farinosa true unicorn root 
  • Camaedaphne calyculata leatherleaf
  • Chamalerium luteum  false unicorn root
  • Calapogon tuberosa grass pink orchid
  • Calydorea coelestina Bartram’s ixia
  • Dionaea muscipula Venus flytrap
  • Drosera filiformis threadleaf sundew
  • Helonius bullata swamp pink
  • Iris prismatica slender blue flag
  • Kalmia angustifolia sheep laurel
  • Pinguicula spp butterwort
  • Pogonia ophioglossoides rose pogonia
  • Polygala lutea, orange milkwort
  • Sabatia kennedyana Plymouth Rose Gentian
  • Sarracenia alata x flava pitcher plant alata flava
  • Sarracenia alata x minor  pitcher plant alata x minor
  • Sarracenia alata x leucophylla pitcher plant alata x leucophylla
  • Sarracenia x ‘Bubba’s Sister’ ‘Bubba’s Sister’
  • Sarracenia x Catesbaei Catesby’s pitcher plant 
  • Sarracenia flava yellow pitcher plant
  • Sarracenia flava atropurpurea ‘Waccamaw’
  • Sarracenia flava x minor pitcher plant flava x minor 
  • Sarracenia flava var. maxima pitcher plant flava “Maxima”
  • Sarracenia flava var. ornata pitcher plant flava ornata
  • Sarracenia flava var. rugelii pitcher plant  flava rugellii
  • Sarracenia x ‘Green Monster’ ‘Green Monster’
  • Sarracenia x ‘Leah Wilkerson’ ‘Leah Wilkerson’
  • Sarracenia leucophylla x oreophila pitcher plant leucophylla x oreophila
  • Sarracenia leucophylla x pcitticina ‘Scarlet Belle’
  • Sarracenia x Moorei Moore’s pitcher plant
  • Sarracenia purpurea purple pitcher plant
  • Sarracenia purpurea x rubra ‘Maroon’
  • Sarracenia x ‘Red Sumatra’ ‘Red Sumatra‘
  • Sarracenia x ‘Snow Flake’ ‘Snow Flake’
  • Sarracenia x oreophila x leucophylla pitcher plant oreophila x leucophylla
  • Spiranthes odorata Ladies tresses orchid
  • Trientalis borealis starflower
  • Triadenum virginicum marsh St. Johnswort
  • Vaccinium macrocarpum cranberry
  • Vaccinium corymbosum highbush blueberry
  • Xyris caroliniana Carolina yellow-eyed grass

Upcoming Events

Saturday, October 17, 12:00 pm

SWWAG Workshop: Fire Cider Making at Mill Creek

Get Information

Wednesday, November 4, 4:30 pm

SWWAG Workshop: Putting the Farm to Bed to Prepare Your Winter Garden

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Boating & Fishing

Enjoy all that the Tidal Schuylkill River has to offer.

Flowers, Plants & Trees

See what’s blooming, find a favorite tree, and stroll the gardens and natural lands.

Gardening

Bring the Garden home! Shop for plants or grow food, trees, and more.

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Uncover the interconnected stories of this historic site.

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Calling Southwest students: paid internships available with the river, the farm, and the trees.