Philadelphia Lily, Prairie Lily Wood Lily

Lilium philadelphicum

Family: Liliaceae (lil-ee-AY-see-ee) (Info)
Genus: Lilium (LIL-ee-um) (Info)
Species: philadelphicum (fil-uh-DEL-fee-kum) (Info)
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9 - Species

Flower Habit:

(a) Up-facing


12-18 in. (30-45 cm)

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)


9-12 in. (22-30 cm)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

Sun Exposure:

Full Sun

Bloom Color:


Bloom Time:

Late Spring/Early Summer

Mid Summer

Flower Shape:


Bloom Size:

3" to 6" (76 mm to 150 mm)

Color Pattern:




Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:


Amston, Connecticut

Erie, Michigan

Missoula, Montana

Red Rock, Ontario

Leesburg, Virginia

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Gardeners' Notes:


On Sep 7, 2009, foxtrax from Plymouth, IN wrote:

So far, so good. I have planted 30 seeds and about half have sprouted. They have to be exposed to light to sprout. I know it will be a long time before they flower, but it will be worth it. I will probably be 75 by the time they flower.


On Jul 19, 2009, EffieH from Amston, CT (Zone 6b) wrote:

BNBWildflowers Store on eBay sells these seeds. My husband and I just saw these growing wild on the power lines in Glastonbury, Connecticut and I just had to look them up. They are so beautiful!! I'm not good at seed-starting, but I might try some to see what happens.


On Jan 21, 2005, nevrest from Broadview, SK (Zone 3a) wrote:

Lilium philadelphicum grows wild in Saskatchewan in areas where they have not been eradicated by spraying, overgrazing and careless picking.
It is the floral emblem of Saskatchewan.
From seed they take four or more years to produce flowers.
The tiny scales on the bulbs will also produce new bulbs and flower in about htree years.
Most effective in a group and shown off by other contrasting wildflowers such as harebells, blazing star.and Lady slippers


On Jan 20, 2005, JodyC from Palmyra, IL (Zone 5b) wrote:

American Indians used root tea for stomach disorders,coughs,fevers:to expel placenta;exterally for swelling,bruises,wounds,sores.Flowers poulticed for spider bites.