Silene Species, Royal Catchfly

Sileneregia

Family
Caryophyllaceae (kar-ree-oh-fil-AY-see-ee)
Genus
Silene (sy-LEE-nee)
Species
regia (REE-jee-uh)
Synonym
Melandrium illinoense
Melandrium regium
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
Height
36-48 in. (90-120 cm)
Spacing
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
Hardiness
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)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Bloom Color
Red-Orange
Bloom Time
Mid Summer
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Blue-Green
Where to Grow
Grow outdoors year-round in hardiness zone
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
From seed; stratify if sowing indoors
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Montgomery, Alabama

Fairfield, California

Wheat Ridge, Colorado

Cordele, Georgia

Lula, Georgia

Valparaiso, Indiana

Cedar Falls, Iowa

Derby, Kansas

Shawnee Mission, Kansas

Benton, Kentucky

Belton, Missouri

Elsberry, Missouri

Saint Louis, Missouri

Lincoln, Nebraska

New Milford, New Jersey

North Tonawanda, New York

Selden, New York

Rock Hill, South Carolina

Green Bay, Wisconsin

Pewaukee, Wisconsin

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Gardener's Notes:

6
positives
1
neutral
0
negative
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J
Collierville, TN | July 2022 | positive

It's now blooming in my zone 7b garden. Eye catching bright red blooms!

P
Valparaiso, IN | May 2013 | positive

Native to the U.S., Royal Catchfly is a rare plant that has endangered status in Illinois and many other states. Attracts hummingbirds. T...Read More

F
Rock Hill, SC (Zone 7a) | April 2011 | positive

This wonderful prairie beauty is growing extremely well here in the piedmont of S.C. It doesn't get full sun but bloomed the first year ...Read More

P
P
North Tonawanda, NY (Zone 6a) | March 2011 | positive

This plant showed up a year ago in a border bed across the front of the house. It bloomed in late summer and I was thrilled to see that ...Read More

C
Lula, GA (Zone 7b) | July 2009 | positive

I've had this plant for two years. It took a while to settle in but is now 4' tall and has startling scarlet-red blooms in a large 'head....Read More

D
D
Cedar Falls, IA (Zone 4b) | July 2007 | positive

Very attractive vivid red flowers, and a good native prairie plant to attract hummingbirds. Along with cardinal flower (lobelia cardinal...Read More

J
J
Palmyra, IL (Zone 5b) | January 2005 | neutral

Red is an uncommon color among prairie plants because many pollinating insects (e.g., bees) are insensitive to this range of the light s...Read More

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