Purple Beardtongue (Penstemon cobaea)
Purple Beardtongue (Penstemon cobaea)

Purple Beardtongue (Penstemon cobaea)

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Binomial

Penstemon cobaea
This is one of Missouri's most spectacular plants with many violet to rose-purple, snapdragon-like flowers atop 16-24 inch stems. In cultivation, 16 to 20 flowering stems per plant are possible. The flower color can vary from nearly white to deep purple.

Missouri Primrose is the perfect companion plant for purple beardtongue; the combination of yellow and purple is very showy. They are both at the peak of their blooming periods at the same time: late May and June.

Purple beardtongue is native to southwest Missouri's limestone glades. Glades are hot, dry, and sunny--the midwest version of a desert. This means that you don't need to amend your poor soil with organic material or manure. If anything, this species might benefit from a little lime.

Uses: nectar source for butterflies, moths and hummingbirds; drought tolerant; deer resistant; host plant for Dotted Checkerspost (Poladryas minuta), rock gardens
Bloom time: May & June

Height: 18 to 30 inches
Space: 16 to 20 inches

Sun: Full sun
Moisture: Dry to average (if the soil stays too wet, the plant may rot)

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