Is Penstemon barbatus a perennial?
Penstemon barbatus, commonly called southwestern penstemon, is native to rocky slopes and open woodlands from Utah and Colorado to Arizona, Texas and Mexico. It is a clump-forming perennial that typically grows 1.5-3′ tall.
How do you care for Penstemon barbatus?
Penstemons need very little water and barely any fertilizer. Fertilize lightly when planting and then never again. Over fertilizing Penstemons leads to excessive die back in the winter.
How do you grow Penstemon barbatus?
Penstemon performs best grown in a slightly dry to moist, well-drained medium with a slightly acidic pH: 5.8 to 6.2. Many commercially available peat- or bark-based growing mixes work well, provided there is adequate drainage.
When should I plant Penstemons?
spring
When to plant penstemons March to mid May is an ideal time to plant; the soil will be warming up in spring, the roots will quickly settle in, and the plants start putting on growth.
How tall do penstemon get?
Penstemon
| genus name | Penstemon |
|---|---|
| height | 6 to 12 inches 1 to 3 feet 3 to 8 feet |
| width | 8 to 20 inches |
| flower color | Blue Purple Red Orange White Pink Yellow |
| foliage color | Blue/Green Gray/Silver |
Do you deadhead penstemon?
Any penstemon will flower best in full sun but will grow happily in light shade, albeit with a less dramatic display. But flowering will always be improved and extended by deadheading regularly, which encourages the plant to make new flower spikes right up to the first frosts.
Are Penstemons Hardy?
Hardy penstemons Hardiness rating 4 (-10°C to -5°C). Hardy through most of the UK apart from inland valleys, at altitude and central / northerly locations. May suffer foliage damage and stem dieback in harsh winters in cold gardens. Plants in pots are more vulnerable.
Do Penstemons spread?
If you are hoping to have your penstemon plants freely seed around your garden, make sure to leave a few stalks on the plants so they can fully ripen and disperse.
