Penstemon plants are mostly deciduous or semi-evergreen perennials. Penstemon is a large genus of around 250 species, mostly found in North America and East Asia. They grow with opposite leaves which are partly tube-shaped. The height of these plants range from 10 cm to as long as 3 mtrs.
Penstemon Garnet: Grows in bushes and is a vigorous perennial plant. Deep wine-red flowers borne in erect spikes beautify its look during early summer and late autumn. Garnet can grow up to a height of 3 feet if it has perfect conditions which include exposure to full sun and availability of well-drained soil with low to medium moisture content. This showy flower attracts bees and hummingbirds and is best used for decoration of beds and borders in gardens.
Penstemon King George V': King George V' is an erect perennial which has lance-shaped leaves and grows to a height of 90 cm. It grows well when exposed to full sun and partial shade in sheltered surroundings. For best results it should be planted in well-drained soil with acid, alkaline, and neutral pH. It needs to be protected overwinter with dry winter mulch. King George V is also vulnerable to slugs and snails attack, hence, it is required that use appropriate countermeasures against these pesky pets.
Penstemon Rose: Penstemon rose blossoms in summer and late summer with bright bubblegum-pink flowers. This plant requires well-drained soil and full sun. Penstemon rose needs to be fertilized once in a month. With right care it can grow up to a height of 61 cm. These plants are drought and heat tolerant; and are known to attract hummingbirds.
Penstemon Purple: Penstemon purple grows with tall spikes of grape colored, nectar-rich flowers which are very attractive to hummingbirds. These plants are very adaptable and can grow well in a variety of soil conditions. Penstemon purple can be used for bordering purposes as it has cascading growth habit.