#1 Gallon
Penstemon 'Rock Candy Ruby' (often listed as P. barbatus 'Novapenrub') is a compact, drought-tolerant herbaceous perennial known for its intense ruby-red, bell-shaped flowers that bloom from late spring through fall. Growing 12–24 inches tall and wide, it is ideal for sunny borders, containers, and rock gardens. It attracts pollinators like hummingbirds and bees while being deer-resistant. 
 
Key Features and Care:
Color & Size: Vivid ruby-red flowers with green foliage, reaching 12 inches in height and spread.
Bloom Season: Late spring to early summer, with potential for repeat blooming if deadheaded.
Light Requirements: Full sun (at least 6+ hours) is required for best blooming.
Watering: Drought-tolerant once established; requires low to average water, making it perfect for xeric gardens.
Soil: Requires well-drained soil, preferably sandy or rocky; intolerant of heavy, wet, or clay soils.
Hardiness: Zones 5-8.