Ideal Temperature for Royal penstemon
Images of Royal penstemon
Signs of Cold Stress in Royal penstemon
Symptoms
Royal penstemon tolerates cold well, but winter temperatures should stay above 32℉. If temperatures fall below this point, while no immediate winter damage may be apparent, reduced or absent sprouting could occur in spring.
Solutions
During spring, remove any sections that have not germinated.
Signs of Heat Stress in Royal penstemon
Symptoms
Royal penstemon does not handle high temperatures well. When temperatures exceed 75℉, its development ceases, and it becomes more prone to decay.
Solutions
Remove any sun-scorched and desiccated portions. Relocate the plant to an area offering protection from intense midday and afternoon sun, or deploy a shade cloth. Water the plant in the morning and evening to maintain soil moisture.
