Troubleshooting
Penstemon heterophyllus 'Electric Blue' problems — and how to fix them
Penstemon heterophyllus 'Electric Blue' (Penstemon heterophyllus 'Electric Blue') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Winter wet / root rot
The chief killer—wet, poorly drained soil in winter rots the crown. Plant in gritty, fast-draining ground or raised beds; protect in cold, wet regions.
Borderline hardiness
Less cold-hardy than digitalis types. In colder zones grow in a sheltered spot, mulch lightly and overwinter cuttings as insurance.
Sprawling, sparse bloom
Caused by shade or rich soil. Site in full sun on lean ground and shear lightly after flowering to keep it compact.
Short-lived plants
Often lives only a few years. Take cuttings regularly to maintain a supply of this cultivar.
Prevent penstemon heterophyllus 'electric blue' problems before they start
Most penstemon heterophyllus 'electric blue' issues are care-mismatch, not bad luck. Dial in the basics:
- Common foothill penstemon 'margarita bop' problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Penstemon heterophyllus 'Electric Blue' watering schedule
- Penstemon heterophyllus 'Electric Blue' light requirements
- Best soil mix for penstemon heterophyllus 'electric blue'
- Penstemon heterophyllus 'Electric Blue' temperature & humidity
- Full penstemon heterophyllus 'electric blue' care guide
Looking for penstemon heterophyllus 'electric blue' in general rather than its problems? Read the full penstemon heterophyllus 'electric blue' care guide — light, water, soil and feeding.
Penstemon heterophyllus 'Electric Blue' problems — FAQ
Why is my penstemon heterophyllus 'electric blue' winter wet / root rot?
The chief killer—wet, poorly drained soil in winter rots the crown. Plant in gritty, fast-draining ground or raised beds; protect in cold, wet regions.
Why is my penstemon heterophyllus 'electric blue' borderline hardiness?
Less cold-hardy than digitalis types. In colder zones grow in a sheltered spot, mulch lightly and overwinter cuttings as insurance.
Why is my penstemon heterophyllus 'electric blue' sprawling, sparse bloom?
Caused by shade or rich soil. Site in full sun on lean ground and shear lightly after flowering to keep it compact.
Why is my penstemon heterophyllus 'electric blue' short-lived plants?
Often lives only a few years. Take cuttings regularly to maintain a supply of this cultivar.