Penstemon campanulatus

Bells Penstemon

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A compact perennial native to coastal California featuring striking blue bell-shaped flowers and grey-green drought-tolerant foliage.
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Plant Details

Common Name Bells Penstemon
Family Plantaginaceae
Genus Penstemon
Species Campanulatus
Origin USA (California)
Blooming Spring to early summer with tubular blue flowers
Leaf Color Grey-green to dark green
Sunlight Sun
Category Outdoor plants
Pet Friendly check Yes
yard

Care & Maintenance

terrain
Soil

Well-drained sandy or loamy soil, low fertility preferred for optimal growth

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Watering

Water regularly during establishment. Drought tolerant once mature; reduce watering in winter dormancy.

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Sunlight & Care

Full sun required for best flowering, tolerates partial shade in hot climates

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Fertilization

Low fertilizer needs; apply balanced slow-release granular fertilizer in early spring only.

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Pruning

Deadhead spent flowers to encourage rebloom; cut back foliage after flowering or late winter.

Pest Control Aphid Leafhopper Slug Spider Mite

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 3 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 12 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
39° – 90°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
30% – 85%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
10000 – 60000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
15 – 30
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
15% – 60%
% volumetric
Water content in the growing medium
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Soil EC
350 – 2000
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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