How to Grow Con Underwood Bell Heather
Con Underwood Bell Heather
Erica tetralix 'Con Underwood'
shrubCon Underwood is a cultivar of cross-leaved heath, a dwarf evergreen shrub prized for its vibrant crimson-red flowers that bloom from summer through fall. This compact, low-growing variety is popular in rock gardens, moorland gardens, and container plantings for its attractive foliage and prolonged flowering period. It reaches only 12-18 inches tall, making it ideal for small spaces and alpine collections.
When should you plant Con Underwood Bell Heather in your zone?
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Example Con Underwood Bell Heather timeline · Pittsburgh, PA (Zone 6b)
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Plant Con Underwood Bell Heather
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Con Underwood Bell Heather
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-7; can be grown in zone 4 with winter protection
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Get my Con Underwood Bell Heather timeline →Growth Stages
Establishment
3-6 monthsYoung plants are small with sparse, fine, needle-like foliage; minimal flower production
Water regularly to establish roots; mulch lightly with bark chips around base (avoid piling against stem); protect from drying winds in first winter
Vegetative Growth
Spring through early summerFoliage expands and becomes denser; plant develops low, spreading habit with fine, linear, gray-green leaves arranged in whorls
Maintain consistent moisture; apply balanced fertilizer (low nitrogen, ericaceous formulation) in spring if needed; prune lightly after flowering to maintain compact shape
Flowering
July through OctoberDense racemes of small, bell-shaped crimson-red flowers appear at stem tips; blooms are nectar-rich and attract bees and hoverflies
Deadhead spent flowers to encourage continued blooming; ensure adequate moisture during hot spells; do not apply nitrogen-rich fertilizer as it reduces flowering
Dormancy
November through MarchFoliage persists but growth slows; flowers fade; plant enters semi-dormant state in winter
Reduce watering slightly but do not allow soil to dry completely; provide wind protection in exposed locations; no pruning needed over winter
Spring Renewal
March through MayNew growth emerges from buds; foliage becomes more vibrant; plant prepares for next flowering cycle
Resume regular watering as growth increases; prune dead or damaged growth in early spring; apply spring feed if growth appears weak
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Inspect regularly; remove badly infested shoots; spray with insecticidal soap or neem oil if damage is severe; encourage natural predators
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Maintain humidity by misting; improve air circulation; spray with water to dislodge; use miticide if infestation is severe
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Ensure good drainage and air circulation; avoid overhead watering; spray with sulfur or fungicide if fungal growth appears; remove affected stems
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Improve drainage; avoid waterlogged soil; do not plant in poorly drained sites; remove and destroy severely affected plants
Uses
Rock Gardens & Alpine Collections
OrnamentalCon Underwood's compact size and fine-textured foliage make it ideal for rock gardens, scree beds, and alpine troughs. Its low, spreading habit provides year-round structure and summer color. [source]
Pollinator Habitat
WildlifeThe nectar-rich crimson flowers attract bees, butterflies, and hoverflies from July through October, providing essential late-season forage for pollinators as other plants decline. [source]
Cut Flowers & Floral Design
HouseholdThe long-lasting flowers can be cut for fresh arrangements or dried for dried flower crafts, adding texture and color to bouquets and maintaining their structure for weeks. [source]
Container & Patio Gardening
OrnamentalIts dwarf habit makes it perfect for pots, containers, and raised beds filled with ericaceous compost. Containers allow gardeners in alkaline regions to grow this acid-loving plant successfully. [source]
Low-Maintenance Moorland & Heather Gardens
OrnamentalOnce established, Con Underwood requires minimal feeding and pruning, making it ideal for low-input, naturalistic heather gardens that evoke moorland landscapes. [source]
Harvest Tips
This is an ornamental shrub grown for flowers and foliage, not harvested for food. Cut flower stems for floral arrangements when flowers are fully open; cutting promotes bushier growth. Deadhead faded flowers to extend blooming season through fall.
Fun Facts
- 🌱 Erica tetralix is one of only three native heaths in the British Isles; the other two are Calluna vulgaris and Erica cinerea. It thrives in wet, boggy moorland where other plants struggle.
- 🌱 The name 'Con Underwood' honors a legendary plant collector and hybridizer; this cultivar was selected for its unusually vibrant crimson-red flowers compared to typical pink forms of Erica tetralix.
- 🌱 Despite being small and delicate-looking, established Erica tetralix plants are remarkably long-lived (20+ years) and tough, enduring windswept moorland, poor soil, and extreme weather.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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