Giant Alumroot
Heuchera maxima
Essentials
At a Glance
Plant Type
Perennial
Height
30 inches
Width
18 inches
Light
Partial Sun, Shade
Zones
7, 8, 9
Water
Moderate
Humidity
Moderate
Lifespan
Perennial
Native To
Channel Islands, California
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Heuchera maxima is known for its attractive foliage and flower spikes, making it a popular choice for shade gardens. It has a unique tolerance for varying soil types and can thrive in both sandy and loamy soils.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seedlings into well-drained soil in early spring.
- Water regularly to keep soil moist but not waterlogged.
- Mist cuttings to maintain humidity during propagation.
- Fertilize with a balanced, slow-release fertilizer in spring.
- Divide clumps every 2-3 years in early spring or fall.
- Mulch around plants to retain moisture and suppress weeds.
Pro Tip
Plant in partial shade with rich, well-draining soil for best foliage color.
Keep It Thriving
Care Guide
Do
- Water consistently to keep soil moist 🌱
- Apply mulch to conserve moisture
- Divide plants every few years for vigorous growth
- Fertilize in early spring to promote lush foliage
Don't
- Avoid overwatering to prevent root rot ❌
- Don’t expose to full, harsh sun which can scorch leaves
- Refrain from heavy pruning in late fall
- Don’t ignore pest signs early
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Mulch | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Giant Alumroot questions
What zones can Giant Alumroot grow in?
Giant Alumroot is hardy in USDA Zones 7–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Giant Alumroot deer resistant?
Yes — Giant Alumroot is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Giant Alumroot bloom?
Giant Alumroot typically blooms in early summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Giant Alumroot need full sun?
Giant Alumroot does best in part shade.
Is Giant Alumroot drought tolerant?
Yes — once established (usually after the first full season), Giant Alumroot handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Heuchera to compare
Mixed Coral Bells
Heuchera sanguinea 'Mixed Coral Bells'
Midnight Rose Coral Bell
Heuchera x brizoides 'Midnight Rose'
Electra Coral Bells
Heuchera sanguinea 'Electra'
Wildberry Coral Bells
Heuchera x brizoides 'Wildberry'
Palace Purple Coral Bells
Heuchera americana 'Palace Purple'
Obsidian Coral Bells
Heuchera villosa 'Obsidian'
Keep exploring
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Grow Giant Alumroot with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
