Holden Rhododendron
Rhododendron subgenus x 'Holden'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Shrub
Height
48 inches
Width
48 inches
Light
Partial Sun, Shade
Zones
4, 5, 6, 7, 8
Water
Prefers consistently moist soil
Humidity
Moderate to high humidity
Lifespan
50+ years
Native To
Horticultural origin
Toxicity
All parts are highly toxic if ingested
The Story
Plant Bio
A compact evergreen shrub with attractive foliage and vibrant flowering. Noted for its cold hardiness and ability to thrive in shaded areas.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
We couldn't find this plant listed online right now.
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Planting
How to Grow
- Choose a partially shaded location with well-draining, acidic soil.
- Tuck roots into a hole twice as wide as root ball, then backfill gently.
- Water thoroughly after planting to settle soil and eliminate air pockets.
- Mist cuttings regularly to maintain humidity and promote rooting.
- Apply mulch around the base to conserve moisture and regulate soil temperature.
- Fertilize with an acid-loving plant fertilizer in early spring.
Pro Tip
Use organic compost to improve soil acidity and boost plant health.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist but not waterlogged 🌱
- Prune after flowering to shape and remove dead wood
- Mulch annually to retain moisture and suppress weeds
- Fertilize with acid-specific fertilizer in early spring
- Provide shelter from harsh winter winds
Don't
- Avoid overwatering which can cause root rot ❌
- Do not fertilize with alkaline fertilizers
- Never prune in late summer or fall
- Avoid planting in heavy clay soils without amendments
- Refrain from exposing to direct, intense sunlight
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Fertilize | ||||||||||||
| Mulch | ||||||||||||
| Prune |
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
Holden Rhododendron questions
What zones can Holden Rhododendron grow in?
Holden Rhododendron is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Holden Rhododendron deer resistant?
Yes — Holden Rhododendron is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Holden Rhododendron bloom?
Holden Rhododendron typically blooms in mid-spring through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Holden Rhododendron need full sun?
Holden Rhododendron does best in part shade.
More Rhododendron to compare
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Rhododendron x hybrida 'Double White'
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Rhododendron maximum
Bone Hardy Azalea
Rhododendron obtusum 'Bone Hardy Azalea Sampler'
Praecox Rhododendron
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Elite Star Rhododendron
Rhododendron x hybrida 'Elite Star'
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Holden Rhododendron 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.
