Mount Royal Plum
Prunus 'Mount Royal'
Mount Royal Plum (Prunus 'Mount Royal') is a tree suited to the Colorado Front Range, rated "Recommended" on the 2024 Front Range Tree Recommendation List. It matures to about 12–20 ft tall and 12–18 ft wide, needs medium water, and prefers full sun. Self fruitful plum.
medium water12–20 ft tall and 12–18 ft wideToxic to dogs
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At a glance
- Rating
- Recommended
- Botanical name
- Prunus 'Mount Royal'
- Variety / cultivar
- Mount Royal
- Type
- Tree
- Mature size
- 12–20 ft tall and 12–18 ft wide
- Mature form
- Rounded
- Spacing / clearance
- ~18 ft of clearance
- Hardiness zones
- USDA 4–8
- Growth rate
- Moderate
- Lifespan
- Medium
- Water needs
- medium water
- Sun
- Best in full sun.
- Colorado native
- No
- Foliage
- Deciduous
- Soil
- clay, loam, sandy
- Soil pH
- 6.0–8.2
- Hail tolerance
- moderate
- Wind tolerance
- moderate
- Salt tolerance
- moderate
- Bloom time
- early spring, mid spring
- Pollinator value
- high
Wildlife & ecology
- Pollinator value
- high
- Deer
- Not deer-resistant
Common problems on the Front Range
- Borers (peachtree and lesser borer)
- Black knot (galls on twigs)
- Aphids and leaf curl
These are general tendencies for this group of plants on the Front Range, not a diagnosis. Many are stress-driven and preventable with good siting and watering. For a specific plant or an active problem, consult a certified arborist or your local CSU Extension office.
Frequently asked questions
- Is Mount Royal Plum good for the Colorado Front Range?
- Yes, Mount Royal Plum is a well-suited tree for Colorado's Front Range, rated "Recommended" on the 2024 Front Range Tree Recommendation List.
- How big does Mount Royal Plum get?
- It matures to about 12–20 ft tall and 12–18 ft wide.
- How much room does Mount Royal Plum need?
- Give Mount Royal Plum about 18 ft of clearance from buildings, fences, and other trees so the mature canopy isn't crowded.
- What shape does Mount Royal Plum grow into?
- Mount Royal Plum typically grows into a broad, rounded crown, the classic shade-tree silhouette. This is the species' usual mature form, named cultivars (columnar, weeping, or compact selections) can differ, so check the specific cultivar.
- Is Mount Royal Plum hardy on the Front Range?
- Mount Royal Plum is hardy in USDA 4–8. The Colorado Front Range spans roughly USDA 4b–6a, so it is well within range.
- How much water does Mount Royal Plum need?
- It needs medium water once established.
- How fast does Mount Royal Plum grow?
- Mount Royal Plum is a moderate-growing tree. Growth rate depends on water and site conditions on the Front Range.
- How long does Mount Royal Plum live?
- Mount Royal Plum has a moderate lifespan for a Front Range tree. Actual lifespan varies with site, water, and care.
- Is Mount Royal Plum safe for dogs?
- No. Mount Royal Plum is considered toxic to dogs. Keep pets away and check with your vet.
- Is Mount Royal Plum deer-resistant?
- No. Mount Royal Plum is not considered deer-resistant and may need protection where deer browse.
- Is Mount Royal Plum prone to pests or disease on the Front Range?
- Mount Royal Plum can be affected by borers (peachtree and lesser borer) and other issues common to this group on the Front Range. These are general tendencies, not a diagnosis, many are stress-driven and preventable with good siting and watering. For a specific plant or an active problem, consult a certified arborist or CSU Extension.
