Austrian: Arnolds Sentinel Pine
Pinus nigra
Austrian: Arnolds Sentinel Pine (Pinus nigra) is a tree suited to the Colorado Front Range, rated "Recommended for Most Sites" on the 2024 Front Range Tree Recommendation List. It matures to about 25–35 ft tall and 8–12 ft wide, slow-growing, needs medium water, and prefers full sun. Columnar forms.
medium water25–35 ft tall and 8–12 ft wideDeer-resistant
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At a glance
- Rating
- Recommended for Most Sites
- Botanical name
- Pinus nigra
- Variety / cultivar
- Austrian: Arnolds Sentinel, Frank
- Type
- Tree
- Mature size
- 25–35 ft tall and 8–12 ft wide
- Mature form
- Pyramidal
- Spacing / clearance
- ~12 ft of clearance
- Hardiness zones
- USDA 4–8
- Growth rate
- Slow
- Lifespan
- Long-lived
- Water needs
- medium water
- Sun
- Best in full sun.
- Colorado native
- No
- Foliage
- Evergreen
- Soil
- clay, loam, sandy
- Soil pH
- 6.0–8.2
- Hail tolerance
- high
- Wind tolerance
- high
- Salt tolerance
- moderate
- Pollinator value
- low
- Tolerates
- Hot south- or west-facing walls
Wildlife & ecology
- Pollinator value
- low
- Deer
- Generally deer-resistant
Common problems on the Front Range
- Mountain pine beetle in drought-stressed pines
- Pine wilt nematode (esp. Scots and Austrian pine)
- Pine needle scale
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 Austrian: Arnolds Sentinel Pine good for the Colorado Front Range?
- Yes, Austrian: Arnolds Sentinel Pine is a well-suited tree for Colorado's Front Range, rated "Recommended for Most Sites" on the 2024 Front Range Tree Recommendation List.
- How big does Austrian: Arnolds Sentinel Pine get?
- It matures to about 25–35 ft tall and 8–12 ft wide.
- How much room does Austrian: Arnolds Sentinel Pine need?
- Give Austrian: Arnolds Sentinel Pine about 12 ft of clearance from buildings, fences, and other trees so the mature canopy isn't crowded.
- What shape does Austrian: Arnolds Sentinel Pine grow into?
- Austrian: Arnolds Sentinel Pine typically grows into a pyramidal, conical outline that is widest at the base. This is the species' usual mature form, named cultivars (columnar, weeping, or compact selections) can differ, so check the specific cultivar.
- Is Austrian: Arnolds Sentinel Pine hardy on the Front Range?
- Austrian: Arnolds Sentinel Pine 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 Austrian: Arnolds Sentinel Pine need?
- It needs medium water once established.
- How fast does Austrian: Arnolds Sentinel Pine grow?
- Austrian: Arnolds Sentinel Pine is a slow-growing tree. Growth rate depends on water and site conditions on the Front Range.
- How long does Austrian: Arnolds Sentinel Pine live?
- Austrian: Arnolds Sentinel Pine is long-lived, a multi-generational tree given good siting and care. Actual lifespan varies with site, water, and care.
- Is Austrian: Arnolds Sentinel Pine native to Colorado?
- No. It is not a Colorado native, but it grows well on the Front Range.
- Is Austrian: Arnolds Sentinel Pine deer-resistant?
- Austrian: Arnolds Sentinel Pine is generally considered deer-resistant, though no plant is deer-proof when browse pressure is high.
- Is Austrian: Arnolds Sentinel Pine prone to pests or disease on the Front Range?
- Austrian: Arnolds Sentinel Pine can be affected by mountain pine beetle in drought-stressed pines 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.
