Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct
Magnolia grandiflora 'Alta' - Evergreen Trees Direct

Magnolia grandiflora 'Alta'

300L:Approx. 3.7–4.1m tall
100L:Approx. 2.8–3.0m tall
40cm/45L:Approx. 1.6–2.0m tall

Please note: These height guides are approximate, as we work with live plants and natural variation is expected. The measurements provided reflect typical stock sizing but may vary between batches.

Size
Regular price
$1,500.00
Sale price
$1,500.00
Regular price
Tax included. Shipping calculated at checkout.
A GRADE STOCK, EVERY TIME.

Learn About Your New Magnolia grandiflora 'Alta' - Alta Southern Magnolia

Magnolia grandiflora 'Alta', known as Alta Southern Magnolia, is a majestic evergreen tree valued for its glossy dark green foliage and large, fragrant white flowers. Growing 10–15 meters tall and 6–9 meters wide, it has an upright, pyramidal form with a well-structured crown.

This cultivar thrives in full sun to partial shade, adapts to various soils, and tolerates urban pollution. It requires moderate maintenance and regular watering during establishment but becomes drought-tolerant over time. Ideal as a specimen or shade tree, Alta Southern Magnolia adds timeless elegance and captivating fragrance to gardens, parks, and urban landscapes.


Plant Profile
Planting & Spacing Tips
Post Planting Care
Tips for Various Soil Types

1. Botanical & Physical Characteristics

BOTANICAL NAME:
Magnolia grandiflora 'Alta'
GENUS:
Magnolia
BOTANICAL SPECIES:
grandiflora
COMMON NAME:
Alta Southern Magnolia
FAMILY:
Magnoliaceae
EVERGREEN / DECIDUOUS:
Evergreen (foliage year round)
FOLIAGE TYPE
  • Broad
FORM & SHAPE
  • Narrow
  • Columnar

2. Growth & Environmental Conditions

GROWTH RATE
  • Medium Growth Rate
EXPECTED GROWTH PER YEAR

Approx 30 – 50 cm per year (moderate)

MATURE HEIGHT

6m - 10m Approximately

MATURE WIDTH

6 – 9 meters

SUNLIGHT EXPOSURE
  • Full Sun
FROST TOLERANCE

Frost Tolerant – Can handle light to moderate frost once established.

AUSTRALIAN NATIVE?
No

3. Practical Uses & Flowering

USES:
  • Feature Tree
  • Screening or Privacy
  • Avenue Planting
  • Shade Tree
FLOWER COLOUR
White
FLOWER TYPE
FLOWERING PERIOD
  • Summer
  • Autumn

Planting Tips

Plant Spacing

Feature Planting: Space 6 – 9 m apart for full form and canopy development

Hedging & Screening: Space 3 – 4 m apart for tall, formal evergreen screening

Avenue Planting: Space 5 – 6 m apart for structured, upright silhouette

Ensuring A Strong Start

How to plant Magnolia grandiflora 'Alta'

  • Choose a location with well-drained soil and full sun to partial shade.
  • Dig a hole twice as wide and as deep as the root ball.
  • Amend the soil with compost or other organic matter as needed.
  • Place the tree in the hole and backfill with soil, pressing firmly to eliminate air pockets.
  • Water thoroughly and mulch around the base to retain moisture and suppress weeds.

Root Ball Dimensions (Width × Depth) for Planting

Use this as a reference when digging your planting hole. We recommend digging at least 10% wider than the dimensions below to encourage strong root development.

  • 30cm Pot: 33cm (W) × 30cm (D)
  • 40cm/45L Pot: 44cm (W) × 41.5cm (D)
  • 50cm Pot: 49.5cm (W) × 35.2cm (D)
  • 70L Pot: 55cm (W) × 41.8cm (D)
  • 100L Bag: 50.6cm (W) × 52.8cm (D)
  • 100L Pot: 66cm (W) × 49.5cm (D)
  • 150L Bag: 66cm (W) × 55cm (D)
  • 200L Bag: 71.5cm (W) × 60.5cm (D)
  • 300L Bag: 88cm (W) × 63.8cm (D)
  • 400L Bag: 99cm (W) × 66cm (D)
  • 500L Bag: 122cm (W) × 66cm (D)
  • 750L Bag: 134cm (W) × 69cm (D)
  • 1000L Bag: 146.3cm (W) × 71.5cm (D)
  • 2000L Bag: 176cm (W) × 82.5cm (D)

Post Planting Care

When planting a new tree or shrub, proper watering is essential to ensure healthy establishment and long-term growth. Follow these guidelines to give your plant the best start:

  1. Immediately After Planting:
    Water generously right after planting to settle the soil around the roots and eliminate air pockets. This helps the roots make good contact with the soil.
  2. First Three Months (Establishment Phase):
    The initial three months are critical for root development. Water deeply twice daily (morning and evening) to encourage strong, deep root growth.
  3. Irrigation Systems:
    If using an irrigation system, adjust it to provide adequate water during the establishment phase. Ensure the water reaches the root zone without overwatering.
  4. Weather Considerations:
    Adjust watering based on weather conditions. Increase frequency during hot, dry periods and reduce it during cooler, wetter seasons.
  5. Ongoing Care:
    After the establishment phase (3 months), gradually reduce watering frequency but ensure the plant receives consistent moisture, especially during dry spells.

Long Term & Ongoing Care

Caring for Your Tree:

  • Watering: Provide consistent moisture, especially during the first few years. Deep watering is essential for the tree's overall health.
  • Pruning: Minimal pruning is needed, primarily to remove dead or diseased branches. Prune lightly in late winter or early spring.
  • Fertilization: Apply a balanced, slow-release fertilizer in spring to promote healthy growth and vibrant flowering.

Growing Your Magnolia grandiflora 'Alta' in Various Soil Types

How to Grow in Different Soil Types

Magnolia 'Alta' prefers moist, well-drained soil, but is adaptable to a variety of conditions:

Sandy Soil: Add organic matter and mulch to retain moisture.

Clay Soil: Improve drainage with compost and gypsum to prevent waterlogging.

Loamy Soil: Ideal for strong root establishment and healthy growth.

Acidic or Alkaline Soil: Prefers slightly acidic to neutral soil, but tolerates mild alkalinity.

Here is what customers like you frequently ask

FAQ

Frequently asked questions

Q: When does Magnolia grandiflora 'Alta' bloom? A: The tree blooms in late spring to summer, producing large, fragrant white flowers.

Q: Is Magnolia grandiflora 'Alta' drought tolerant? A: Yes, the tree is tolerant of drought once established.

Q: What is the mature size of Magnolia grandiflora 'Alta'? A: The tree can reach a height of 12-18 meters and a width of 4-6 meters.

Q: Can Magnolia grandiflora 'Alta' be used as a screen or shade tree? A: Yes, the tree is suitable for use as a screen or shade tree, and its evergreen foliage provides year-round interest.

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