








Magnolia grandiflora 'Alta'
- Regular price
- $1,500.00
- Sale price
- $1,500.00
- Regular price
-
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.
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
FORM & SHAPE
2. Growth & Environmental Conditions
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
FROST TOLERANCE
Frost Tolerant – Can handle light to moderate frost once established.
AUSTRALIAN NATIVE?
No
3. Practical Uses & Flowering
USES:
FLOWER COLOUR
White
FLOWER TYPE
FLOWERING PERIOD
Planting Tips
Plant Spacing
Ensuring A Strong Start
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:
- 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. - 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. - 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. - Weather Considerations:
Adjust watering based on weather conditions. Increase frequency during hot, dry periods and reduce it during cooler, wetter seasons. - 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
Growing Your Magnolia grandiflora 'Alta' in Various Soil Types
FAQ
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