Here’s a detailed description of the Blackstone (also known as Black Stone or Kasturi) mango, a striking and somewhat rare dwarf mango cultivar:

🌳 Plant Overview
Common Names: Blackstone mango, Black Stone mango, Kasturi mango

Scientific Name: Mangifera indica (cultivar ‘Blackstone’/‘Black Stone’)

Origin: India (available as grafted live plants)
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🌿 Tree Characteristics
Size & Habit: A semi-dwarf mango tree, typically reaching 3–6 m (10–20 ft) tall, with a dense, compact canopy

Leaves: Glossy dark green mango foliage forming a shade-providing canopy

Growth in Containers: Suitable for pot planting; height at maturity around 12–15 ft when managed as semi-dwarf
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🥭 Fruit Description
Size & Shape: Small to medium-sized fruits (roughly 150–300 g), oval to round
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Skin: Distinctive dark purple to blackish exterior when ripe
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Flesh Texture & Flavor:

Juicy and fiberless with a mild sweetness

Not as sugary as high-end cultivars, making it excellent for salads, pickles, and other uses where a lighter sweetness is preferred
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🌱 Cultivation & Care
Sunlight: Full sun (6–8 hrs daily); can also tolerate partial shade
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Soil: Prefers well-drained, fertile loamy soil (pH 5.5–7.5)
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Watering:

Daily watering recommended for first 2–3 years

After establishment, only during droughts; ensure soil stays moist but not waterlogged
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Fertilizer: Monthly application of organic fertilizer during growth seasons; avoid chemical overuse
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Pruning: Trim in late winter/spring to shape canopy and remove dead wood
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Potting Tips:

Repot with quality potting mix (soil, coco peat, compost, perlite) when root-bound
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Water only when topsoil (~2 cm) is dry
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🐞 Pests & Diseases
Common mango pests like seed weevils and fungal issues (e.g., anthracnose) may occur; recommended treatment with organic sprays such as neem oil
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✅ Summary
The Blackstone mango is an eye-catching semi-dwarf cultivar featuring:

Compact growth ideal for container gardening

Dark-hued, mildly sweet, fiberless fruit perfect for salads, pickling, and fresh enjoyment

Straightforward care with regular watering, organic feeding, pruning, and sun exposure.