
by Plant Circle
Alocasia Care Tips
Curious why your Alocasia keeps struggling? Our founder Monika shares her hard-earned tips for growing these tropical stunners indoors—hint: it’s all about airflow and the right mix.
Across the EU
60€ in Germany | 100€ Europe*
Founded 2017 in Berlin
Across the EU
60€ in Germany | 100€ Europe*
Founded 2017 in Berlin
Across the EU
60€ in Germany | 100€ Europe*
Founded 2017 in Berlin
Alocasia cyrtosperma johnstonii 'Black Jack' | Fast EU shipping | Grown with love in the EU | Not pet-safe
Summary: With its almost black, deeply veined leaves and fierce upright stance, Black Jack transforms any room into a lush, tropical escape with minimal effort.
Thrives in bright, indirect light. Avoid direct midday sun to prevent leaf scorch. Ideal for east or north-facing windows, or a bright spot with filtered light.
Keep soil evenly moist but not soggy. Loves high humidity (over 60%) – use a humidifier or place near other plants to boost ambient moisture.
Use a chunky, well-draining aroid mix with orchid bark, perlite, and coco coir. Repot every 1–2 years to support rapid rhizome growth.
Toxic if ingested. Keep out of reach of pets and small children.
Grows from rhizomes that can be divided during repotting in spring. Each division should have at least one growth point for successful propagation.
May go semi-dormant in winter with slowed growth. Reduce watering accordingly and keep above 15°C to maintain foliage health.
Watch for spider mites and thrips, especially in dry conditions. Regularly wipe leaves to prevent dust build-up and pest hiding spots.
Native to Southeast Asian rainforests, Alocasia cyrtosperma johnstonii ‘Black Jack’ is prized for its dark velvety foliage and compact yet dramatic form, making it a must-have for European Alocasia collectors.
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Alocasia Cyrtosperma Jhonstonii ‘Black Jack’
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I ordered 4 different alocasia and they arrived in perfect condition. I live in Sweden and still the plants arrived in just a few days. I will for sure order from Plant Circle again!
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Plant Circle
Very fast shipping and good quality plants. I recommend100%
Stunning plant! Very well wrapped, fast delivery
Stunning plant! Very well wrapped, fast delivery
Its as gorgeous as the picture. Really good quality and wrapped very well.
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Very fast shipping and good quality plants. I recommend100%
Very interesting white leaves. Came with some yellowish ones probably from travelling. I can understand that plants with rare colours on their leaves may be more complicated to remain as received.
Beautiful colours.. loved it!
My whole order was better than expected and the shipment to Finland was fast! Will be supporting you from now on!
.. a must have beauty! Leaves change colour while growing(second picture).