Kisambo Cycad (Encephalartos kisambo)

Kisambo Cycad

Encephalartos kisambo

Its stout, crown-forming fronds carry prehistoric elegance. Slow-growing cycad; common name: Kisambo Cycad.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full to partial sun; tolerates light shade, but consistent full sun supports dense, healthy frond growth
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Watering Water deeply when the top 10–15 cm of soil dries out; avoid waterlogging to prevent root rot
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Temperature Hardy to mild frost (down to 5°C); thrives in warm temperate to subtropical temperature ranges
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Characteristics

  • Leaves: Long, arching pinnate fronds, deep green, with sharp leaflets; up to 2.5 m long
  • Cones: Male cones are slender, yellow-brown; female cones are larger, barrel-shaped, green to brown
  • Trunk: Thick, cylindrical trunk covered in persistent, fibrous leaf bases
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Care Guide

Watering

Keep soil consistently moist but not soggy; increase frequency during hot, dry spells

Fertilization

Diluted balanced fertilizer once every 2 months. Use a low-nitrogen, slow-release fertilizer to support steady growth without promoting soft, vulnerable foliage

Eggshell powder topdressing:Sprinkle finely ground, dried eggshells on the soil surface; mix lightly into the top 2 cm of soil to boost calcium levels and improve soil drainage
Pruning
  • Remove brown, dead fronds at the base to maintain a tidy crown and improve airflow
  • Trim damaged or discolored leaflets to prevent pest infestation
  • Avoid cutting healthy fronds, as cycads grow slowly and replace foliage infrequently
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed toxic; cycasin exposure may lead to vomiting, diarrhea, lethargy, and potentially fatal liver failure

Humans: Contains cycasin, a hepatotoxic alkaloid; ingestion can cause abdominal pain, vomiting, and liver damage

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental landscape plant; historical traditional medicinal use is not recommended due to toxicity