Dioon spinulosum, giant dioon, or gum palm, is a cycad endemic to limestone cliffs and rocky hillsides in the tropical rainforests of Veracruz and Oaxaca, Mexico. It is one of the tallest cycads in the world, growing to 12m in height. The tree is found at low elevations to 300 m above sea level.Dioon spinulosum prefers well-drained soil with regular water. It will grow in soils containing few nutrients, in soils rich in limestone, and on slopes. It is hardy to USDA Zones 9B – 11. Dioon spinulosum has pinnate leaves that grow to about 5–7 ft (1.5-2.1 m) in length and radiate out from the trunk. The 120-240 leaflets on each leaf are small and flat, have small thorns and taper to a sharp point.
Gum palm is resistant to disease and typically not susceptible to illnesses. In terms of care, this plant is fairly low-maintenance. Planted outdoors, it needs only minimal watering, and larger specimens usually do not require pruning. Smaller plants, however, should be pruned after they have finished blooming. Gum palm is suitable for anyone with an outdoor area, such as a garden or deck, and does not need extensive care experience.
How to keep Dioon Spinulosum.
Light
Gum palm occurs naturally in habitats like forest understories or rocky areas, where it grows under natural shade. It prefers partial sun but can tolerate full sun or full shade, showing its adaptable and hardy nature.
Water
The gum palm thrives in arid conditions and is highly drought-tolerant, requiring water only once every one to two weeks. Although it is typically grown outdoors, it prefers well-drained soil, which emphasizes its suitability for environments with low water availability.
Temperature
Gum palm comes from tropical areas, where the climate is generally warm and humid. As a result, it is well suited to high temperatures and moisture. It does not tolerate abrupt temperature changes and prefers a steady temperature environment, so it's important to prevent temperature fluctuations indoors. It typically cannot withstand cold and needs warmer conditions to grow. If the surrounding temperature falls too low, the plant may stop growing or even die.
Fertilizer
The gum palm has distinct nutrient needs and does not require heavy fertilization. Fertilizing in spring is best for encouraging optimal growth. Supplying nutrients enhances its health, increases its resistance to pests and diseases, and helps sustain its long lifespan.
Pruning
The gum palm benefits from pruning dead fronds in early spring. Be careful not to over-prune, as it can stress the plant. This practice improves air circulation, reduces pests, and maintains the palm's aesthetic appeal. Use clean tools to make precise cuts and reduce the risk of disease, following seasonal guidelines to promote optimal growth.
Botanical profile.
- Plant Type
- Palm
- Life Cycle
- Perennial
- Genus
- Dioon
- Family
- Zamiaceae
- Hardiness Zone
- 9-11
- Mature Height
- 4.88 m to 10.06 m
- Mature Spread
- 3.05 m to 4.88 m
- Leaf Color
- Dark Green
- Leaf Type
- Evergreen
- Bloom Time
- Late spring, Early summer
- Planting Time
- Spring, Summer, Autumn
- Harvest Time
- Late summer, Early fall, Mid fall
- Native Area
- Mexico
Other names.
