Plants

Japanese sago palm, sago palm fern

Cycas revoluta

Kathrin Auer Kathrin Auer

The Japanese sago palm captures our attention with fern-like leaves and a palm-like trunk. Here’s how to plant and care for Cycas revoluta.

Growth height (from)
from 200.00cm to 300.00cm
Growth characteristics
  • upright
  • overhanging
Flower color
  • yellow
Flowering time (month)
  • May to July
Flower shape
  • Cones
Flower characteristics
  • dioecious
Leaf color
  • green
page format
  • feathered
  • narrow
  • duster
Sheet properties
  • evergreen
Fruit color
  • orange
  • red
Light
  • scattered light to semi-shade
Soil type
  • sandy to loamy
Soil Moisture
  • fresh to moderately humid
ph value
  • neutral to weakly acidic
Lime compatibility
  • lime-tolerant
Nutrient requirements
  • moderately nutritious
Humus
  • rich in humus
Decorative or utility value
  • Flower Decoration
  • Leaf ornaments
  • picturesque growth
Toxicity
  • toxic
Climate zones according to USDA
  • 10
Use
  • Interior greening
  • Planters
  • Winter garden
Garden style
  • Pot garden

Origin

The Japanese cycas (Cycas revoluta), also known as the Japanese sago palm, is native to Japan and South-east Asia. Botanically it belongs to the genus of the sago palm ferns (Cycas) within the Cycadaceae family. , which are also known as living fossils, are among the oldest plants in the world and grow relatively slowly. However, they can get very old and develop into imposing ornamental trees as they age. Cycas revoluta are of great horticultural importance: In the Mediterranean region, the species is often planted in gardens and parks, in our latitudes the Japanese cycad can be cultivated wonderfully as a houseplant or container plant.

Growth

In the first few years, the Cycas revoluta is quite slow in its growth; only later does it develop the short, thick and cylindrical stem. A new wreath of leaves grows from the trunk about every one to two years. Visually, the sago palm look like palm trees, but in other characteristics they are closer to ferns. In its natural habitat, the Japanese sago palm is usually around 9.84 feet high, and a height of 6.56 feet is also possible in a container. Caution: All parts of the sago palms are poisonous.

Leaves

The large, simply pinnate fronds of the Japanese sago palmare deep green and leathery and grow to 1.64 to 6.56 feet long. They are composed of narrow, linear, very dense leaflets. The unfolding of the young leaves is interesting: Similar to young ferns, they are initially rolled up. In the case of the Japanese sago palm fern, they appear later rolled back at the edges - this is highlighted by the botanical species name "revoluta" (rolled back). At the base of the fronds, the leaflets gradually narrow until they appear thorny. The leaf stalks are slightly square shaped.

Cycas revoluta leaves

The male flower of the Japanese cycad (Cycas revoluta) appears cone-shaped

Flowers

The flowers develop from May, but only in very oldJapanesesago palms. The plants are dioecious, which means that each plant only bears male or only female flowers. The male flowers look cone-shaped, the female flowers stand like a densely hairy, yellowish tuft in the middle of the leaf wreath. Even in the natural habitat, however, it is not always guaranteed that both sexes are close enough to be pollinated by the wind or insects.

Fruit

Cycas revoluta belongs to the gymnosperm group, which means that the felt-like, hairy ovules are not enclosed by carpels. The seeds, which ripen from September to October, are orange to red in color.

Location

Cycas revoluta loves a non-windy, warm and bright place. The light should come from all sides as far as possible, as is the case in a greenhouse or conservatory. If the outside temperature rises to an average of 20 degrees Celsius, the Japanese sago palms feels at home in a well-protected place outdoors. We recommend places in the light shade of trees or buildings, because the Japanese sago palm is a bit sensitive to direct sunlight. The temperature in its winter home should be around 59 degrees Fahrenheit.

Cycas revoluta

Cycas revoluta loves a very bright place, but should be protected from direct sun during noon

Substrate

For the sago palm sandy, permeable potting soil or cactus soil are suitable. Mixed in expanded clay also improves the substrate structure. The pH should be around six. In any case, ensure that the container plant has good drainage. Because palm ferns are quite sensitive to waterlogging.

Watering

Keep the soil moderately moist for the Japanese sago palm in summer . It is particularly important to ensure sufficient watering when the leaf fronds grow. However, longer dry phases are better tolerated than waterlogging. It is best to use rainwater or tap water with lowlime content for watering. Occasionally you can also spray water over sago palm. In winter it must be watered sparingly. As the temperatures drop, its water requirements reduce.

Fertilizing

From April to September the Cycas revoluta must be fed a mild dose of liquid organic fertilizer every two weeks. The plant does not tolerate mineral fertilizers well. The plant must not be fertilized from October till new shoots are formed.

Repotting

Since the Japanese sago palm grows quite slowly, repotting of the plant can be done at the most every three to four years. The best time for this is spring. The new pots or containers need not be much larger than the previous one.

Pruning

Therefore, you should protect the long-lived old leaves and not cut them back heavily. Therefore, you should protect the long-lived old leaves and not cut them back heavily. Dead fronds usually fall off on their own, but can also be removed with a clean, sharp knife.

Japanese sago palm (Cycas revoluta)

Even in winter, the Japanese cycad (Cycas revoluta) prefers a bright, warm place

Overwintering

The Cycas revoluta must be placed in a bright spot during the winter months, at best in a conservatory or a greenhouse. The temperatures for the frost-sensitive plant should not fall below 50 to 59 degrees Fahrenheit. During this time, the Japanese sago palmmust be watered sparingly and should not be fertilized at all. The cycad must be acclimatized to the sun by gradually bringing it out in the sun.

A sowing of the Japanese sago palm is a long drawn process and not that easy. Since the seeds quickly lose their ability to germinate, they must be sown soon after they mature. A soil temperature of around 86 degrees Fahrenheit is important for germination. Choose a shady spot and keep the substrate moist until germination. Alternatively, Cycas revoluta can also be propagated using the stem tuber. These often form on old stems. They are separated and the cut surfaces are sprinkled with charcoal. They are then allowed to take root in soil at 68 degrees Fahrenheit.

Diseases and Pests

Cycads are quite robust and there are hardly any plant diseases or pests. With the potted plants, however, you have to watch out for and scale insects. Brown leaves can indicate dry air or drought stress.

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