FICUS RETUSA BONSAI

The Ficus Retusa Bonsai: The Force of Nature in the Home

Ficus Retusa (often confused with Microcarpa or called "Ficus Ginseng" in commercial versions) is the culturist of bonsai trees. Massive trunk, often full of aerial roots that descend from the branches like lianas, and glossy dark green leaves. It is the number one species for beginners because it is forgiving of almost everything except cold. But don't underestimate it: in the hands of an expert, a Ficus can become a "Banyan" style masterpiece, evoking tropical jungles.

Origin & species

It comes from Southeast Asia (Malaysia, Philippines, Borneo). It is a fast-growing tropical evergreen tree. Its unique characteristic is its ability to emit roots from branches that, upon touching the ground, lignify to become secondary trunks. This allows it in the wild to cover huge areas.

Exposure and Microclimate

Ficus loves light, but is adaptable.
Summer: May through September it must live outside. Half shade or full sun (if accustomed gradually) will make it burst with health, producing smaller, thicker leaves.
Winter: It is an obligatory indoor plant in our climates. It should be withdrawn when temperatures drop below 12-15°C. Place it near a bright window, away from drafts and radiators.

Watering

It can tolerate short dry spells thanks to its fleshy leaves and thick roots, but it wants regular water to grow well.
Water generously when the potting soil begins to dry out.
The secret: Ambient humidity. Spray the foliage daily (especially in winter with the heat on) to keep the leaves healthy and stimulate aerial root emergence.

Water quality

Undemanding. Room temperature tap water is fine. Avoid ice-cold water that will shock tropical roots.

Substrate

Needs to be draining but retain some moisture, since it often lives indoors.

  • Recommended mix: 60 percent Akadama (for drainage and structure) and 40 percent quality ready potting soil (for water retention).
  • If it is always outside in the South, you can increase the organic part.

Repotting

This is done in late spring (May-June), with the stable heat. Ficus is very vigorous: you can drastically reduce the roots without fear (down to 1/2 or 2/3), he will respond with vigor. Use pots glazed, which retains moisture better and matches the glossy foliage.

Fertilization

He is a glutton. Fertilize year-round if kept warm (reduce doses in winter). In spring and summer use nitrogen-rich fertilizers to push vegetation and enlarge the trunk.

Flowering and fruiting

Produces green or yellowish syconia (small figs), which are inedible. In bonsai they are a minor detail compared to the majesty of the roots.

Structure pruning

Can be done year-round, but large cuts heal better in summer. Beware of white latex leaking from cuts: it is irritating and stains. Dab with water.

Maintenance pruning

Continuously prune off elongating shoots ("run off") leaving 2-3 leaves. If the bonsai loses shape or the leaves get too big, you can defoliate completely in June (only if the plant is very healthy): the new leaves will be tiny.

Binding & bending

Branches are very flexible ("rubbery"), but the wire etches the bark very quickly because the branch swells quickly. Check the wire every 15-20 days in summer!

Diseases and pests

Two main enemies:

  • Mealybug: White flecks or brown scuds. They lurk everywhere.
  • Red spider mite: If the air in the house is too dry. Misting helps prevent it.
  • Thrips: They cause deformed and spotted leaves.

Winter & protections

Absolute protection from frost. Below 10°C it starts to suffer and lose leaves. In the house, try to give it as much light as possible.

Annual calendar

  • January-March: Bright location indoors, clean leaves, moderate water.
  • April: Light fertilization, prepare to take it outside.
  • May-June: Move it outside, repotting, defoliation.
  • July-August: Abundant water, explosive growth, green pruning.
  • September-October: Moving back indoors, pest control.
  • November-December: Indoor maintenance, misting.

Useful products for this bonsai

Frequently Asked Questions about Ficus Retusa

Why does it lose its leaves as soon as I move it?
Ficus is habit-forming. Any change in light or temperature causes stress that causes the leaves to fall off. Find the right place and don't move it.

Can I get aerial roots down in my house too?
It is difficult but possible. You need very high humidity (greenhouse effect). Try covering the trunk with moist sphagnum moss or putting the plant in a clear bag for a few weeks in summer.

Why are the new leaves light green?
This is normal; newborn leaves are light and tender. They will turn dark green and leathery with time and proper fertilization.