How to propagate iron cross begonia
Begonia masoniana
Quick answer
Iron cross begonia propagates best from leaf cuttings in spring or summer. Cuttings usually root in 4–6 weeks.
- MethodLeaf cuttings, Stem cuttings
- Best seasonSpring to summer
- Time to root4–6 weeks
- Pet safetyToxic to cats and dogs
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How to propagate by leaf cuttings
Iron cross begonia can be grown from pieces of leaf. New plants form where a main vein has been cut, so one leaf can give several.
- 01
Choose a healthy, full-grown leaf in spring or summer and cut it off with a short piece of stalk.
- 02
Turn it face down and cut it into wedges with a clean knife, each with a main vein running from the point where the stalk joined. Or keep the leaf whole and make short cuts across the main veins on the underside.
- 03
Push the wedges point down about 1 cm (0.4 in) into damp seed mix with extra perlite. Lay a whole leaf flat, underside down, and pin it so the cut veins touch the mix.
- 04
Cover the tray with a clear lid or bag to keep the air humid, and open it for a few minutes every few days.
- 05
Keep it in bright, indirect light at 18–24 °C (64–75 °F), with the mix lightly damp but never soggy.
- 06
Usually roots in 4–6 weeks. Small plantlets follow along the cut veins: pot each one up once it has a few leaves of its own.
Stem cuttings
Stem cuttings are a reliable way to propagate iron cross begonia. Each cutting contains a node (the small bump or joint where a leaf attaches), and that node is where new roots will grow.
- 01
Choose a healthy stem with at least one node and one or two leaves. In spring or early summer the plant is growing actively, so cuttings root fastest.
- 02
Cut just below a node using clean, sharp scissors or a knife. A cutting of 10–15 cm (4–6 in) with one or two leaves is ideal.
- 03
Remove any leaves from the bottom 5 cm (2 in) so they don’t rot in water or soil.
- 04
Water method: place the cut end in a glass of room-temperature water, keeping the leaves out of the water. Change the water every three days. Move to soil once roots are 2–3 cm (0.8–1.2 in) long.
- 05
Soil method: dip the cut end in rooting powder (optional), then push it 3–4 cm (1.2–1.6 in) into damp potting mix. Cover loosely with a clear bag to keep humidity high.
- 06
Keep the cutting in bright, indirect light and warmth (above 18 °C / 64 °F). Avoid direct sun, which wilts the cutting before roots form.
- 07
Roots typically appear within 2–5 weeks. New leaves alone do not prove that roots have formed. Check for visible roots or gentle resistance in the mix without pulling the cutting out. Once rooted, gradually increase ventilation and remove any cover over about two weeks before moving to normal care.
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Common questions
What is the best way to propagate iron cross begonia?
The most reliable method for iron cross begonia (Begonia masoniana) is leaf cuttings. It requires some care but is well within reach of most houseplant owners.
When should I propagate iron cross begonia?
The best time is spring to summer, when the plant is actively growing and roots form most quickly.
How long does it take iron cross begonia to root?
Expect roots to appear within roughly 4–6 weeks, given warm temperatures and good indirect light.
Propagation guidance is based on genus-level horticultural knowledge. Individual specimens can vary.
6 steps · 4–6 weeks · Last reviewed: