I saw questions from newbies on how to propagate begonias by leaf cuttings. I am not very much experienced on growing begonias, but I've done leaf propagations many times and love it.

There are pictures step-by-step on propagation of rex begonia:

1)Choose a healthy mature leaf (I use sometimes young leaves also)

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2) Cut the edges

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3)Make 2-3 wedge-shaped cuttings

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4)Plant them in the mix of peat moss and perlite 1:1 in little pots, water and tent them for a few weeks

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5) There are new plants grown on leaf cuttings planted on Sept,29

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Rex begonias are very easy to propagate this way. Other rhizomatous begonias can be propagated by whole leaf, it may take up to 2 month until new plants show up.

While under cover they need very seldom watering, but check to avoid drying.

After babies are formed you can take off cover.Water sparingly.