One of the easiest ways to produce new plants that are genetically identical to their parent is by taking leaf cuttings. This ensures the offspring will exhibit the same growth and flowering traits as their progenitor. The simplest method is to use a complete leaf with its stalk (or petiole) still attached. Cuttings may be taken at any time of the year, provided the parent plant is in active growth and a selection of fresh, new, fully expanded leaves are available.
Here's how to propagate houseplants using leaf cuttings:
1. Fill a clean seed tray or container (at least 20 centimetres wide) with a sterile, soilless mixture specifically formulated for propagating seeds and cuttings (available at most garden centres) to one centimetre below the rim. Tamp down evenly so the soil surface is firm but not hard-packed.
2. Slice suitable leaves cleanly from the parent plant, leaving about four centimetres of the petiole attached to each cutting; use a sterile knife or a single-sided razor blade to ensure the least possible damage.
3. With a clean dibble or knitting needle held at a 45-degree angle, make several small holes in the soilless mixture. Insert the leaf cuttings so the petiole is below the surface and the bottom of the leaf blade is resting on top. When all the cuttings are in place, firm the mixture around their bases and water in lightly.
Illustrations by Cybèle Young
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2 Comments
You list African Violets as plants that you can propagate. If you mist these leaves with water won't that kill them?
Hi mcbarbara, You are quite correct in thinking that most plants with hirsute (hairy) leaves don't like wet foliage--in fact, the hairs are there to repel moisture coming in contact with the leaf surface. Nevertheless, high humidity levels are required for successful rooting, and misting several times a day gives the foliage time to dry off, while providing the necessary atmospheric humidity. The other alternative is to place a clear plastic dome over the leaves you intend to root, but in my experience, this "closed system" approach almost guarantees fungus and bacterial infection. Another point to consider is that in their (Saintpaulia ionantha) natural environment (Tanzania) they do get rained on regularly; it's just not recommended for indoor culture. Many thanks for posting your thought-provoking comment! Stephen Westcott-Gratton, Horticulturist Editor-at-Large, Canadian Gardening