Gardening Interview Question:

I am trying to get some information on Manettia cordifolia or M. inflata (firecracker vine). How do I propagate them, and where can they be obtained?

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Manettia cordiflora can be propagated by taking stem-tip cuttings when the plant is in active growth, usually around mid-summer. Nodal cuttings are more likely to succeed, since some plants will not root internodally. Prepare each cutting from new growth, up to 4 inches long, by making a clean cut just below the node. Insert carefully in planting medium, water thoroughly with a fungicidal solution so that the medium is moist right to the container bottom.

Semi-ripe cuttings are used by taking the current season's growth that has begun to firm; the base of the cutting should be quite hard, while the tip should be actively growing and therefore quite soft. Take semi-ripe cuttings in mid-to late-summer or even in early autumn. Take between 21/2 to 4 inches for the cutting. Remove the side shoots, and trim the cutting. Wound the stem and apply a coating of rooting hormone, shaking off any excess.

Semi-ripe cuttings may be rooted in a variety of situations. One suggestion is an outdoor nursery bed that has been amended with soiless potting mix and can be covered and protected so that the cuttings don't scor or dry out. They require a humid environment for the rooting process to take place. A cold frame or container will work well also. During the winter inspect the cutting regularly and remove any fallen leaves. Water if the medium shows signs of drying out. Gradually harden off the cutting in spring before placing it in the garden.
Submitted by: Administrator