Herbs - Herb Propagation - Cuttings

Most perennial herbs may be propagated by rooted cuttings. This is usually done in the spring when the plants are in a vigorous stage of growth. NOTE: It is important to work quickly so the cuttings do not become wilted before being transplanted. It is also a good idea to have ready small pots, approximately 2 to 3 inches deep. Fill with thoroughly watered soil-less medium and root stimulating hormone, if desired. Also have ready a small container of alcohol to disinfect your cutting tool between cuttings.

Using a sharp clean knife or scissors, cut between 3 to 4 inches of new growth from a healthy stem, usually just above or below a node or leaf. After taking 10 to 15 cuttings, seek refuge in a shaded potting area and prepare your cuttings.

First, carefully remove all leaves from the lower half of the cutting using sharp scissors or a knife, or by sliding your thumb and index finger down the stem. Dip the cut end into root stimulating hormone, if desired, and stick the cutting into the prepared pot so that the leaves almost touch the surface. A pencil or plant dibble will also accomplish this goal.

Repeat this process for all the cuttings you have. Place finished pots in a leak-proof carrying tray. At this point you will want to use a rooting box -- basically a box that holds flats of plants over a heat source. It is quite easy to build yourself by using an old wooden crate and placing it over a 25 watt light bulb in a suitable electrical fixture. Bottom heat greatly encourages root growth. The temperature in the rooting box should be 23 - 28°C.

Following this, place your rooting box in a shaded, cool, humid area (approximately 16 - 18°C) and place your carrying tray on top. It is important to constantly mist the cuttings so the leaves do not wilt and you will need to do this several times daily. After approximately 10 days, gently tap one or two of the cuttings out to check for root growth. By this point you should see them starting, but it will take about 21 days for sufficient roots to form for the plant to be ready to be transplanted to the garden. At this point there should be enough roots developed to hold the growing medium together. Plants are also ready for transplant when you start to see new top growth.