General Question

lilakess's avatar

How do I grow a new herb plant from a branch of an existing larger plant?

Asked by lilakess (779 points ) June 21st, 2007

There's a huge rosemary bush in my backyard and I want to grow a new plant. I cut a branch and have it sitting in a jar of water hoping new roots will sprout, but some how this doesn't seem like enough. Suggestions?

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5 Answers

bpeoples's avatar

This seemed like a good, down to earth, guide to it: http://www.nothyme.com/plantpropagation.cfm

peggylou's avatar

The best way to get another plant would be to dig up a small part of your big plant, including the roots. Then repot it. Make sure it is watered well (but don't drown it). Also, if you are putting it into a pot, place some little rocks or pebbles in the bottom of the pot (make sure the pot has drainage hole) and then add the plant and more potting soil.

gooch's avatar

Use root starter. You can buy it at any nusery. just dip it them plant the cutting and it will grow.

AnswerMan1980's avatar

Here’s an article on Rosemary Propagation from botany.

From the article, “PROPAGATION: Cuttings can be made from firm side shoots, about 9 inches long, in late summer or early fall. In mild climates, they can be inserted in a trench that’s 5 inches deep, outside or in a cold frame. The following autumn, the rooted plants are set out, 1 foot apart, in a nursery bed. In the ensuing year, they may be planted in their permanent places. The tips of the shoots should be pinched often while they are still small to encourage bushiness. Cuttings, 3 to 4 inches long, will form roots quickly, in sand, in a cool greenhouse or terrarium.”

pinky134's avatar

Try putting the sticks of rosemary in dirt in a shady place and keeping them moist. Some plants won’t root in water, just dirt. Root hormone couldn’t hurt either… :) Good luck!

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