Not knowing where you are makes it difficult to guess when the time is right. When I take cuttings of bushes, I try to make them a minimum of 6 inches long. I cut off any flowers, buds and fruit. I then strip off the leaves, about 2 inches worth on the bottom of the cuttings making sure there are at least 2 leaf nodes present ... the leaf nodes are just above the base of the leaves on the plants .. where new growth comes out if you prune off the top of the plant. At this point if you are using rooting hormone you want to dip the stripped end in the rooting powder. Make sure you have at least 2 leaf nodes covered. Then take some soil from around the 'mother plant' and mix it with new potting mix, about 50/50 in a small pot then stick your finger in the middle of the soil and plant your cuttings with at least 2 leaf nodes under the soil, or just poke holes in the soil around the "mother plant" and plant accordingly.
The reason why I like to include 'mother plant' soil is because the roots of plants actually change the chemistry in the soil around them. By adding some of the 'mother plant' soil you are telling the cutting it is 'home' and they don't, at least for me, stress out as badly.
You'll want to keep the soil around your cuttings on the dry side of moist and keep the pot in a bright but shaded area and spritz them with water a few times a day until you start to see new growth.
Some cuttings root/strike fast .. others can take weeks/months and even years. After a few weeks, tug gently on the cuttings. If they don't come up easily they probably have rooted. check the bottom of the pot and see if you see roots coming out the bottom. If you do then it's time to repot. Use my No Stress Plant Repotting Method.
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