This is how to make a new lemon plant by cutting the stem
How to take lemon tree cuttings
Here are the thing that your need
To take cuttings from your selected tree, first locate small branches that aren’t holding fruit. Cut lengths about 8-10 inches long leaving all the leaves intact for now. These are a little longer than the final planted cutting. I use new wood identified by its lack of bark and green stem color.
Take as many cuttings as you feel like planting. For this example I used 12 cuttings to fill a gallon pot. For these cuttings I used a damp paper towel to wrap up the cuttings and then
put these into a paper cup for transport to my house.
Once home, gather the required materials together and begin the planting process. I wouldn’t wait overnight to start this but in a pinch you could put them in water to hold them until you had time to plant. Fill the gallon pot with your potting soil and soak this soil thoroughly. New soil has a tendency to repel water at first if it is very dry. Using a pencil or similar sized object, poke as many holes as you have cuttings a few inches deep in the soil in a pattern that will allow each plant to have more or less equal space between them. Now for the cuttings you took earlier. Take each cutting one by one and cut off all but 3 upper leaves. Remove any forming fruit buds by pinching them off. Then make a cut on the stem removing the lower part of the stem and leaving you with a cutting of the desired planting length about 6- 8 inches. I make an angled cut on the stem with the theory that it increases surface space of the cut, thus increasing rooting area.
After making this cut dip the plant in your can of rooting hormone about as deep as you intend on planting the cutting. Rooting hormone powder keeps the plants from getting stem rot and encourages cuttings to take root. I use Rootone because it’s what I’m familiar with and I have always had reliable results from it, but I have recently seen some organic alternatives offered, however I haven’t talked to anyone that has tried it. You could also try to root them with no rooting powder and probably get some success but the powder it cheap insurance for success.
Stick this cutting into one of your previously made holes trying not to rub off too much of the rooting powder. This is you last chance to position you cutting at the height you prefer and with the remaining leaves oriented how you like. When positioned to your liking, gently pack the soil around the stem with your fingers.
Repeat these steps with the remaining cuttings until the pot is filled. My finished pot of cuttings looked like this.
So that’s the hard part. Now its just a matter of keeping this pot moist and warm and waiting. If you live in a non freezing environment you could probably just leave this outside and keep it moist. I put mine in a cold frame I have to protect them from the occasional frosts we get. You could bring it in the house if you have the space. It doesn’t require bright sunlight to make the cuttings root. Don’t leave it in total darkness however. Most important is to keep the cuttings in a warm average light environment with good supply of moisture. Drying out the soil, especially in the early stages will almost certainly result in total loss. You could also use one of the available heating pads for placing under the pot of cuttings and this would probably speed up this process, but this article focuses on keeping costs and complexity to a minimum.