It depends on the soil that you have them in, and the nutrients that you are feeding them, if any. It also depends on the size of the pot that they are in. If in a small pot then they need to be transplanted to a bigger pot so the plants don't struggle with root binding. Ideally for soil grown plants, I would put them in a 3gallon pot or bucket. Just make sure it has good drainage holes.
For a cloner you will need 1 plastic "tote"(storage container with lid) which can be bought at walmart or home improvement stores. Here is one from walmart that is about right size for about 6-10 cuttings: hxxp://www.walmart.com/ip/Rubbermaid-6.5-Quart-Clever-Store-Container-Clear-Comfort-Blue-Set-of-10/16539898
You will need to get some neoprene pipe insulation from Lowes/home depot that is for 1/2" pipe:
http://www.homedepot.com/p/Armacell...lene-Pipe-Wrap-Insulation-OEP05838/100572787#
This you would cut into several pieces about 1-1/2" long. You will have plenty left over.
You can probably find the plastic tote at home depot or lowes that works like the one at walmart. You just need a small one that is
about 10" deep by 12"wide by 16" long (the exact size isn't critical as it can be bigger if you want. I just like one that is about 1-3gallon size so that it isn't too big for just 6-10 cuttings). If the tote is clear you will need to spray paint it brown or black to block light from getting to the roots.
Then you will need a real good fish tank air pump(one that has 2 hose connections) with a couple air stones that will fit inside the tote. You will need about 6-10' of air hose for the pump/airstone. While at the pet store to get the air pump and stone, get a 50watt fish tank heater.
get a 50watt heater that is has temp adjust:
http://www.petsmart.com/product/index.jsp?productId=2752191&f=PAD/psNotAvailInUS/No
Here is a good pump:
http://www.petsmart.com/product/index.jsp?productId=3742976&f=PAD/psNotAvailInUS/No
They have the air hose and stones. I would get this kind of stone as it works really well, just get the longest one that will fit inside the tote (get 2 of them):
http://www.petsmart.com/product/index.jsp?productId=2752197&f=PAD/psNotAvailInUS/No
That is all you will need for the bubbler. You will need to get a decent pH tester for checking your water so that you give your plants the best water and solutions possible.
To make the bubble cloner You will need to cut holes in the lid that are about 3/8" smaller in diameter than the diameter of the pipe insulation. I just equally space out the positions for the holes to be drilled so that they are about 1 inch (1") apart from each other (look at mine in the links that I sent you earlier). Some people use a knife to cut the holes but it is easy if you know someone who has a drill and some paddle bits. that you can use to drill the holes out with rather than fighting with a knife.
Once you have your holes cut, you just squeeze the cut pieces of insulation and press them into the lid so that they are sticking out both sides of the lid equally. I also drilled a couple holes for the air hoses to push through the lid rather than having them go through one of the cutting holes. Then connect one end of the 2 hoses to the 2 air-stones and the other ends to the air pump. Then the cloner is ready to go (unless you had to get a clear one, then you have to spray paint it so no light goes through to the inside. don't worry about the little bit of light that will go through the holes in the insulation collars where the cuttings sit).
I also recommend that you get some clonex gel and clonex solution. These are not absolutely necessary but will greatly increase your success of cloning new plants.
When I am ready to take cuttings, I put my tote in a good place where it can stay in good temps of mid 70s and not a lot of outside light but fresh air. I set my air pump, stones and heater in place then fill my cloner with water up to about 2" below the bottom of the lid. No closer as the water will rise when the air pump is turned on. Make sure you have nice vigorous air bubble action, like the water is at a hard boil. I then add my clonex solution to the water (at 15ml per gallon of water I believe, according to the clonex directions) I turn on the air pump and water heater(set to 79degrees), and let it bubble for about 1hr then I check the pH of the water. If it is between 5.7-6.3 then it is good. I prefer to have it right at 6.0 and the water at 78-80f for best results.
When that is all straight, I begin taking cuttings that are long enough to set down into the holes in the insulation and stick down into the water about 1". I like to cut my stems so that there are about 3-5 leaf nodes so that when I cut off some of the leaves, I still have several leaves at the top of the stem to hold the plant up. I cut the bottom so that it has about 1cm of stem below the lowest node where a leaf was removed. I cut that on an angle and then lightly skin the outer part off just a bit up to the node, and then I dip that into my clonex gel and set aside for about 10minutes before putting it into the cloner.