Question
I have 2 dracaenas in one urn. They are 15 years old and are nearly 12' tall. I want to cut them back and root the cut pieces. I tried to dry root them witout success. Can I root them using a root hormone or just stick them in water?


Answer
Hello Harold,

You could try a rooting hormone but you're best bet would be the cane cutting method or air layering.

Just to save some time, this is just a copy/paste from another question i was asked about rooting Dracaenas (corn plants).

If you cut your corn plant down you can root the stems you cut off as well as keep the lower stems which will begin to branch again. Be careful about watering the plant after all the leaves are gone. It wont be using as much water without leaves and you also shouldn't fertilize.
To root the severed stems you can use any house plant mix (i use miracle grow mix) that's mostly peat and organic matter. There are 3 methods you could use to root them as well.
First, you could simply stick the stems into slightly moist soil. Keep it slightly moist and in a warm place for about a month and it should grow roots.
The second method is using cane cuttings. You would use this if you wanted to have more than one plant or just wanted some backups.
Cane cutting is about half way down the page.
http://www.hort.purdue.edu/ext/HO-37web.html

The third method is airlayering. Air layering is a little more time intensive and complicated but the new plant will already have roots when it is planted in the ground giving it a better chance of surviving.  

http://aggie-horticulture.tamu.edu/extension/ornamentals/airlayer/airlayer.html

Good luck,
Justin