Dig a complete portion of a rhubarb plant system from the main patch of rhubarb. You will need to dig quite deep into the earth to ensure that you get a large crown from the main rhubarb patch.
Use a sharp knife to divide the clumps of larger rhubarb plants. There may be a number of side shoots attached to the crown you dug up; break off all of those side shoots.
Make sure that the crown you dig up has at least a couple of buds and a small portion of the rhubarb plant’s root system. Furthermore, keeping the roots wet and replanting the rhubarb plant section as soon as it is dug up is very important.
The best method to transplant the rhubarb is to place each of the dug up sections upright in holes dug in the earth, keeping the buds at least a couple of inches below the earth's surface.
The distance between consecutive transplanted rhubarbs should be at least 3 feet. This will ensure that the new plants have enough space to flourish. Water the plants thoroughly, especially during the first growing season. If you are living in a region that experiences harsh, dry climates, a deep soaking, 7 to 10 days apart, would prove extremely useful.
In order to pick a rhubarb plant, wait at least 2 years. Harvesting the rhubarb plants makes them stronger and more productive.
Harvesting rhubarb for 4 to 6 weeks is possible in the third year after it has been transplanted. In the 4th year after rhubarb has been transplanted, harvesting can be done for 8 to 10 weeks.