Hello,

It is generally recommended that home gardeners stop harvesting rhubarb in early to mid-June. Continued harvest through the summer months can weaken the plants and reduce the yield and quality of next year's crop. The rhubarb stalks may become somewhat woody by mid-summer, but they don't become poisonous. If you're craving some rhubarb go ahead and cut a few stalks.

While early spring is probably preferable for transplanting, rhubarb can be transplanted in early fall (mid-September to early October).

Dig deeply to insure getting a large portion of each plant's root system. Large rhubarb plants can also be divided. Divide large clumps with a sharp spade or butcher knife. Each section (division) should have at least 1 or 2 buds and a portion of the root system.

Replant the rhubarb as soon as possible. The roots must not be allowed to dry out prior to planting. If the rhubarb can't be planted immediately, place the clumps in a plastic bag and store them in a cool, dark location. This temporary storage should be fine for a few days.

When planting rhubarb, place each section upright in the planting hole with the buds 1 to 2 inches below the soil surface. You may want to resist harvesting stalks from your transplanted rhubarb next year to allow it to settle in and regain its vigor.  Use your best judgment, keeping in mind that the more leaves allow the rhubarb to produce more energy to reestablish.