How to Select Kohlrabi:
When picking out kohlrabi, you want to select ones that have a smooth skin without cracks. Depending on the variety, they may be light green, white or crimson in colour. If the leaves are attached (they are sometimes sold separately), they should be firm and green – avoid yellow leaves.
How to Store Kohlrabi:
Store the bulbs and leaves separately, preferably in perforated plastic bags. While the leaves should be used within several days, the bulbs will last for about two weeks.
There are several varieties available, including white, purple and green. The purple colour is limited to the outer layers though; inside is generally all pale yellow.