"A cucumber in the morning has the qualities of a diamond, a cucumber in the day has the qualities of a cucumber and a cucumber at night has the qualities of a rock"
Cucumber is actually a berry, and has an interesting history. As you can well imagine, it is cool, heavy and sweet. It's high water content raises Kapha, but it cools Pita and refreshes Vata.
It is very heavy and cold, so take it moderation, and not straight out of the fridge. Save cucumber for warmer weather, and it's best not eaten at night time or you may wake up with a stuffy nose or a cold. Cucumber is best not eaten in combination with milk.
Cucumber is excellent for dry, hot skin disorders, including sunburn. For Vata it is best taken warm so add sticks of cucumber to sturfries, or chunks to dahl just a minute before serving. Serve it with warm, digestive spices.