#6 Watercress 

If arugula and rocket are some of the leafy greens that are almost never missing from your salad mix, then you are going to love growing watercress in your garden. Not only does it have the same peppery leaf taste as the two aforementioned ones, but it is also a perennial vegetable!

The only drawback it has is that it is a little fussy as a plant, and it can be a bit finicky to grow. Yet, if you love a challenge, this little plant is going to be the best one for you. After all, a lot of the best things take a lot of work to get, don’t they? And the reward for your hard work will be in the form of this green vegetable that’s full of vitamins A and C, as well as other minerals, such as iron, niacin, and thiamine!