Cilantro needs its own space in the garden where you can harvest it and then let it go to seed. It grows fast in the cool weather of spring and fall, creating a rosette of lacy leaves. When the weather gets warm, the plant sends up a long, lanky flower stalk bearing flower clusters with white or pinkish blossoms that later produce coriander seeds. Plant cilantro in a bed devoted to herbs where it can reseed, or in a corner of the vegetable garden. In mild climates, cilantro makes a h

Lift kohlrabi from your garden when the mid-stem bulbs swell to 2 to 3 inches in diameter. (Turnips that form bulbs below the soil are best harvested at about the same size.) Don’t let kohlrabi bulbs grow much larger or they will rapidly become woody.