6. Lettuce – 30 Days
Another cool-weather vegetable that prefers temperatures between 60?F and 70?F, lettuce seeds should be sown in early spring and late summer. Of the five types of lettuce – loose-leaf, cos, crisphead, butterhead, and stem – leaf lettuce varieties like green leaf and red leaf are among the easiest to cultivate and are more tolerant of hot weather. Planting new seeds every 14 days will provide a continuous harvest.
7. Spinach – 30 Days
Able to survive in temperatures as low as 15?F, spinach is a cold hardy vegetable that can be planted as soon as the ground thaws. Pluck outer spinach leaves from the plant as it grows or re-sow seeds every two weeks for successive harvests. Don’t wait too long to gather spinach because its leaves will become bitter once the plant reaches maturity.
8. Arugula – 30 Days
Since arugula seeds germinate well in cooler soil, they can be planted as soon as the garden bed can be worked after the spring thaw. Sow seeds every two to three weeks for continuous harvesting.
9. Kale – 30 Days
A “cut-and-come-again” plant, kale’s young and tender leaves can be culled continually throughout the growing season once the plant is about 2 inches tall. Avoid picking the central bud, since this keeps kale growing and productive.