Kale and spinach grow well together in a combined winter garden because they share the same cultural requirements. The plants grow quickly, with both greens usually ready for the first harvest within 50 to 70 days. Plant fall crops when the average daily temperature drops below 75°F
Sow kale and spinach seeds three inches apart and a half inch deep. Leave 18 inches of space between kale rows and 12 inches between spinach rows.>- Mist the bed with water to keep the top few inches of soil moist until the seeds germinate, which takes around seven days.
Thin the seedlings after the seeds germinate and produce their second set of leaves so both the kale and spinach in the row sit 12 inches apart.
Weed between the plants once or twice a week so you remove weed seedlings before they have a chance to establish and compete with the kale and spinach. Hoe between plants to break up the top one-inch of soil to prevent weeds from taking hold, or pull all weeds by hand.
Kale and spinach both provide a reliable leafy green in the cooler seasons. In mild climates, where temperatures rarely drop below 20°F, both vegetables can produce through the winter.