Leafy greens grow best when the average air temperature is 28degrees. For most climates, moderate days like this are hard to come by. Lettuce planted outside in the spring or fall is likely to endure just as many snow days as hot days. By planting your greens in your greenhouse in the early spring and late fall, you can maximize the number of temperate days and not have to worry about snow crushing your delicate plants. Some greens, like kale and radishes, can be grown straight through the winter in many climates.

Microgreens are basically seedlings of vegetables and herbs. They're easily grown in shallow containers and are perfect for any style of greenhouse. They can even be grown indoors.

Spinach is a cold and hardy leafy vegetable. It is a common product that can be grown all year round. Most spinach thrives in cool weather. Pests are normally not a challenge, especially for a newbie. They have comparable growing conditions as lettuce, but they are more nutritious.

Plus, greens are super easy to grow. They don't require much upkeep and don't consume a lot of nutrients. Aside from keeping the soil moist and watching the temperature on sunny days, all you need to do is harvest those nutritious leaves.
 

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