Is It Possible to Grow Medicinal Herbs All Year in a Greenhouse?

Climate Control for Year-Round Growth

To grow medicinal herbs all year in a greenhouse, you’ll need to maintain a consistent temperature between 65°F and 75°F (18°C and 24°C). This range allows for optimal growth of most herbs. Use a heating system, such as a propane or diesel-powered generator, and insulation to regulate temperature fluctuations. You can also use a ventilation system to control humidity and prevent overwatering.

Lighting Requirements for Herbal Growth

Medicinal herbs need sufficient light to thrive. In a greenhouse, you can use LED grow lights or natural sunlight. Aim for at least 12 hours of supplemental lighting per day during the winter months when sunlight is scarce. For example, a 2’x4’ LED grow light array can provide the necessary light for a small herb garden. Be mindful of the light spectrum, as some herbs require specific wavelengths.

Choosing the Right Medicinal Herbs for Year-Round Growth

Select herbs that are suitable for greenhouse cultivation, such as basil, mint, chamomile, and lemongrass. These herbs are relatively low-maintenance and can thrive in a controlled environment. Consider factors like hardiness, disease resistance, and growth habits when selecting medicinal herbs for your greenhouse. Some herbs, like chamomile, can be harvested multiple times throughout the year, providing a continuous supply of medicinal plants.