10 Tips for Growing Microgreens: A Comprehensive Guide

Microgreens have gained immense popularity in the world of horticulture due to their vibrant colors, intense flavors, and impressive nutritional profiles. These young and tender plants are harvested at the cotyledon or first true leaf stage, making them an excellent addition to salads, sandwiches, and garnishes. Whether you're an experienced horticulturist or a beginner with a green thumb, this step-by-step guide will provide you with essential tips to successfully grow microgreens and enjoy a bountiful harvest.

Select the Right Seeds

Before you start growing microgreens, it's important to choose high-quality seeds. Look for reputable suppliers who offer organic or untreated seeds specifically labeled for microgreens. Popular microgreen varieties include:

• kale
• broccoli
• radish
• sunflower
• green pea

See our selection of seeds.

Prepare the Growing Medium 

Once you have your seeds, prepare the growing medium. Microgreens can be grown in various mediums, such as potting soil, coco coir, or rockwool (we suggest Grodan Cress Plates). For soil-based growing, use a sterile seed-starting mix or potting soil enriched with organic matter. Ensure the medium is well-draining, as excessive moisture can lead to mold or root rot.

Optimize Lighting

Provide your microgreens with adequate light to promote healthy growth. Place them near a sunny windowsill, or use artificial grow lights if natural light is limited. LED and fluorescent grow lights are energy-efficient and can provide the right spectrum for optimal photosynthesis (see Sunblaster LEDs or the T5 Combo Neon).

Maintain Proper Air Circulation

Good airflow is crucial for preventing diseases and ensuring strong plant development. Use a small fan to provide consistent air circulation. Choose a dome with small ventilation holes for better air exchange. Space the seeds out and avoid overcrowding trays to allow air to circulate freely.

Water Correctly

Once your growing medium and seeds are ready, it's time to water the microgreens. Water them gently from the bottom to prevent disturbing the delicate seeds and young plants. If watering from above, use a spray bottle or a fine mist nozzle to ensure even watering without over saturating the growing medium. While microgreens can grow successfully without additional fertilizers, incorporating a mild and balanced fertilizer can enhance their growth and nutritional value. Dilute a gentle, water-soluble fertilizer according to the package instructions, and apply it sparingly to avoid over-fertilization. Monitor the plant's response and adjust the fertilizer concentration as needed.

Monitor Temperature and Humidity

Microgreens prefer moderate temperatures and humidity levels. Aim for a temperature range of 65-75°F (18-24°C) during the day and slightly cooler at night. Maintain humidity levels between 50-60% by using a humidifier or covering trays with a clear plastic dome. 

Practice Proper Sanitation

Maintaining a clean and sanitized environment is crucial for preventing diseases and pests. Start with sterilized trays and equipment, wash your hands before handling seeds or plants, and regularly clean trays and tools with a mild bleach solution. Hydrogen peroxide can be used as an effective sterilizing agent.

Understand Harvesting Timing

As your microgreens grow, it's important to know when to harvest them. Microgreens are typically ready for harvest within 7-14 days after sowing, depending on the variety. Harvest when the first true leaves appear, usually at a height of 1-3 inches. Use sharp scissors or a clean knife to cut the microgreens just above the soil line.

Store and Consume Freshly

Microgreens are best consumed fresh for maximum flavor and nutritional benefits. However, if you have an excess harvest, store them in airtight containers lined with paper towels in the refrigerator. Consume within a few days to preserve their quality.

Experiment with Flavor Combinations

One of the exciting aspects of growing microgreens is their vast array of flavors. Experiment with different combinations to elevate your dishes. Pair spicy radish microgreens with milder greens, or add the refreshing taste of basil microgreens to your favorite pasta dishes.

Growing microgreens is a rewarding and accessible way to add a burst of freshness and nutrition to your meals. By following this step-by-step guide, you'll be well-equipped to embark on your microgreen-growing journey. Remember to choose quality seeds, prepare the growing medium, provide proper lighting and airflow, and maintain optimal moisture levels. With a little patience and care, you'll be harvesting vibrant and flavorful microgreens in no time.

Our team at Hydrodionne is always ready to assist you with product recommendations or provide expert advice on growing microgreens. Feel free to reach out to us with any questions or concerns you may have. Happy growing!