- Understanding Microgreens
Microgreens are young vegetable greens harvested just after the cotyledon leaves have developed. They range in size from 1 to 3 inches, including the stem and leaves. While sprouting takes around 5-7 days, microgreens need 1-3 weeks to achieve their full growth. They are gaining popularity due to their nutritional benefits and ease of growth at home.
- Choosing the Right Seed
When choosing microgreen seeds, you should consider the taste, growth rate, and care requirements. Popular choices include radish, collard, kale, chard, spinach, lettuce, mustard, and arugula. Some seeds, like spinach and beet, have harder shells and may need soaking before planting. Radish, kale, and lettuce seeds grow quickly and are preferable for beginners. However, remember to choose non-GMO and organic seeds for better growth and health benefits.
- Ideal Growing Medium
The growth medium for your microgreens is integral to their overall health and taste. Coconut coir, perlite, vermiculite, and soilless mix are popular choices for indoor cultivation. They provide excellent water retention and aeration. However, potting soil is the best choice as it’s inexpensive, readily available, and suits most microgreen varieties.
- Proper Sowing Techniques
Densely sow the microgreen seeds, leaving minimal space between them. This ensures high yield in a small tray. Cover the seeds with another layer of soil and gently mist them with water. Avoid covering the pots or trays; microgreens need ventilation to avoid mold or diseases.
- Correct Watering Methods
Microgreens require a lot of water but be careful not to oversaturate them which can lead to fungal diseases. Misting them with a spray bottle is the best method to ensure they receive sufficient water without becoming overly wet.
- Adequate Light Exposure
While microgreens can grow under indirect light, they’ll grow faster and healthier if they receive 12-16 hours of direct light daily. If enough natural light is unavailable, use LED or fluorescent lights. Position the artificial light source about 4-6 inches above the greens.
- Appropriate Temperature and Humidity
Microgreens grow best in mild temperatures, ranging between 65-75°F. Cooler temperatures can slow down growth while too much heat can lead to wilting. Similarly, maintaining a humidity level of 40-60% helps in successful microgreen cultivation.
- Timely Harvesting
Microgreens are usually ready for harvest when their first true leaves appear, which can take up to 3 weeks. Cut them just above the soil with sharp scissors, avoiding the need to wash them which can reduce their lifespan.
- Regular Rotation of Crops
Rotating crops reduces the risk of pests and diseases besides allowing you to try several varieties. Once you harvest one tray of microgreens, start another variety in a different tray immediately.
- Use of Organic Fertilizer
Give your microgreens a nutrient boost using organic fertilizers. Seaweed extract or fish emulsion are excellent choices. However, use financializers sparingly as microgreens have a short lifecycle and don’t require as much feeding as mature plants.
- Pest Management
Maintain good hygiene, allow ample air circulation, and routinely check for pests. If you notice any, treat the plants with organic, food-safe pesticides immediately.
- Use of Tray Covers or Humidity Domes
Covering trays with a humidity dome after seeding helps maintain temperature and moisture. Remove the coverings once the seeds start to germinate to allow for good airflow and avoid mold growth.
- pH Level Monitoring
Maintain optimal pH levels for enhanced nutrient absorption. The ideal pH for growing microgreens is slightly acidic, between 6.0 and 6.5.
- Professional Growing Trays
Investing in food-grade, BPA-free growing trays will ensure the safe growth of your microgreens. Choose trays with no hole for indoor growth and trays with holes for outdoor growth or if preferred, a hydroponic growth system.
- Reuse and Resowing
After harvesting your microgreens, you can reuse the soil for the next batch. However, remember to remove the roots from the previous crop, refresh the soil by adding compost, and check for any pest before resowing.
Growing microgreens at home is an engaging and rewarding endeavor. By following these top tips, you can maximize your success and regularly harvest fresh microgreens for your meals.
