Growing microgreens is a fascinating and rewarding task that allows even kitchen garden novices to produce their own fresh and highly nutritious food. One common image associated with growing microgreens is small trays of soil sprinkled with seeds, which are dutifully watered and lovingly cared for until they sprout. However, did you know it’s possible to cultivate robust and flavorsome microgreens without using soil? Hydroponics, a method of growing plants without soil, replaces traditional substrates with water enriched with essential plant nutrients. This article will meticulously analyze how to grow microgreens hydroponically.
Understanding Hydroponics for Microgreens
Hydroponics is a subsection of hydroculture where you grow plants without soil. Instead of the typical scenario where plant roots anchor into the earth in search of nutrients, the core concept of hydroponics revolves around providing a nutrient-rich water solution, directly to the roots. The nutrients typically come in the form of a water-soluble solution that can be easily absorbed by the plant. This makes nutrient delivery more efficient when compared to the conventional soil-based approach.
Selecting Microgreen Seeds
Before planting, it’s essential to choose the right microgreen seeds. The seeds selected should be untreated, disease-free, and suitable for hydroponic cultivation. Among the easiest microgreens to grow hydroponically are broccoli, kale, arugula, and radishes. These varieties are not only high-yielding but also have a quick growth cycle.
Choosing the Right Hydroponic System
There are several different hydroponic systems, but the best for growing microgreens are the wick system and the deep water culture. The wick system is a passive system that does not require electricity. Its simplicity makes it ideal for beginners. However, it might not be the best system for large-scale microgreen cultivation. On the other hand, deep water culture is an active system that requires electricity. It provides a consistent supply of nutrients and oxygen, ensuring fast and abundant growth.
Creating a Nutrient Solution
To grow healthy and robust microgreens, it’s essential to prepare a nutrient-rich water solution. There are numerous pre-mixed hydroponic solutions available on the market, designed to cater specifically to the needs of hydroponic plants. These ready-made solutions contain all the necessary macro and micronutrients that the plant requires.
If you prefer to prepare your own solution, remember that microgreens need Nitrogen (N), Phosphorus (P), and Potassium (K), which are the primary macro-nutrients. Secondary macro-nutrients required are Magnesium (Mg), Calcium (Ca), and Sulfur (S). Lastly, micro-nutrients or trace minerals needed are Iron (Fe), Manganese (Mn), Boron (B), Molybdenum (Mo), Zinc (Zn), and Copper (Cu).
Starting the Planting Process
To start the planting process, begin by spreading the seeds evenly across the growing pad or tray lined with a hydroponic growth medium such as coconut coir or a biostrate felt mat. These seed starting mats work efficiently for growing microgreens because they hold and evenly distribute the moisture while offering a stable environment for root development. After spreading the seeds, mist them thoroughly using a spray bottle filled with the nutrient solution until the mat or pad becomes thoroughly moist.
Observing Growth Cycles
After seeding, the mat should be placed in a dark, warm location to support germination. The temperature should ideally be maintained at around 70-75 degrees Fahrenheit. While the seeds germinate, it’s essential to maintain the moisture level of the mat but take care not to flood it. Depending on the microgreen variety, within 3-7 days, the seeds will germinate and start to grow.
Harvesting Your Microgreens
Microgreens can be harvested when the first set of true leaves appears, typically within 10-14 days of planting. To harvest, simply cut the microgreens just above the mat with a sharp pair of kitchen scissors. Remember to rinse them before use. Microgreens are best eaten fresh but can be stored in the refrigerator for a week if necessary.
Benefits and Drawbacks of Soilless Microgreen Cultivation
Growing microgreens without soil can provide several benefits. It saves space, as the compact system does not require large garden areas. It’s also cleaner, eliminating the mess and potential pests associated with soil. Hydroponic systems can be automated, reducing the time spent on plant care. Additionally, soilless cultivation can offer a higher yield and faster growth.
However, there are also drawbacks to consider. The initial setup cost can be higher due to the need for materials like mats and hydroponic solutions. An electricity outage could potentially disrupt the system and harm your plants. Also, maintaining the right water chemistry can require some learning and testing.
Growing microgreens can be an easy entry point into the hydroponics world. Soilless cultivation is a fantastic technique for those living in apartments or homes with limited garden space. Not only can you get a rapid yield of highly nutritious microgreens, but you also gain the satisfaction of producing your own food. As urban farming continues to gain popularity, hydroponic microgreen cultivation might just be the perfect fit for your home or even a small-scale commercial setup.
