Hydroponics, the science of growing plants without soil, has revolutionized the horticultural industry, and herbs particularly thrive in this highly-controlled environment. The benefits include faster growth, larger yields, and better pest control, which can maximize efficiency while reducing costs for commercial farming.
Growing hydroponic herbs captivates gardeners because of the herbs’ inherent versatility and usefulness. Their aromatic, culinary, and medicinal properties make them an essential part of our daily lives. This activity is also beneficial to those who live in condos or small spaced urban dwellings, where gardening space is often limited.
The following comprehensive guide digs deep into the process of harvesting hydroponic herbs, from set-up and maintenance to performing the actual harvest correctly and efficiently.
Setting Up The Hydroponic System
In beginning, you should start by choosing the right hydroponic system. The six types include the wick system, deep water culture (DWC), nutrient film technique (NFT), ebb and flow (flood and drain), aeroponics, and drip systems. Beginners often opt for wick or DWC systems due to their simplicity.
Next, select an ideal location for your hydroponics setup. It should be somewhere with a stable temperature of 18-28 degrees Celsius, good air circulation, and access to ample light, ideally natural. A solarium or sunroom can be perfect for this purpose.
The third step is to choose the herbs you wish to grow. Suitable herbs for a hydroponic system include basil, parsley, dill, thyme, chives, rosemary, and much more.
Maintaining The Hydroponic System and Plant Health
Provide the proper nutrients that your herbs need. For hydroponics, macronutrients (such as Nitrogen, Phosphorus, and Potassium) and micronutrients (like Iron, Manganese, and Zinc) are dissolved directly into the water.
Lighting should be controlled as well. Most herbs need around 10-12 hours of light but take note, some such as dill, coriander, and tarragon require slightly less.
To foster a good environment, maintain a pH level between 5.5 to 6.5. Test the pH levels frequently as herbs can be sensitive to fluctuations.
Monitor temperature and humidity closely. Herbs prefer a humidity level of 50-70%, and temperature should be consistently maintained around 18-28 degrees Celsius.
The Harvesting Process
One crucial detail in hydroponic herb farming is knowing when to harvest.
For instance, basil is ready for harvest once it reaches around six inches tall, and the leaves are shinny and dark green. Dill plants can be harvested when they reach 8-10 inches tall. Parsley and chives can be harvested when they reach 4-6 inches tall.
Harvest entire plants or portions of the plant, depending on what you need and the particular herb’s growth characteristics.
When you’re ready to harvest, gently hold a stem or leaf in one hand. With the other hand, use a clean pair of garden shears or a knife to cut off the desired section. Be careful not to disturb or damage the roots.
Always prune from the top of the plant to encourage bushier, more robust growth. Most herbs can tolerate heavy harvesting, but it’s a good idea to never remove more than one-third of a plant at a time. After harvesting, you should check the plants’ health, provide essential nutrients, and correct any issues to ensure future robust growth.
Post-Harvest Treatment
To keep your herbs fresh post-harvest, immediately rinse them in cold water to remove any residual nutrient solution and remove wilted or discolored leaves. Then, lightly dry your herbs using a salad spinner or a clean towel.
For storage, place your herbs in the crisper drawer of your refrigerator inside a paper bag or wrapped in a paper towel. This will absorb excess moisture and keep your herbs fresh for up to weeks.
Scaling Up Your Hydroponic Herb Harvesting
Once you’ve mastered the basic elements of hydroponic herb gardening, you may want to scale up your production. Commercial hydroponic herb producers often use advanced systems like NFT or aeroponics, which can support larger, more robust plants and higher yields. They will also need to incorporate more advanced lighting systems such as high-intensity discharge (HID) or light-emitting diode (LED) lights.
Lastly, should you wish to sell your herbs, you’ll need to comply with local regulations. Some areas may require health inspections or specific licensing to sell produce grown hydroponically.
Understanding how to harvest hydroponic herbs is pivotal for both casual home growers and commercial farmers. It’s an intricate process all the way from setting up the system to the point of harvest. However, with a thorough understanding and careful implementation of the points above, you’re on your way to cultivating a thriving hydroponic herb garden.
Whether you’re gardening for personal use or venturing into commercial hydroponics, the world of hydroponic herb gardening offers a delightful and fruitful experience. Enjoy the journey!
