Wick systems are by and large the most simple and easiest to set up because there are no moving parts. The system contains a reservoir filled with water and nutrients and above it, a container filled with growing medium. The two containers are connected by a wick, which draws the nutrient-filled water up into the growing medium where it is happily absorbed by your plants. This system is great for learning the basics, but may not work well with large or water-hungry plants such as lettuce, because the wick cannot supply water fast enough. This system works extremely well with micro greens, herbs, and peppers.
It is another extremely simple system to set up. In this system, the plants are placed into a Styrofoam platform that sits right on top of the reservoir. An air pump is added to the reservoir to deliver oxygen to the roots. This system is ideally suited for water-hungry plants, but not for more long-term plants such as tomatoes.
Ebb & Flow
Ebb & Flow systems are slightly more complex but are extremely versatile. This system works by flooding the growing medium with a solution and then draining it back into the reservoir. To do this, you need a submersible pump with a timer. One of the greatest advantages of ebb & flow is that you can use the timer to customize your plants’ watering schedule based on the plant size, number of plants, temperature, humidity, etc.
You also have the option of potting plants individually for easy customization or filling the entire tray with growing medium and planting directly in the tray.
Choosing What to Grow
Just about any plant can be grown hydroponically, but for beginners, it is best to start small. The best choices are herbs and vegetables that grow quickly, require little maintenance, and do not have a huge variety of nutrient needs. You want fast-growing plants so that you can assess how well your system works and tweak it as necessary. It would be a real letdown to wait months until harvest time only to find out your system is not working properly. Maintenance-free plants are great for beginners because they allow you to focus on learning about your system- you can move on to more complex veggies later. If you are growing a variety of plants, it is also important to make sure that they are similar in their nutrient requirements, so that they grow well together.