Hydroponics for Beginners - Types of Systems and How to Start
If you've ever wondered why the same plant grows twice as fast at your neighbor's place, the answer might be hydroponics. In hydroponic cultivation, plants receive nutrients directly to their roots through a water solution, without soil in between. The result is faster growth, higher yields, and complete control over nutrition. In this article, we'll explore exactly what hydroponics is, what the main types of systems are, what you need to get started, and why pH and EC are more important here than with any other method.
Why hydroponics leads to faster growth
When grown in soil, plants expend significant energy expanding their roots in search of water and nutrients. In hydroponics, the roots are surrounded by or regularly irrigated with a ready-made nutrient solution – they receive everything they need effortlessly.
This has a direct effect: the energy that would otherwise go into expanding the root system is redirected to leaves, stems, and fruits. Practical results show 20-50% faster vegetative growth compared to soil cultivation under identical light and temperature conditions.
There's another advantage – control. In soil, you never know exactly what nutrients are available and in what concentration. In a hydroponic system, you determine everything – what, how much, and when the plant receives it.
Main types of hydroponic systems
Hydroponics isn't a single method – this term encompasses several different systems, each with different requirements, advantages, and suitable plants.
Ebb & Flow (or Flood & Drain)
This is the most popular system for home growing and the one most beginners start with. It works simply: a timer turns on a pump, which fills the tray with nutrient solution to a certain level. After 15-30 minutes, the solution drains back into the reservoir. The roots alternate between moisture and air – exactly as they should.
NFT (Nutrient Film Technique)
In NFT, a thin film of nutrient solution flows continuously along inclined channels where the roots hang. The root is half in the solution, half in open air. NFT is an extremely water and nutrient-efficient system, but it is more demanding – if the pump stops for even an hour in hot weather, the roots dry out quickly. It is best suited for growing leafy greens, as well as strawberries.
DWC (Deep Water Culture)
In DWC, plants sit in net pots above a reservoir filled with nutrient solution, in which the roots are directly submerged. An air pump provides oxygen to the solution. DWC is perhaps the simplest hydroponic system to start with – a minimal number of moving parts and direct access to nutrients. The limitation is scalability – it works well with fewer plants. It's probably the easiest start in hydroponics.
Drip Irrigation
Thin tubes deliver the solution slowly and evenly directly to the base of each plant. Suitable for larger plants (tomatoes, peppers, cucumbers) and for various substrates – coco coir, expanded clay pellets, perlite, rockwool. Most systems with individual pots and a pump work on this principle.
Systems like Wilma are classic examples of drip/top-feed hydroponics – each pot receives solution individually through tubes, and the excess drains into a common reservoir. Easy to expand, reliable, and suitable for plants with larger root systems.
What you need to get started
A hydroponic system looks complicated from the outside, but the main elements are just a few:
Reservoir - a container for the nutrient solution. It must be opaque – light in the reservoir promotes algae growth, which contaminates the solution and clogs the tubes.
Pump and Timer - the pump moves the solution, the timer determines when and how much. In ebb & flow systems, the timer is critical: a missed watering cycle can leave roots without water for hours. It's good practice to have a spare pump, especially for more serious setups. Good digital timers will retain cycle settings even if batteries run out or the power goes off.
Inert Substrate - expanded clay (LECA), coco coir, rockwool cubes, or perlite. The substrate in hydroponics is not nutritional – it only anchors the root and retains a little moisture. Expanded clay is reusable and is the standard choice for ebb & flow systems.
Nutrient Solution - fertilizers specifically formulated for hydroponics. Important: hydroponic fertilizers are more concentrated and contain more minerals than soil fertilizers, because the substrate adds nothing.
pH and EC meters - mandatory, not optional. We are representatives of high-quality tools from BlueLab and Aqua Master. See the next section why.
pH and EC in hydroponics - essential control
In soil, you have a natural buffer – organic matter and microbial life smooth out extremes. In hydroponics, you have none of that. Plants are entirely dependent on the parameters of the solution, and if the pH is out of range, they cannot absorb nutrients even with a perfectly prepared solution.
pH range for hydroponics: 5.5 - 6.5
At pH above 6.5, iron, manganese, and boron become less available. At pH below 5.5, calcium and magnesium are absorbed with difficulty. The optimal window is 5.8-6.2.
EC (electrical conductivity) measures the concentration of dissolved salts in the solution – i.e., how "strong" it is. Young plants need a lower EC (0.8-1.2 mS/cm), plants in active vegetative growth – 1.5-2.2, in generative phase – 1.8-2.5. Too high an EC burns the roots; too low, the plant starves.
Check pH and EC with each watering or at least once daily. Solutions change over time – water evaporates and concentration increases, or plants absorb specific elements and the balance shifts.
Practical tips for starting in hydroponics
Start with fewer plants. Four plants in a Wilma system is an ideal start – you can monitor each plant carefully, make corrections, and learn without risking an entire season.
Change the solution every 7-10 days. Old solution accumulates unabsorbed salts and its pH destabilizes. Fresh solution maintains even nutrition.
Don't rely on "by eye." Without an EC meter, you don't know if the solution is 0.5 or 2.5 – a difference that is critical in hydroponics. Buy a meter before starting the system, not after.
Expanded clay requires preparation. Soak it in pH-neutral water for 24 hours before use and wash it thoroughly – new expanded clay carries dust and manufacturing residues that can disrupt the pH in the solution.
Solution temperature matters. The optimal temperature for the nutrient solution is 18-22°C. At higher temperatures, oxygen solubility decreases and roots suffer. Under cold conditions, nutrient uptake slows down.
Discover hydroponic systems and consumables at Gradinar
If you want to try hydroponics, find everything you need at Gradinar store – systems, fertilizers, substrates, and accessories. Do you have a question about a specific system or how to get started? Contact us – we'll help you set up the right installation for your conditions and plants.
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