You've probably seen the word "hydroponics" popping up more and more — on TikTok, at the farmers market, maybe even at Bunnings. And you've probably wondered: is this actually something a normal person can do at home? Or is it complicated, expensive, and only for serious gardeners?
The honest answer is that hydroponics is one of the most accessible ways to grow food at home — once someone explains it properly. So that's what this guide is for.
What is hydroponics, in plain English?
Hydroponics is simply growing plants in water instead of soil. That's it. Instead of putting a plant in a pot of dirt and hoping the soil has the right nutrients, you grow the roots directly in water that already has everything the plant needs dissolved into it.
The word sounds technical but the concept is ancient — people have been growing plants in water for thousands of years. The Aztecs grew floating gardens. The Hanging Gardens of Babylon might have been hydroponic. It's only in the last few decades that the home version became genuinely easy and affordable.
Why would I want to grow without soil?
This is the question that actually matters. Here's why Australians are increasingly choosing hydroponics over traditional gardening:
- No garden required. You can grow on a kitchen bench, a balcony, a spare room, or even a windowsill. Apartment dwellers and renters can grow food just as well as someone with a backyard.
- Grows much faster. Hydroponic plants typically grow 30–50% faster than soil-grown plants because their roots have direct access to nutrients. Lettuce that takes 60 days in soil takes 30 days hydroponically.
- Uses less water. Counterintuitively, hydroponics uses significantly less water than soil gardening because water is recirculated through the system rather than soaking into the ground.
- No soil pests or diseases. Soil carries a whole ecosystem of potential problems — root rot, curl grubs, fungal diseases. Remove the soil and most of those problems disappear.
- Year-round growing. Because you control the environment, you can grow fresh herbs and salads in the middle of a Sydney winter or a Brisbane summer without worrying about the weather.
What can I actually grow hydroponically?
Far more than most people realise. The easiest crops for beginners are:
- Lettuce and salad greens — the perfect first crop, ready in 3–4 weeks
- Fresh herbs — basil, mint, parsley, chives, coriander
- Spinach and silverbeet
- Cherry tomatoes — more involved but very achievable
- Strawberries — yes, really
- Chillies and capsicum
If you're just starting out, lettuce and herbs are the smart choice. They grow quickly, they're hard to kill, and there's something deeply satisfying about putting fresh basil in your pasta that you grew yourself on the kitchen bench.
How does a hydroponic system actually work?
At the most basic level, a hydroponic system has three things:
- A reservoir — a container filled with water and dissolved nutrients
- A way to hold the plants — usually net cups filled with an inert growing medium like clay pebbles or rockwool cubes instead of soil
- Nutrients dissolved in the water — a concentrated liquid or powder you mix into the water that contains everything a plant needs to grow
The roots of your plants hang down into the nutrient-rich water and drink up everything they need. You top up the water as it's consumed, and occasionally change it completely to keep things fresh. That's genuinely most of the maintenance.
What about pH — does that matter?
Yes, pH matters — but it's much simpler to manage than most guides make it sound. pH is just a measure of how acidic or alkaline your water is. Most hydroponic plants grow best in a pH between 5.5 and 6.5.
You test it with a cheap pH pen (about $15–30 from most hydroponic suppliers) and adjust it with pH Up or pH Down solution if needed. Once you get the hang of it, the whole process takes about two minutes and you do it maybe once a week.
We have a full guide on pH management for beginners coming soon — but don't let it intimidate you before you even start.
Is it expensive to get started?
It doesn't have to be. You can set up a perfectly functional beginner system for around $50–80 if you source the components yourself. A decent mid-range setup with better equipment runs about $150.
The ongoing cost is mainly nutrients — a good beginner nutrient solution costs around $20–30 and lasts several months for a small home setup.
We've written a full cost breakdown guide with Australian prices if you want the specifics: How much does it cost to start hydroponics in Australia?
So — should I try it?
If you want to eat fresher food, you live in an apartment or have no outdoor space, you've ever killed a supermarket herb plant, or you're just curious about growing something — yes, you should try it.
The learning curve is real but it's not steep. Your first grow will teach you more than any guide can, and the satisfaction of eating something you grew yourself in water on your kitchen bench is genuinely hard to describe until you've done it.