AnyponicsSystems · By budget
A hydroponic system under $500
$500 sits right at the edge. A complete system, as our engine designs it, with pump, reservoir, nutrients, meter and safety outlet, starts at about $453 in a greenhouse and $562 indoors with a grow light. At that price you get a starter of four or so plants. The better buy is a little more money: $699 grows 40 plants.
How close each setup gets to $500
| Setup | System | Plants | Build cost | Running /mo | Harvest /mo | Payback |
|---|---|---|---|---|---|---|
| Greenhouse 6×8 ft, greens & tomatoes | Drip | 4 | $453 | $3 | 1.2 lb | 5+ years |
| Outdoors 4×8 ft, greens | DWC | 4 | $526* | $3 | 3 heads (1.1 lb) | 5+ years |
| Indoors 4×4 ft, greens | DWC | 4 | $562* | $19 | 3 heads (1.1 lb) | never |
| Indoors 6×8 ft, $700 budget | DWC | 40 | $699 | $30 | 35 heads (11.5 lb) | 5+ years |
| Indoors 6×8 ft, $800 budget | DWC | 69 | $766 | $39 | 60 heads (19.8 lb) | 31 months |
Rows marked * are over budget: the engine couldn't fit a complete design in $500, so it shows the smallest one possible. Greenhouse and outdoor builds include a thermostatic heater for cold nights, which is why free sunlight doesn't make them much cheaper to build. They are far cheaper to run.
Why a little more money buys so much more
Most of a small build is parts that don't scale with plants: the pump, reservoir, nutrients, pH kit, meter, GFCI outlet and, indoors, the light with its timer and hangers (about $190 together). The plants themselves, net pots and seedlings, are under $1.50 a site. So going from about $562 to $699 takes you from a handful of plants to 40, and $766 gets 69.
Where to save, and where not to
- Save: reuse a food-safe storage tote as the reservoir, buy plain PVC from a hardware store rather than a hydro kit, and start from seed instead of buying seedlings.
- Save: buy the light last and start in a bright window or outdoors in summer, if your season allows.
- Don't skimp: the GFCI outlet (water and electricity), a pH meter you trust, and an opaque reservoir. Each prevents the failure that ends most first systems.
Want something that works for under $100? See the Kratky method.