How much does it cost to maintain a hydroponic garden?

How much does it cost to maintain a hydroponic garden?

When thinking about the cost of a hydroponic garden, we first look at the cost of the device itself.

But once it's set up, how much do you really need to budget to keep growing?

The answer depends mainly on four items: seeds, germination sponges, hydroponic nutrients, and electricity. Water, cleaning, and a few accessories complete the routine, but their cost is generally secondary in a small indoor garden.

It is therefore most useful to distinguish between essential consumables and items that are for convenience or optional equipment.

1. Seeds: a cost that varies greatly depending on what you grow

Seeds are the first recurring cost.

But their actual cost per crop depends heavily on the type of seeds, the number of seeds in the packet, and how you sow them.

Lettuce or basil does not require the same investment as a more specific tomato variety.

The important point is above all not to be locked into a proprietary system.

With an open hydroponic garden, you can choose your own seeds, buy your seeds from Belverdia or elsewhere, and adapt your budget to your needs.

You can also keep several varieties at home and only sow what you need.

2. Germination sponges: the consumable to budget for with each new sowing

In most small hydroponic systems, each new plant starts in a germination sponge.

This consumable is generally replaced when a new crop begins.

At the time of writing, Belverdia offers a pack of 50 hydroponic growing sponges for €34.70, or about €0.69 per sponge.

The cost therefore depends mainly on the number of new plantings you actually start.

If you grow herbs that you harvest several times, you do not necessarily replace the sponge every week. The same plant can stay in place for several harvests.

Conversely, if you like to frequently replace your lettuce or test many varieties, you will use more sponges.

3. Growing baskets are not necessarily disposable

The growing basket and the sponge do not have the same role.

The sponge serves as a germination support and generally accompanies the plant during its cycle.

The basket, on the other hand, can often be cleaned and then reused as long as it remains in good condition and compatible with your system.

We therefore recommend distinguishing consumables from reusable parts.

Before buying a new set, simply check the condition of the basket, clean it properly, and replace it only if it is deformed, broken, or has become difficult to clean.

4. Hydroponic nutrients: essential, but their lifespan depends on your usage

Unlike a plant in soil that can draw some of its minerals from the substrate, a hydroponic crop depends on the nutrient solution prepared in the reservoir.

Nutrients are therefore a true consumable.

At the time of writing, Belverdia hydroponic A&B nutrients are listed at €16.70.

But it would be misleading to turn this price into a universal monthly cost.

The lifespan of a bottle depends on the volume of your reservoir, the recommended dosage, the number of refills, and the type of plants grown.

A small setup with a few spots consumes less solution than a large vertical system.

The best calculation is therefore to look at the dosage of the product you use and estimate how many liters of solution you actually prepare in a month.

5. Electricity: often a few euros a month for a small system

An indoor garden equipped with horticultural lighting and a pump consumes electricity.

The lamp is generally the main cost.

On the Verdia One, the announced LED lamp is 20 W. In the usage currently indicated on the product sheet, with about 14 hours of lighting per day and the operation of the pump, Belverdia estimates the total consumption at around 10 kWh per month, or about €2 per month at the French electricity rate used for this estimate.

This figure is not a rule that applies to all systems.

A more powerful device, a different lighting duration, or the addition of an external lamp will obviously change the result.

To understand how to calculate this item at home, see our guide on the electricity consumption of a hydroponic garden.

6. Water: a real cost, but difficult to isolate in the budget

Plants consume water and the reservoir must be topped up regularly.

The quantity depends directly on the size of the plants, the temperature, the volume of the reservoir, and the type of crop.

A young lettuce consumes much less than a large adult tomato plant.

You must also take into account the replenishment of the nutrient solution when your system or your crop requires it.

Rather than looking for a fixed amount, the easiest thing is to monitor for a few weeks the amount of water actually added to your own garden.

7. Cleaning does not necessarily require a collection of specialized products

Regular maintenance also includes cleaning the reservoir, the growing baskets, and the elements in contact with water.

But this does not mean that you need to buy a different product for each operation.

Depending on the system, water, a suitable cleaning between two crops, and the compatible products recommended by the manufacturer are sufficient for routine maintenance.

The goal is not to excessively disinfect an operating installation, but to avoid the accumulation of plant residues, algae, or deposits.

8. Tools are rather one-time purchases

Gardening scissors, a small pitcher, pH measurement, optional EC tester... all this can improve the comfort of growing.

But all these purchases are not necessary from day one.

To start, you can perfectly focus on the essential elements:

• seeds;
• germination sponges;
• compatible baskets;
• hydroponic nutrients;
• water;
• electricity if your system uses a pump or lighting.

The rest can come gradually if your practice becomes more precise.

How much do you need to budget each month?

There is no single monthly amount that is honest for all users.

A small garden containing three herbs maintained for several months does not have the same cost as a system filled with lettuce constantly renewed.

To get your own budget, simply add up:

• the number of sponges used during the month;
• the portion of nutrients consumed;
• the seeds actually sown;
• the electricity consumption of your installation;
• any replaced accessories.

With this method, you get a cost based on your actual usage rather than an average that would not correspond to your garden.

A concrete example of cost logic

Imagine that you keep several herb plants in place for several weeks.

You do not change their sponges every month.

You simply continue to top up the reservoir, add the nutrients at the planned dosage, harvest, and let them grow back.

In this situation, your monthly cost can be relatively low.

Conversely, if you use all the spots to continuously produce young lettuce and frequently start new sowings, the consumption of sponges and seeds will be higher.

The maintenance cost therefore depends much more on your crop renewal rate than on the simple number of spots in your garden.

Can you reduce the cost without complicating the crop?

Yes, especially by avoiding waste.

A few simple habits are enough:

• do not systematically sow several expensive seeds when it is not necessary;
• reuse the growing baskets when they are designed for that and remain in good condition;
• dose the nutrients correctly instead of adding more "just in case";
• take advantage of plants that support several harvests;
• choose your seeds and compatible consumables according to their value for money.

The freedom to choose your consumables is particularly important in the long term.

A system that forces you to constantly buy back a proprietary consumable necessarily limits your ability to adjust your budget.

Is the maintenance cost more important than the purchase price?

Over a short period, no: the price of the device generally remains the main investment.

But over several years, consumables obviously become part of the total cost.

This is why it is useful, before buying, to look at something other than the price displayed on the box:

• are the consumables easily replaceable?
• can you choose your seeds?
• are the baskets reusable?
• are compatible sponges easy to find?
• is the electrical power reasonable for your usage?

If you are still comparing the different formats, you can discover the Belverdia hydroponic gardens and look at the characteristics of each model before choosing.

To remember: what are the real costs of a hydroponic garden?

Once the garden is purchased, the recurring expenses are relatively simple to identify.

Seeds, germination sponges, nutrients, water, and electricity make up the bulk.

The baskets, tools, and accessories are more one-time purchases when they are reusable.

The real cost depends mainly on the number of new plantings you start and the size of your installation.

If you want to control your budget, do not look for a universal figure.

Look at how many plants you actually replace, what quantity of solution you prepare, and how much your device consumes.

This is the simplest way to know what your garden really costs you.