Small indoor garden: how many growing spots do you really need?

Three, six, twelve, fourteen… when comparing indoor gardens, the number of growing spots is often highlighted as if it were the main criterion.

Yet, more spots do not necessarily mean more harvests. It all depends on the plants you want to grow, their adult size, the available light, and how long they will stay in the system.

A well-sized small garden with four suitable crops can be more pleasant to use than a large model filled with plants that crowd each other. Here is how to estimate the right number of spots for your actual needs.

What does a growing spot really mean?

A growing spot is the space provided to hold a growing basket, a hydroponic sponge, or another support compatible with the system.

But this spot only represents the starting point for the plant. A few weeks later, its foliage can extend far beyond the basket, and its roots can occupy a large part of the reservoir.

This is why the number of spots should never be interpreted as the guaranteed number of adult plants you can grow simultaneously.

A basket is a starting place, not a complete growing area.

Why six spots do not mean six adult plants?

Imagine a system with six spots.

With six compact young lettuces, the arrangement can be coherent if the system and lighting are designed for this density. But with six tomato plants, the situation changes completely: the foliage becomes much larger, the roots stay in place for a long time, and the light must reach higher and denser vegetation.

The same reasoning applies to basil. A young basil plant takes up very little space at the time of sowing, then branches out quickly if you let it grow for several weeks.

Before filling all the baskets, therefore, look at the plant that each seed is destined to become.

How many spots to grow mainly herbs?

For basil, parsley, chives, coriander, or other herbs, a small format can already cover many uses in the kitchen.

For one person or a couple, three to six well-used spots can be enough to keep several herbs close at hand, especially if you harvest regularly.

For example:

• 1 basil spot;
• 1 parsley spot;
• 1 chives spot;
• 1 coriander or other herb spot;
• 1 or 2 free spots to alternate sowings.

Leaving a spot empty is not a failure. It can make it easier to access light, prevent leaves from overlapping too quickly, and allow you to start a new crop while another matures.

And what about lettuces and leafy greens?

Lettuces, arugula, baby leaves, and certain brassicas lend themselves well to home hydroponics because they remain relatively compact and are harvested without waiting for a fruit to form.

A system with several spots can therefore be used more densely with this type of crop than with tomatoes or cucumbers.

But again, variety matters. An adult loose-leaf lettuce does not occupy the same width as a young cut-and-come-again lettuce.

We recommend starting with a little margin, then adjusting the density after observing the actual size of your varieties.

Should you leave empty spots in a small indoor garden?

Yes, sometimes.

Systematically filling all the spots may seem more profitable, but it can create unnecessary competition for light and make maintenance more difficult.

An empty space can serve to:

• allow more light to reach neighboring plants;
• prevent a basil or lettuce from overflowing onto several crops;
• stagger sowings so you don't harvest everything on the same day;
• keep a space available for a new germination sponge;
• make it easier to access the reservoir or certain baskets.

This logic is particularly useful in small systems where a few extra centimeters of foliage quickly change the overall balance.

How many spots for a tomato, a chili pepper, or a strawberry?

Fruiting plants require more caution.

A dwarf tomato, a compact chili pepper, or a strawberry can be grown in a suitable system, but they generally stay in place longer and require more light than a salad.

A single fruiting plant can therefore use the light space of several neighboring baskets.

If you want to grow this type of plant in a small indoor garden, we recommend thinking in terms of available volume around the plant, and not just the number of holes in the lid.

Also keep in mind that some fruiting plants may require pollination assistance when kept entirely indoors.

How to know if the plants are too crowded?

Several signs show that your density is too high:

• the leaves of neighboring plants overlap heavily;
• the larger plants deprive the smaller ones of light;
• you have trouble accessing the baskets without bending or breaking stems;
• humidity remains high in very dense foliage;
• the roots occupy walkways or become difficult to inspect;
• you have to prune constantly simply so that the plants fit in the system.

Regular pruning can be normal for some herbs. On the other hand, if you have to cut continuously solely to prevent the plants from choking each other, the density is probably too high.

Should the number of spots depend on the number of people in the house?

Yes, but not strictly proportionally.

A family of four does not necessarily consume four times more basil than one person. It all depends on your cooking habits.

Ask yourself these questions instead:

• which plants do you actually use every week?
• do you want a few fresh herbs or real salad harvests?
• do you want to vary the species a lot or grow several identical plants?
• are you ready to regularly start new sowings?
• do you have enough space and light for a larger device?

These answers will help you more than a simple ratio of "X spots per person".

Why can staggered sowings reduce the number of spots needed?

In indoor hydroponics, you are not obliged to sow everything on the same day.

A simple strategy is to produce small quantities regularly. For example, instead of starting six lettuces at the same time and then having to harvest everything a few days apart, you can start one or two new crops at regular intervals.

This allows you to spread out the harvests and use the same spot several times throughout the year.

A relatively compact system can therefore produce regularly if you organize the sowings over time.

Does a large number of spots require more maintenance?

Often, yes.

More plants generally mean more foliage to monitor, more roots in the reservoir, more water consumption, and potentially more pruning or harvesting.

The system does not necessarily become complicated, but the maintenance load increases with the amount of vegetation.

A hydroponic garden is never completely autonomous: even with a large reservoir, you need to monitor the water level, add hydroponic nutrients according to the recommendations, clean certain parts, and check the condition of the plants.

Should you choose the largest model possible?

Not necessarily.

A large model can be relevant if you have space, a regular consumption of leafy greens, and the desire to manage more crops.

But if your goal is mainly to have basil, parsley, and a few salads in a small kitchen, a compact format may make more sense.

Before buying, measure the place where you want to install your garden, then look at the adult size of the planned plants. Our guide on compact varieties for indoor gardens can help you anticipate the space really needed.

What other criteria to look at beyond the number of spots?

The number of baskets is just one feature among others.

Also look at:

• the size of the reservoir;
• the space between the spots;
• the available height for the plants;
• the presence and possible adjustment of the lighting;
• the ease of access to the reservoir;
• the stability of the system;
• the availability of compatible baskets and sponges.

You can choose your own seeds, but always make sure that your hydroponic sponges and growing baskets match the system.

How to estimate the right number of spots before buying?

A simple method is to make a list of your priority crops.

Imagine you want to grow:

• basil;
• parsley;
• chives;
• two small lettuces.

You already have five possible crops. But this does not mean that a five-spot system will automatically be ideal: basil can take up more width, while lettuces may require a little space between them.

A slightly larger system can then offer a considerable margin. Conversely, if you only want two herbs, a large reservoir and many baskets are likely to be useless.

Small indoor garden: what number to choose to start?

For a beginner, we generally recommend prioritizing a number of spots consistent with three to six actually used crops, rather than immediately aiming for the maximum.

This range already allows you to vary the herbs, add one or two lettuces, and understand how hydroponic growing works without turning the kitchen into a small greenhouse.

You can then choose a larger system if your needs evolve.

To compare the available formats, consult the Belverdia hydroponic garden collection and especially look at the footprint, height, and organization of the spots.

To remember: count the adult plants, not the holes

The right number of spots is not the one that seems most impressive on a product sheet.

It depends on what you really want to grow.

For herbs and compact lettuces, a few spots can already be enough to create a small garden useful for everyday life. For fruiting crops or large plants, plan more space around each basket.

Start with a reasonable density, leave some margins, and observe your plants. You will often get better harvests with fewer well-established crops than with a system filled to the maximum.