How to grow basil indoors all year round?

A few leaves on tomatoes. A handful in your pasta. Pesto prepared at the last minute.

Basil is one of those herbs that you always wish you had on hand.

Good news: it is also one of the most interesting plants to start with for indoor gardening.

No need for a vegetable garden, a balcony, or years of experience. But like all plants, basil has a few requirements. And in an apartment, one in particular makes all the difference: light.

Why basil is ideal for beginners

Basil grows relatively quickly, is easy to sow, and can be harvested regularly. The University of Illinois indicates that it can be easily grown from seeds and that a first indoor harvest can begin about 4 to 5 weeks after sowing, when conditions are favorable.

That is precisely what makes it a good first crop.

Unlike a tomato or a strawberry, you don't wait for flowering and then fruit formation to enjoy your plant. It is its leaves that you harvest directly.

The cycle from seed to plate is therefore relatively short.

And when it grows in your kitchen, basil has another fairly obvious advantage: you harvest only what you need.

No more need to buy a whole bunch just to use six leaves.

Light: the real secret to beautiful basil

Basil loves light.

A lot of it.

A very bright window may be enough during certain times of the year. But in autumn or winter, the intensity available behind a window drops significantly.

That is often when basil starts to produce long, thin stems and leaves that are increasingly spaced out.

This is not necessarily a water or nutrient problem.

It is simply looking for more light.

The University of Minnesota recommends plenty of bright light to maintain basil indoors and notes that artificial lighting may become necessary during darker months, notably with about 10 to 12 hours of daily lighting under the conditions they describe.

This is where an indoor garden with horticultural lighting makes perfect sense: above all, it makes the light much more consistent, regardless of the weather or the orientation of your apartment.

From seed to first leaves

You can perfectly start your basil from seeds.

In a classic pot, they are sown in a moist substrate. In a hydroponic system, they can be placed in a small germination sponge that serves as support for the first roots.

In both cases, the goal is similar: to maintain a humid and sufficiently warm environment during germination.

Basil particularly enjoys warmth. The University of Illinois indicates that its seeds generally germinate well when the environment reaches about 21°C (70°F) or more, with germination that can occur in 5 to 7 days under good conditions.

Then, be patient.

The first two small leaves do not necessarily look like the basil you know yet. The characteristic leaves will appear gradually.

And above all, avoid the classic beginner's mistake: wanting to speed up growth by over-tending to it.

A plant grows better in a stable environment than in one that is constantly being adjusted.

The principle is exactly the one presented in the Belverdia guide: light, water, nutrients, and environment must, above all, remain consistent over time.

→ Download the free guide to getting started with gardening 📚🪴

How to get bushier basil?

Here is the most important tip in this article:

Harvest your basil.

This may seem paradoxical. Yet, correctly cutting certain tips encourages the plant to branch out.

Instead of letting a single long stem grow upward, the basil develops more side branches. It gradually becomes denser and more rewarding to harvest.

The University of Illinois specifically recommends pinching the tips of the stems to promote a bushier plant and more leaves.

The right habit is therefore not to systematically pluck a few large leaves while letting the main stem grow indefinitely.

When your plant is sufficiently developed, instead cut a stem tip just above a node, where two leaves meet.

The plant will then be able to grow in several directions.

A small cut. A big effect.

Should you let basil flower?

If your main goal is to harvest leaves, generally no.

When basil starts to produce its flowers, part of its energy is directed toward reproduction and seed formation.

The plant continues to live, but its growth changes. The stems may become woodier and the production of leaves useful for cooking decreases.

The University of Minnesota recommends pruning basil regularly and avoiding letting it go to seed if the goal is to maintain significant leaf production.

Do you see a small flower spike appearing?

Just pinch it off.

If, on the other hand, you wish to observe the flowering or collect seeds, you can obviously let it be. Gardening is also a matter of personal desire.

In soil or hydroponics?

Both work very well.

In a pot, basil is simple to grow, provided you give it enough light and watch the watering. The main pitfall is usually too much or too little water.

In hydroponics, the logic changes slightly.

The roots have direct access to the water and nutrients they need. There is no more soil to water, but you must always keep enough water in the reservoir and provide the appropriate nutrients.

The point is not to turn basil into an "automatic" plant.

It is mainly to make its environment more consistent.

And for an herb that you want to keep right in your kitchen, this consistency is particularly practical.

→ Discover Belverdia hydroponic gardens

Mistakes that result in sad basil

When your basil is growing poorly, there's no need to change everything immediately.

Start by checking four things: is it getting enough light? Is the temperature mild enough? Does it have regular access to water and nutrients? Has it been pruned, or is it just growing into one long stem?

A very elongated basil is often looking for light. Drooping leaves can signal a water problem. Dense but slowing growth can simply indicate that it is time to harvest and prune.

Observe before correcting.

That is probably one of the most useful habits when you start gardening.

Harvesting right before cooking changes everything

Once your basil is established, the best moment arrives.

You are preparing your meal. You cut a few stems. And a few seconds later, they are on your plate.

It is a very different experience from a packet of herbs forgotten at the back of the refrigerator.

And that is precisely the point of a small indoor garden: it does not seek to replace a garden of several dozen square meters.

It simply brings certain crops closer to your daily life.

Basil is probably one of the best examples to start with.

It grows fast, is harvested regularly, and forgives many mistakes.

Then, once you have understood how it reacts to light, pruning, and nutrients, tomatoes, strawberries, and lettuce will already seem much less mysterious.

It's your turn to grow. 🌿