This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases. If you click a link and make a purchase, I may receive a small commission at no extra cost to you.
You can grow a big basil plant by focusing on a few key things: the right soil, plenty of sunlight, and a consistent pruning routine.
If you’ve been wondering how to grow a big basil plant and you’re tired of those tiny, spindly supermarket herbs, you’re in the right place.
I’m going to walk you through exactly how to grow a big basil plant that’s bushy, fragrant, and ready for your best pesto.
In this post, we’ll cover the best way to grow a big basil plant, the common mistakes that keep basil small, and the secret to harvesting so it keeps exploding with new leaves.
Let’s dig in because growing a big basil plant is totally doable, even if you’ve failed before.
Why You Want To Grow A Big Basil Plant
The whole point of learning how to grow a big basil plant is to get more fresh leaves without buying a new pot every week.
A big basil plant gives you a constant supply of aromatic leaves for salads, pasta, and teas.
The good news is that basil is naturally a vigorous grower, so when you grow a big basil plant, you’re really just removing the obstacles that keep it small.
Let’s look at the specific reasons basil stays tiny so you can avoid them.
1. Basil Needs Six Plus Hours Of Sun
When you grow a big basil plant, sunlight is the biggest factor you can control.
Basil is a sun worshipper, and it will not reach its full potential in low light.
If you want to grow a big basil plant indoors by a window, make sure it’s a south-facing one that gets at least six hours of direct sun.
If you’re growing outside, pick the sunniest spot you have, because basil that’s shaded will stretch out, get leggy, and produce tiny leaves.
It’s also smart to rotate your pot a quarter turn every few days so every side gets equal light when you grow a big basil plant indoors.
2. Water Consistently But Don’t Drown It
Basil likes its soil to be consistently moist, but never soggy.
If you want to grow a big basil plant, water it deeply when the top inch of soil feels dry to the touch.
A common mistake is watering a little bit every day, which only wets the surface and encourages shallow roots.
Instead, water thoroughly until you see a little drainage out the bottom, then wait until the top dries again.
This deep watering routine is exactly how to grow a big basil plant with a strong root system that can support large leaves.
3. Feeding Your Basil Keeps It Big
Basil is a hungry plant, and if you want to grow a big basil plant, you need to feed it regularly.
Use a balanced liquid fertilizer diluted to half strength about every two to three weeks.
You can also mix some compost into the top layer of soil when you first plant it.
The right nutrients are the hidden secret behind how to grow a big basil plant that looks like a small shrub.
If your basil leaves are pale yellow-green, that’s a hunger signal, so don’t ignore it.
The Pruning Secret To Grow A Big Basil Plant
If you only take one thing away from this post, let it be this: pruning is how you grow a big basil plant.
Most people pinch off individual leaves, which actually signals the plant to grow taller and more spindly.
Instead, you need to cut above a pair of leaves where you see small new shoots forming.
This is the single most effective technique to grow a big basil plant.
1. Pinch Off Flower Buds The Moment You See Them
Basil’s natural goal is to flower and produce seeds, but flowering stops leaf production.
To grow a big basil plant, you must pinch off every flower bud you see.
This redirects the plant’s energy back into producing more leaves instead of seeds.
Check your basil every few days because those little flower spikes appear fast.
If you let them bloom, your basil will turn bitter, and you certainly won’t grow a big basil plant.
2. Cut Stems, Not Just Leaves
When you want to grow a big basil plant, always harvest by cutting the stem just above a node.
A node is that spot where two leaves grow out from the stem.
When you cut right above it, the plant sends out two new branches from that spot.
This is how one stem becomes two, and two becomes four.
Within a few weeks of this method, you’ll grow a big basil plant that’s wide and bushy rather than tall and sparse.
3. Start Pinching Early
You don’t have to wait until your basil is big to start shaping it.
As soon as your plant has about four to six sets of true leaves, pinch the top two leaves off.
This early trim forces the plant to branch out low, which is exactly how to grow a big basil plant from day one.
Don’t be scared to pinch, because basil recovers fast and rewards your boldness with more growth.
Potting And Soil To Grow A Big Basil Plant
The container and soil you choose play a huge role in how big your basil plant gets.
If your basil is in a small pot, its roots will soon hit the walls and stop growing.
Rootbound basil is a sure way to keep your plant small and stressed.
1. Pick A Big Enough Pot
To grow a big basil plant, choose a pot that’s at least eight to ten inches in diameter.
Give each basil plant its own pot, because overcrowding roots is a common mistake.
A bigger pot means more room for roots, and more roots mean more leaves above ground.
You can even grow a big basil plant in a five-gallon bucket with drainage holes drilled in the bottom.
2. Use Well-Draining Soil
Basil hates wet feet, so use a high-quality potting mix that includes perlite or vermiculite.
These ingredients keep the soil airy and prevent water from pooling.
When you grow a big basil plant in heavy garden soil, it often leads to root rot.
Stick with a light, fast-draining mix if you want to reliably grow a big basil plant.
Also, add a little organic compost to that soil for slow-release nutrition.
3. Don’t Forget Drainage Holes
It might seem obvious, but a pot without drainage holes is a death sentence for basil.
When water can’t escape, it sits at the roots and causes rot.
Your goal to grow a big basil plant requires that excess water can always flow out freely.
If you love a decorative cachepot without holes, just plant your basil in a nursery pot inside it.
This way you can water freely and then dump the runoff from the outer pot.
Common Mistakes That Keep Basil Small
Let’s quickly review the biggest mistakes that stop you from growing a big basil plant.
Many of these are easy to fix, but they’re also easy to overlook.
1. Harvesting Too Many Leaves At Once
When you strip your basil bare, the plant goes into shock.
Never remove more than a third of the plant’s leaves at one time.
Instead, take a few stems from different parts of the plant.
This balanced approach is how to grow a big basil plant consistently over months.
2. Watering At Night
Basil leaves stay wet all night, which invites fungal diseases like mildew.
Water in the morning so the leaves have time to dry in the sun.
Healthy foliage is essential when you grow a big basil plant.
Wet leaves also attract pests, which can slow growth dramatically.
3. Letting It Get Too Cold
Basil is a tropical plant, so it hates cold drafts and temperatures below 50°F (10°C).
If you want to grow a big basil plant outside, wait until all frost danger has passed.
Inside, keep it away from air conditioners and leaky windows.
A warm, consistent temperature above 65°F is ideal.
So, How Do You Grow A Big Basil Plant?
You can grow a big basil plant by giving it full sun, consistent moisture, regular feeding, and aggressive pruning.
It’s not about luck or having a magic green thumb.
It’s about the right environment and the confidence to pinch and cut.
Once you master the pruning technique, you’ll be shocked at how fast your basil fills out.
Remember to always cut above a node, never let flowers stay, and keep the soil moist but not wet.
If you follow these steps, you’ll grow a big basil plant that looks like a mini tree and smells incredible.
Don’t be afraid to experiment with different varieties either, because sweet basil and Genovese basil both respond beautifully to this care routine.
You’ve got everything you need to grow a big basil plant from now on, so grab a pot, some soil, and a sunny window.
Your future harvests of giant, fragrant leaves are just a few weeks away.
Now get out there and grow a big basil plant you can be genuinely proud of.