Your Cool Home is supported by its readers. Please assume all links are affiliate links. If you purchase something from one of our links, we make a small commission from Amazon. Thank you!
Basil plants can get anywhere from 12 to 24 inches tall in a typical garden.
But depending on the variety you choose, those basil plants can get even taller, sometimes reaching up to 36 inches or more.
If you’ve been wondering just how tall do basil plants get before you plant them, the answer really depends on the type, your climate, and how often you pinch those leaves back.
In this post, we’ll dig into the different heights you can expect, the factors that influence how tall basil plants get, and simple tricks to keep them at the perfect size for your garden.
Let’s talk basil and get you growing like a pro.
How Tall Do Basil Plants Get by Variety
The first thing to know is that not all basil grows the same, so when you ask how tall do basil plants get, you have to look at the specific cultivar you’re growing.
Some stay short and bushy, while others shoot up like little green towers.
Here’s a breakdown of common types and their typical heights.
1. Sweet Basil (Genovese)
Sweet basil is the classic pesto variety, and it usually grows to about 18 to 24 inches tall.
In rich soil with plenty of sun, sweet basil plants can get even closer to the 24-inch mark.
If you let them flower, the central stalk will stretch a bit taller, but we’ll talk about why you should avoid that later.
2. Thai Basil
Thai basil is a bit more upright and can easily reach 18 to 24 inches as well.
Under ideal conditions, Thai basil plants can get up to 30 inches, especially in warm, humid climates.
Their purple stems and spicy flavor make them a favorite, and they don’t mind growing a little taller than their sweet cousins.
3. Greek Basil (Bush Basil)
Greek basil is the compact one, and it typically stays around 8 to 12 inches tall.
When gardeners want to know how tall do basil plants get if you want a small pot, Greek basil is the answer.
It forms a tidy little mound, so you won’t see it towering over your other herbs.
4. Lemon Basil
Lemon basil is another medium-sized grower, usually landing between 16 and 20 inches.
It can get taller if you let it go to seed, but regular harvesting keeps it in that compact range.
5. Holy Basil (Tulsi)
Holy basil is the tall one in the family, often reaching 24 to 30 inches.
In some cases, holy basil plants can get up to 36 inches tall, especially if they have plenty of room to spread.
So if you’re asking how tall do basil plants get at their maximum, holy basil is your best bet for height.
Factors That Affect How Tall Basil Plants Get
Even within the same variety, a few key elements will determine how tall basil plants get in your garden.
It’s not just genetics, it’s also how you treat them.
Let’s break down the biggest influences.
1. Sunlight and Warmth
Basil is a sun worshipper, and the more direct light it gets, the more it grows upward.
At least 6 to 8 hours of full sun encourages basil plants to get taller and fuller.
In shady spots, basil tends to stay shorter but also becomes leggy and weak.
So if you want maximum height, give them the sunniest real estate you have.
2. Soil Quality and Water
Rich, well-draining soil with plenty of organic matter helps basil plants get as tall as they possibly can.
Consistent moisture is key, but you don’want soggy roots.
When basil gets regular water and nutrients, it grows steadily upward rather than stalling.
A balanced fertilizer every few weeks can push those basil plants to get even taller.
3. Pruning and Pinching
Here’s the twist, the more you pinch, the shorter your basil stays.
When you remove the top set of leaves, the plant stops stretching up and instead pushes out side shoots.
So if you let basil grow without any trimming, it will get tall and then flower quickly.
But if you pinch regularly, you’ll get a bushy plant that stays on the shorter side.
The choice is yours: do you want a tall basil plant or a wide one?
4. Container vs. Ground Planting
Basil plants in the ground usually get taller because roots can spread freely.
In containers, they’re often root-bound, which limits how tall basil plants get.
A potted basil may top out at 12 to 18 inches, while the same variety in garden soil might reach 24 inches.
If you’re growing in pots, choose a larger container if you want more height.
When Basil Plants Get Too Tall, What Happens?
Sometimes you might notice your basil shooting up quickly, and that’s not always a good thing.
When basil gets tall fast, it often means it’s about to flower, and that changes the flavor.
Let’s look at why that matters and how to manage it.
1. Flowering Stops Leaf Production
Once basil sends up a tall flower stalk, the plant’s energy goes into making seeds.
Leaf growth slows way down, and the existing leaves can turn bitter.
So even though the plant looks tall, it’s not ideal for harvesting.
To keep your basil tasty, you’ll want to pinch those flower buds as soon as they appear.
2. Leggy Growth Means Less Flavor
Tall, leggy basil with long gaps between leaves is a sign that it’s not getting enough light.
The plant stretches to find the sun, but you end up with fewer leaves per stem.
That’s not the kind of tall growth you want.
Instead, aim for short, dense basil that’s packed with leaves.
3. Staking Might Be Needed
If your basil plants get to 24 inches or taller, the stems might get top-heavy.
A gentle stake or even a tomato cage can help keep them upright in windy spots.
This is especially important for holy basil, which can get quite tall and flop over.
Tips to Control How Tall Basil Plants Get
If you want to manage the height of your basil, there are a few easy habits to adopt.
Here’s how to keep your plants at the perfect size for your space.
1. Pinch Early and Often
Start pinching your basil when it’s about 6 inches tall.
Remove the top two sets of leaves, cutting just above a pair of lower leaves.
This encourages branching and keeps the plant shorter and bushier.
Do this every couple of weeks, and you’ll control how tall basil plants get easily.
2. Use a Wide, Shallow Pot
If you’re container growing, choose a pot that’s wider than it is deep.
This encourages lateral growth rather than upward growth.
A 12-inch wide pot is perfect for keeping basil compact and productive.
3. Harvest from the Top
When you harvest basil, always cut from the top down.
Never pick just the bottom leaves, as that forces the plant to keep stretching upward.
By harvesting the top growth, you’re naturally keeping the plant shorter.
It’s a simple trick that makes a big difference in how tall basil plants get.
So, How Tall Do Basil Plants Get?
Basil plants get as tall as the variety and conditions allow, which is typically 12 to 24 inches for most garden types.
Some varieties like holy basil can grow to 30 or even 36 inches if left to their own devices.
Meanwhile, Greek basil stays petite at under a foot.
The real answer to how tall do basil plants get is up to you, your pruning habits, and your growing environment.
If you give basil plenty of sun, water, and rich soil, you’ll see steady growth within that range.
And if you prefer a bushier plant that’s easier to harvest, just keep pinching those top leaves.
So now you know exactly what to expect when you plant basil.
Whether you want a tall statement plant or a compact little bush, you have all the control.
Happy growing, and enjoy your fresh basil.