Is Arugula A Type Of Lettuce – The Surprising Truth Behind
Have you ever stood in the produce aisle wondering if that peppery green belongs with the Romaine? You aren’t alone; many gardeners ask is arugula a type of lettuce when planning their spring beds.
In this guide, I will clear up the confusion and show you exactly why this plant is a powerhouse in its own right. We’ll explore its unique family tree and how to grow it successfully at home.
By the end, you will know how to harvest the best leaves and keep your plants thriving all season long. Let’s dive into the world of “rocket” and see what makes it so special!
What's On the Page
- 1 The Botanical Breakdown: Is arugula a type of lettuce?
- 2 Comparing Growth Habits and Life Cycles
- 3 Planting Your Peppery Greens: A Step-by-Step Guide
- 4 Common Challenges and How to Overcome Them
- 5 Choosing the Right Variety for Your Palate
- 6 Harvesting and Storage for Maximum Freshness
- 7 Frequently Asked Questions About Arugula
- 8 Conclusion: Go Forth and Grow!
The Botanical Breakdown: Is arugula a type of lettuce?
To answer the question simply: no, it is not. While they often share the same salad bowl, is arugula a type of lettuce is a question that leads us to two very different plant families.
Lettuce belongs to the Asteraceae family, making it a distant cousin to sunflowers and daisies. Arugula, on the other hand, is a member of the Brassicaceae family.
This means your peppery greens are actually related to broccoli, kale, and Brussels sprouts. Understanding this distinction is the first step to becoming a more informed gardener.
The Science of the Brassicaceae Family
Being a brassica gives this plant certain traits that lettuce simply doesn’t have. These plants contain sulfur compounds called glucosinolates, which provide that signature spicy kick.
These compounds aren’t just for flavor; they act as a natural defense mechanism for the plant. When you bite into a leaf, you are tasting the plant’s way of protecting itself!
In the garden, this relationship means it will face similar pests as your cabbage. If you see tiny holes in the leaves, you’re likely dealing with flea beetles, a classic brassica foe.
Why the Confusion Persists
The confusion usually stems from how we use these greens in the kitchen. Because we eat them raw in salads, we tend to group all leafy greens under the “lettuce” umbrella.
Culinary classification often ignores botanical reality for the sake of convenience. However, knowing is arugula a type of lettuce or a mustard relative helps you manage your crop rotation better.
You wouldn’t want to plant your “rocket” in the same spot where you just grew broccoli. Doing so can lead to a buildup of soil-borne diseases that affect the whole family.
Comparing Growth Habits and Life Cycles
While they might look similar when young, these two plants grow very differently. Lettuce tends to form heads or loose clusters of soft, mild leaves.
Arugula grows in a rosette pattern, with deeply lobed leaves that look like oak leaves or dandelion greens. It is also much faster to reach maturity than most lettuce varieties.
I often tell my friends that if they want a “quick win” in the garden, this is the plant to choose. You can often start harvesting baby leaves in as little as three weeks.
Temperature Preferences and Bolting
Both plants love cool weather, but “rocket” is often the first to bolt when the sun gets hot. Bolting is when the plant sends up a flower stalk and stops producing tasty leaves.
When this happens, the leaves become incredibly bitter and tough. While some people enjoy that intense heat, most find it a bit too much for a standard salad.
To prevent this, I recommend planting in the very early spring or late fall. You can even grow it through the winter in many climates using a simple cold frame or row cover.
Soil and Sunlight Requirements
Both greens enjoy well-draining soil rich in organic matter. However, I’ve found that arugula is a bit more forgiving of poor soil than many fancy lettuce varieties.
It prefers full sun but will happily tolerate partial shade, especially during the warmer months. In fact, giving it some afternoon shade can actually delay bolting and extend your harvest.
Keep the soil consistently moist but not waterlogged. Stress from drought is a primary trigger for the plant to go to seed prematurely, which we want to avoid.
Planting Your Peppery Greens: A Step-by-Step Guide
Now that we’ve settled the debate on is arugula a type of lettuce, let’s get your hands in the dirt. Growing this crop is incredibly rewarding because of its speed and vigor.
I always suggest direct-sowing the seeds rather than buying transplants. The roots are somewhat delicate, and the plant grows so fast that transplanting often causes unnecessary stress.
Follow these steps to ensure a bountiful harvest of spicy, tender greens for your kitchen table.
- Prepare the Bed: Loosen the top 6 inches of soil and mix in some high-quality compost.
- Sow the Seeds: Scatter seeds about 1 inch apart in rows or blocks. You only need to cover them with 1/4 inch of soil.
- Water Gently: Use a fine mist setting on your hose to avoid washing the tiny seeds away.
- Thin the Seedlings: Once they are 2 inches tall, thin them to be 4-6 inches apart. Don’t throw the thinnings away; they are delicious!
- Mulch: Apply a thin layer of straw or dried grass clippings to keep the roots cool and moisture in the soil.
Succession Planting for a Continuous Harvest
Because this plant matures so quickly, if you plant it all at once, you’ll have a massive glut and then nothing. The secret to a long season is succession planting.
I like to sow a small new patch every 10 to 14 days. This ensures that as one patch starts to bolt, the next one is just reaching its prime eating stage.
Stop planting once the daytime temperatures consistently hit 80 degrees Fahrenheit. You can start up again in late summer for a wonderful fall and winter crop.
Container Gardening Tips
If you don’t have a big garden plot, don’t worry! This is one of the best crops for container gardening because of its shallow root system.
A simple window box or a 12-inch pot is plenty of room for a few plants. Just make sure the container has good drainage holes to prevent root rot.
Potted plants dry out faster than garden beds, so check the moisture levels daily. I find that a liquid seaweed fertilizer every two weeks keeps container plants very happy.
Common Challenges and How to Overcome Them
Even though it’s easy to grow, you might run into a few hiccups. Understanding that is arugula a type of lettuce is a myth helps you identify the right solutions for these problems.
Since it’s a brassica, it attracts specific pests that don’t usually bother lettuce. Being prepared for these “uninvited guests” will save your crop from destruction.
Let’s look at the most common issues I see in home gardens and the best ways to handle them naturally.
Dealing with Flea Beetles
Flea beetles are tiny black insects that jump like fleas when disturbed. They chew hundreds of tiny “shotholes” into the leaves, making them look like Swiss cheese.
The best defense is a physical barrier. I highly recommend using a lightweight floating row cover immediately after sowing your seeds to keep the beetles off.
If they are already present, you can use neem oil or insecticidal soap. However, the row cover is much more effective and requires less work in the long run.
Managing Bitterness and Bolting
As I mentioned earlier, heat is the enemy of flavor for this green. If your leaves are becoming too spicy to handle, it’s usually a sign of heat stress.
Try to harvest early in the morning when the leaves are full of moisture. You can also try “blanching” the flavor by watering the plants deeply the night before you harvest.
If the plant has already sent up a tall flower stalk, the leaves are likely past their prime. At this point, I usually let them bloom to attract pollinators to the garden.
Downy Mildew and Fungal Issues
In very wet or humid weather, you might see yellow spots on the tops of leaves with fuzzy growth underneath. This is downy mildew, a common fungal pathogen.
To prevent this, always water at the base of the plant rather than over the leaves. Good airflow is also critical, so don’t crowd your plants too closely together.
If you see infected leaves, remove them immediately and dispose of them in the trash. Do not put diseased foliage in your compost pile, or you’ll spread the spores next year!
Choosing the Right Variety for Your Palate
Not all arugula is created equal! Depending on your taste preferences, you might choose one variety over another for your garden beds.
There are generally two main types: Garden Arugula (Eruca sativa) and Wild Arugula (Diplotaxis tenuifolia). Each has its own unique characteristics.
Understanding these differences helps you decide which one fits your culinary needs best. Some people love the crunch, while others prefer the intense spice.
Garden Arugula (Eruca sativa)
This is the variety you most commonly see in the grocery store. It has broader, rounder leaves and a milder, nutty flavor with just a hint of spice.
It is very fast-growing and produces a lot of biomass quickly. Varieties like “Astro” are bred specifically to be slow-bolting, making them great for beginners.
I find this type is best for large salads where you want the green to be the star. It holds up well to heavier dressings and toppings like nuts and cheese.
Wild Arugula (Sylvetta)
Wild varieties, often sold as “Sylvetta,” have much skinnier, deeply serrated leaves. They grow more slowly but are much more cold-hardy than garden types.
The flavor is significantly more intense—think of it as arugula concentrate! It has a pungent, almost wasabi-like kick that lingers on the tongue.
Because it is so strong, I use it more as a garnish or a seasoning. A few leaves on top of a homemade pizza or a steak can completely transform the dish.
Harvesting and Storage for Maximum Freshness
The way you harvest can actually determine how long your plant continues to produce. I always use the “cut and come again” method for my leafy greens.
Simply use a pair of clean garden snips to cut the outer leaves, leaving the center “heart” of the plant intact. This allows the plant to keep growing from the middle.
Never take more than one-third of the plant’s foliage at a time. This ensures the plant has enough energy to recover and grow more leaves for your next meal.
When to Harvest
For the best flavor, harvest when the leaves are between 2 and 4 inches long. These “baby” leaves are much more tender and have a balanced flavor profile.
Once the leaves get much larger, they can become tough and fibrous. If you wait until the plant starts to flower, the flavor shifts dramatically toward bitter.
I always suggest doing a “taste test” in the garden before you harvest a whole bowl. If it tastes good to you, it’s ready for the kitchen!
Storing Your Greens
Fresh greens wilt quickly once they are cut. To keep them crisp, wash them in cold water and use a salad spinner to get them as dry as possible.
Wrap the dry leaves in a clean paper towel and place them in a reusable silicone bag or a plastic container. Store them in the crisper drawer of your fridge.
Properly stored, they should stay fresh for about 5 to 7 days. If they start to look slimy or smell “off,” it’s time to toss them in the compost bin.
Frequently Asked Questions About Arugula
Is arugula a type of lettuce or a herb?
Technically, it is a vegetable in the mustard family, but many people treat it like a herb because of its strong flavor. In the garden, we treat it as a leafy green vegetable.
Can I eat the flowers?
Yes! The flowers are completely edible and have a lovely, mild peppery flavor. They make a beautiful and sophisticated garnish for salads and appetizers.
Why is my arugula so spicy?
Extra spiciness is usually caused by heat or lack of water. When the plant is stressed, it concentrates its flavor compounds. Older leaves also tend to be spicier than young ones.
Does it grow back after you cut it?
Absolutely. As long as you don’t damage the growing point in the center, the plant will continue to push out new leaves for several weeks.
What are the best companion plants?
It grows wonderfully alongside carrots, beets, and onions. I often plant it between rows of slower-growing vegetables to maximize my garden space.
Conclusion: Go Forth and Grow!
Now that we’ve cleared up the mystery and answered is arugula a type of lettuce once and for all, you’re ready to grow! This plant is truly a must-have for any home gardener.
Its speed, flavor, and versatility make it a joy to cultivate. Whether you like it mild and nutty or wild and spicy, there is a variety out there just for you.
Don’t be afraid to experiment with different planting times and locations in your yard. Gardening is all about learning what works best in your unique environment.
So, grab a packet of seeds and start your peppery journey today. Your future salads will thank you for the effort! Happy gardening!
