What Plants to Avoid with Lettuce

What plants to avoid with lettuce? As a beginner gardener, it’s easy to overlook the potential dangers certain plants can pose to your crops. Lettuce is a cool-season crop that thrives well when grown along with certain plants but can suffer if grown along with others. 

By understanding which plants are harmful to lettuce, you can ensure that your garden thrives and produces healthy, delicious greens for you and your family to enjoy. Let’s dive into what plants to avoid when planting lettuce so that you can grow a bountiful harvest!

Rows of different kinds of lettuce plants in a garden.

Common Bad Companion Plants with Lettuce:

Here’s a list of plants that should not be grown with lettuce, the reasons why, and the potential adverse effects it can bring.

Plant NameReasons to AvoidPotential Negative Effects on Lettuce
BroccoliProduces chemicals that stunt growth and attract pests.It stunts the growth of lettuce and attracts pests like aphids and flea beetles.
CabbageAttracts common pests, such as cabbage worms and root maggots, that can damage lettuce.Invites pests that can harm the lettuce leaves and roots.
CauliflowerCompetes with lettuce for nutrients and space, leading to stunted growth.Reduces the vigor and growth of lettuce and can lead to poor yields.
CeleryRequires different growing conditions, such as more water and fertilizer, that can negatively impact lettuce growth.Competes with lettuce for water and nutrients, leading to reduced yields and poor-quality lettuce.
DillAttracts tomato hornworm, a pest that also feeds on lettuce.Invites pests that can harm lettuce and other plants in the garden.
FennelProduces chemicals that stunt the growth of lettuce and attract pests, such as aphids.Stunts the growth of lettuce and invites pests that can harm the leaves and roots.
SpinachCompetes with lettuce for nutrients and space, leading to stunted growth and reduced yields.Reduces the vigor and growth of lettuce and can lead to poor-quality lettuce.
SunflowersAttract aphids, which can spread diseases to lettuce.Invites pests that can harm the leaves and quality of lettuce.
TomatoesCompete with lettuce for nutrients, water, and space, and can attract pests that harm lettuce.Reduces the vigor and growth of lettuce and can lead to poor yields and quality of lettuce.
WormwoodChemicals produced by wormwood can stunt the growth of lettuce.Stunts the growth of lettuce and can lead to poor yields.

Note: Avoid planting these near lettuce to prevent stunted growth, reduced yields, and the attraction of pests that can harm lettuce leaves and roots. To promote healthy growth and avoid damage to lettuce, it is important to research and plan for companion planting in your garden.

Rows of lettuce plants beside rows of radish plants in a garden.

What can I plant between lettuce?

If you’re wondering what to plant between your lettuce, you’re not alone. Many gardeners want to maximize their space and grow multiple crops in one area. Luckily, there are plenty of options that thrive alongside lettuce.


Radishes grow quickly and don’t take up much space, making them a great companion for lettuce. Plus, the spicy flavor of radishes can help deter pests from munching on your greens.

Cilantro or Dill

These plants add flavor to salads and can attract beneficial insects like bees and butterflies to your garden. Just make sure to choose varieties that will stay on top of your lettuce or compete too heavily for nutrients. With some planning and creativity, you can create a diverse and productive garden bed filled with delicious vegetables and herbs!


Spinach has similar growing requirements as lettuce, making it an ideal companion plant. It also adds some depth of flavor when combined with your salads.


Planting asparagus with lettuce is a great way to maximize the use of your garden space. Asparagus is a perennial vegetable that takes a few years to establish but can produce for up to 20 years! Lettuce, on the other hand, is an annual vegetable that grows quickly and can be harvested multiple times in one season.


Carrots and lettuce are both cool-season crops that prefer well-drained soil and full sun. When planted together, the lettuce provides shade for the carrots as they grow, which helps keep the soil moist and cool. Additionally, the carrots help break up compacted soil for the shallow-rooted lettuce. 

Rows of large lettuce plants with colorful marigolds in the background and the forefront. Image also includes other plant varieties.

What flowers can I plant next to lettuce?

You’re not alone if you’re wondering what flowers to plant between your lettuce, and what would complement it well. The good news is that there are several options that will not only look beautiful but will also help your lettuce thrive.


These vibrant flowers not only add a pop of color to your garden but also deter pests like aphids and nematodes that can harm lettuce plants.


This herb produces edible blue flowers that attract pollinators like bees and butterflies which can help increase the yield of your vegetable crop.


Amaranth is an ancient grain that has been cultivated for thousands of years. It is high in protein, fiber, and other nutrients, making it an excellent addition to any diet. 


Calendula, also known as pot marigold, produces bright yellow or orange flowers that can be used for medicinal purposes or added to salads for a pop of color. 


Nasturtiums are known for their brightly colored flowers and edible leaves and flowers. They also happen to be great companion plants for lettuce because they deter pests like aphids, whiteflies, and cucumber beetles. Plus, their sprawling growth habit can shade the delicate lettuce leaves during hot summer months.

Can you grow lettuce and cucumbers together?

The good news is that lettuce and cucumbers can be grown together! In fact, they are actually great companion plants because they have similar growing requirements. Both of these vegetables thrive in cool weather conditions with plenty of sunlight and consistent moisture. Plus, when grown together, the lettuce acts as an excellent ground cover that helps retain moisture while also providing shade for the cucumber roots.

Pinterest image of a close-up lettuce in the background plus the text - What Plants to Avoid with Lettuce. The site's link is also included in the image.

Lettuce is a versatile and healthy ingredient that can be used in various dishes. However, it is important to avoid planting certain plants alongside lettuce to prevent adverse effects on its growth and flavor. 

By taking the time to research which plants are compatible with lettuce, you’ll not only ensure a more successful harvest but also a tastier one. So before planting your next batch of veggies, be sure to carefully consider which ones should stay away from your precious lettuce crop and watch your garden flourish!

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