Good & Bad Watermelon Companion Plants

You want to grow watermelons in your garden or on your balcony but don’t know what plants to grow with watermelons? Great!

This blog post is exactly for you since I show you the best and worst watermelon companion plants in the following.

Why do I need Companion Plants for growing Watermelons?

In theory, you could also grow watermelons without any other plants around them.

Yet, you would miss out on many benefits by doing so. In fact, good companion plants can improve the overall growth behavior and the yields of your watermelons.

Among others, companion plants can attract pollinators, serve as a ground cover to keep the soil moist, loosen the soil, provide shade, keep away pests and may enhance the flavor of your crops in general.

As you can see, good companion plants can really improve the overall growth conditions of your watermelon plants.

However, there are also plants you should never grow with watermelons.

Prepare the soil!

Thus, make sure to have a look at the following tables to figure out what plants to grow with watermelons and what plants you should avoid and why.

Good Watermelon Companion Plants

Companion PlantWhy is it good?
OnionsKeep away pests.
GarlicDeters aphids and other pests.
LeeksKeeps away bugs.
ChivesKeeps away pests.
ShallotsDeter harmful insects.
BeansFix nitrogen in the soil.
CarrotsLoosen the soil.
SpinachGround cover to keep the soil moist.
LettuceGround cover to keep the soil moist.
MintKeeps away pests and improves the flavor of watermelons.
CatnipKeeps away pests and improves the flavor of watermelons.
TansyKeeps away pests.
NasturtiumsAttract pollinators.
MarigoldsAttract pollinators.

Bad Watermelon Companion Plants

Companion PlantWhy is it bad?
SunflowersTake away too much sunlight.
ZucchiniFeed on similar nutrients.
CucumbersInhibit the growth of watermelons.
CauliflowerInhibits the growth of watermelons.
KaleAttracts slugs.
Mustard GreensInhibit the growth of watermelons.
CabbageAttracts bugs.
PumpkinsFeed on similar nutrients.
TomatoesTake away too much sunlight.
PeppersTake away too much sunlight.
PotatoesAttract aphids and other pests.

Best & Worst Watermelon Companion Plants – Summary List

Best Companion PlantsWorst Companion Plants
MintPotatoes
CatnipTomatoes
NasturtiumsPeppers
MarigoldsKale
TansyCabbage
CarrotsMustard
LettuceCucumbers
SpinachCauliflowers
BeansSunflowers
LeeksZucchini
ShallotsPumpkins
Chives
Onions
Garlic

What should you plant with Watermelons?

Good companion plants for watermelons are nasturtiums, marigolds, onions, garlic, shallots, chives, spinach, beans, carrots, lettuce, tansy, mint, catnip and leeks.

You should not plant watermelons with cucumbers, pumpkins, kale, cabbage, sunflowers, cauliflower, zucchini, mustard, potatoes, tomatoes and peppers.

If you want to learn more about growing watermelons, make sure to also check out my grower’s guide on how to grow watermelons from seed to harvest.

About the Author

My name is Andreas and I’m really passionate about our environment and also about growing plants. In fact, I have grown several different plants over many years. I love to see my plants grow and also always try new things to improve my overall conditions at home.

In my blog posts, I want to share my experiences with you so that you can become successful in growing various different plants and improving your home as well, even though you might still be a beginner right now.

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