Meet the Expert

What Is Companion Planting?

In some cases, a plant could repel one of the main predators of its companion plant.

For easygoing plants like zinnias, there are near endless options for companion plants.

Colorful zinnias in the garden

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“They tend to reduce the need for pesticides which is always a plus.”

Plus, the pop of color just adds to a zinnia’s cheerful presence.

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Marigolds

Getty Images / Simon McGill

Coneflower

For a colorful accompaniment to zinnias that will also last all season long, consider coneflower.

These perky purple blooms thrive in the same sunny conditions as zinnias.

“Once it starts blooming it could last all the way into frost.”

Close up of basil

Getty Images / Ali Majdfar

“The soft whimsical vibe goes perfectly with the cottage feel of the zinnia.”

Vinca is the answer.

“Its very short, so ideal for filling in spaces in the border,” Janney says.

coneflowers

Getty Images / Nancybelle Gonzaga Villarroya

“Vincas are extremely hardy, reliable and heat tolerant.”

Cucumber

Cucumbers are another sun-worshipping plant that grows easily alongside zinnias.

Because zinnias attract pollinators, they’ll help give a boost to your cucumber harvest.

angelonia flowers

The Spruce / Letícia Almeida

these shade-loving flowers will burn up in the full sun conditions that zinnias prefer.

Cauliflower plant with white curd head surrounded by thick leaves

The Spruce / K. Dave

Close up of pink flowers of the annual vinca

Getty Images / Penpak Ngamsathain

May Night salvia

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cucumbers growing

cucumber plant

Dahlias in a field

Getty Images / Alex Manders

Cosmos flowers in a field

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Tomatoes on vine