Zinnia Companion Plants
Flower60 days to maturity
Zinnias (Zinnia elegans) are fast, heat-loving annual flowers that bloom in vivid colors from midsummer until frost, making them a favorite cut flower. Their open, daisy-like blooms are powerful pollinator and beneficial-insect magnets, drawing bees, butterflies, hoverflies, and predatory wasps into the vegetable garden. Many gardeners also use them as a trap crop to lure Japanese beetles away from prized crops.
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Companion Planting Strategy for Zinnia
Zinnias are planted among vegetables chiefly to pull in pollinators and beneficial predators: bees for fruit set and ladybugs, hoverflies, and wasps for pest control. Their bright blooms also act as a sacrificial trap crop, drawing Japanese beetles and other pests away from food crops.
Best Companion Plants for Zinnia
These plants grow well alongside Zinnia — providing pest control, attracting pollinators, or making better use of your garden space.
Zinnias attract pollinators and predatory insects like ladybugs and hoverflies that improve fruit set and control aphids, and they lure Japanese beetles away as a trap crop.
Zinnias draw bees and predatory wasps that boost pollination and prey on bean pests like aphids and beetles.
Zinnias attract the bees that cucumbers depend on for pollination, improving fruit set, while also pulling in cucumber beetles as a trap.
How to Grow Zinnia
- Botanical name
- Zinnia elegans
- Family
- Aster/Daisy (Asteraceae)
- Sun
- Full sun, 6 or more hours daily
- Water
- About 1 inch per week at the base; avoid overhead watering to prevent mildew
- Soil
- Rich, well-draining soil, pH 5.5-7.5
- Spacing
- 6-18 inches apart depending on cultivar size
- Planting depth
- Sow seed 1/4 inch deep
- Germination
- 5-7 days at 70-75F
- Days to maturity
- 60-70 days from seed to first bloom
- When to plant
- Direct-sow after the last frost once the soil is warm
- Harvest
- Blooms midsummer to frost; cut flowers in the morning when fully open and deadhead regularly to prolong flowering
Common Zinnia Problems
Powdery mildew (white powdery coating on leaves)
The most common zinnia issue. Space plants for airflow, water at the base, plant in full sun, and choose mildew-resistant series like Profusion or Zahara.
Alternaria and bacterial leaf spot (brown or reddish spots on foliage)
Remove and destroy infected leaves, avoid overhead watering, and give plants room to dry between rains.
Aphids on buds and new growth
Blast them off with water and rely on the ladybugs and lacewings the flowers attract; use insecticidal soap for heavy infestations.
Japanese beetles and spider mites
Handpick Japanese beetles into soapy water in the morning, and spray mites off with water; zinnias are often grown specifically as a beetle trap crop.
Zinnia Companion Planting FAQ
What are the best companion plants for zinnias?
Zinnias are outstanding companions for tomatoes, beans, and cucumbers because their bright blooms pull in bees for pollination and predators like ladybugs and hoverflies for pest control. They also lure Japanese beetles away as a trap crop.
What should you not plant with zinnias?
Zinnias have no real incompatible companions and mix safely with nearly all vegetables and flowers. The only caution is spacing them for airflow, since crowding promotes the powdery mildew zinnias are prone to.
Do zinnias attract pollinators?
Yes, zinnias are among the best pollinator magnets you can plant, drawing bees, butterflies, hoverflies, and beneficial wasps all season. That is why they are so often interplanted with fruiting vegetables that need pollination.
How do you prevent powdery mildew on zinnias?
Space plants well for air circulation, water at the base rather than overhead, plant in full sun, and choose mildew-resistant series like Profusion or Zahara. Removing affected lower leaves also slows the spread.
More flower companions
Plan Your Zinnia Garden
Use our interactive tools to design the perfect garden with Zinnia and its companions.