Companion Plant Guide
Tomato
Slows whitefly on tomatoes; roots suppress nematodes.
Flower · Aster family
Marigold companion plants
Tagetes patula
What to plant beside marigold, what to keep apart, and how to grow it — sun, spacing, soil and the pairings used in this guide.
Photo: Ilja Dijkstra on Unsplash
Overview
Growing marigold beside the right neighbour
Marigold (Tagetes patula) is a flower in the Aster family. Bright flower that repels pests and attracts pollinators.
Marigold roots release a compound that clears nematodes — worth a border in every bed.
Give plants 9–12 in in full sun. Aim for well-draining, poor to moderate fertility. In most gardens the crop sits in USDA zones 2-11 (annual) and is ready in about 45-55 days.
Grows well with
What to plant with marigold
The strongest companions for marigold in this guide are Tomato, Pepper, and Asparagus. Each pairing below is a reason to share a bed — pest masking, roots that do not compete, or insects that hunt the pests marigold attracts.
Pepper
Same whitefly and nematode help as with tomato.
Asparagus
Repels asparagus beetle.
In the bed
How to grow marigold
| Sun | Full sun |
|---|---|
| Spacing | 9–12 in |
| Soil | Well-draining, poor to moderate fertility |
| Hardiness | Zones 2-11 (annual) |
| Days to maturity | 45-55 |
These notes sit beside the companion lists — they are how marigold actually occupies the bed, not a substitute for local climate.
- Tolerates poor soil well
- Deadhead for continuous blooms
- Self-seeds readily
- Attracts bees and butterflies
Questions
Marigold companion planting FAQ
What can I plant next to marigold?
Plant Tomato, Pepper, and Asparagus beside marigold. Tomato: Slows whitefly on tomatoes; roots suppress nematodes. Pepper: Same whitefly and nematode help as with tomato. Asparagus: Repels asparagus beetle.
What should I not plant with marigold?
Marigold has no recorded antagonists in this guide.
How much sun does marigold need?
Marigold wants full sun. Space plants 9–12 in apart in well-draining, poor to moderate fertility.
How long does marigold take to mature?
Most marigold crops in this guide mature in 45-55 days, in hardiness zones 2-11 (annual).
Compare every pairing at a glance
Open the guide, pick marigold, and see what thrives alongside it — and what quietly holds it back.
Open the pairing guide