Companion Plant Guide
Basil
Shares warmth and humidity; aromatic pest cover.
Vegetable · Nightshade family
Pepper companion plants
Capsicum annuum
What to plant with peppers, what to keep apart, and how to grow them — sun, spacing, soil and the reason behind every pairing.
Photo: Greg Daines on Unsplash
Overview
Growing peppers beside the right neighbour
Pepper (Capsicum annuum) is a vegetable in the Nightshade family. Heat-loving plant that needs warm temperatures to thrive.
Peppers want the same warmth and humidity as basil, so the two share a bed happily.
Give plants 18–24 in in full sun. Aim for well-draining, fertile, warm soil. In most gardens the crop sits in USDA zones 2-11 (annual) and is ready in about 60-90 days.
Grows well with
What to plant with peppers
The best companion plants for peppers in this guide are Basil, Onion, Spinach, Oregano, Tomato, Carrot, Marigold, Parsley, and Nasturtium. Each pairing below is a reason to share a bed — pest masking, roots that do not compete, or insects that hunt the pests drawn to peppers.
Onion
Pest deterrent, good space utilization.
Spinach
Ground cover, reduces weeds.
Oregano
Dense low cover that shades the soil and draws in predatory insects.
Tomato
Same needs — sun, warmth and steady feeding — so they share a bed easily.
Carrot
Roots sit below the pepper root zone, so they share the row.
Marigold
Slows whitefly; roots suppress nematodes.
Parsley
Umbels draw in hoverflies and wasps that hunt aphids.
Nasturtium
Trap crop that pulls aphids off the plants.
Pepper is also a good companion for
Garlic — Strong scent helps deter aphids.
Keep apart
What not to plant with peppers
Keep peppers away from Fennel and Cabbage. These neighbours compete for the same food, release chemicals that stunt growth, or otherwise hold the crop back.
Fennel
Inhibits pepper growth and germination.
Cabbage
Brassicas compete with peppers for the same food.
In the bed
How to grow peppers
| Sun | Full sun |
|---|---|
| Spacing | 18–24 in |
| Soil | Well-draining, fertile, warm soil |
| Hardiness | Zones 2-11 (annual) |
| Days to maturity | 60-90 |
These notes sit beside the companion lists — they are how pepper actually occupies the bed, not a substitute for local climate.
- Start indoors 6-8 weeks before last frost
- Keep soil warm for best growth
- Mulch heavily to maintain soil temperature
- Pinch first flowers for stronger plants
Questions
Pepper companion planting FAQ
What can I plant next to peppers?
Plant Basil, Onion, Spinach, Oregano, Tomato, Carrot, Marigold, Parsley, and Nasturtium beside peppers. Basil: Shares warmth and humidity; aromatic pest cover. Onion: Pest deterrent, good space utilization. Spinach: Ground cover, reduces weeds. Oregano: Dense low cover that shades the soil and draws in predatory insects. Tomato: Same needs — sun, warmth and steady feeding — so they share a bed easily. Carrot: Roots sit below the pepper root zone, so they share the row. Marigold: Slows whitefly; roots suppress nematodes. Parsley: Umbels draw in hoverflies and wasps that hunt aphids. Nasturtium: Trap crop that pulls aphids off the plants.
What should I not plant with peppers?
Keep peppers apart from Fennel and Cabbage. Fennel: Inhibits pepper growth and germination. Cabbage: Brassicas compete with peppers for the same food.
How much sun do pepper plants need?
Pepper plants want full sun. Space them 18–24 in apart in well-draining, fertile, warm soil.
How long do pepper plants take to mature?
Most pepper plants are ready in about 60-90 days. Pepper grows in USDA hardiness zones 2-11 (annual).
Compare every pairing at a glance
Open the guide, pick pepper, and see what thrives alongside it — and what quietly holds it back.
Open the pairing guide