Companion Plant Guide
Carrot
Nitrogen fixing benefits carrot.
Vegetable · Legume family
Pea companion plants
Pisum sativum
What to plant beside pea, what to keep apart, and how to grow it — sun, spacing, soil and the pairings used in this guide.
Photo: Michelle Tresemer on Unsplash
Overview
Growing pea beside the right neighbour
Pea (Pisum sativum) is a vegetable in the Legume family. Cool-season legume that fixes nitrogen for other plants.
Follow peas with a hungry crop — the nitrogen they leave behind is free feed.
Give plants 2–3 in in sun or part shade. Aim for well-draining, moderate fertility. In most gardens the crop sits in USDA zones 2-11 and is ready in about 60-70 days.
Grows well with
What to plant with pea
The strongest companions for pea in this guide are Carrot, Turnip, and Corn. Each pairing below is a reason to share a bed — pest masking, roots that do not compete, or insects that hunt the pests pea attracts.
Turnip
Root crop benefits from nitrogen.
Corn
Natural trellis and nitrogen fixation.
Keep apart
What not to plant with pea
Keep pea away from Onion. These neighbours compete for the same food, release chemicals that stunt growth, or otherwise hold the crop back.
Onion
Inhibits pea growth.
In the bed
How to grow pea
| Sun | Sun or part shade |
|---|---|
| Spacing | 2–3 in |
| Soil | Well-draining, moderate fertility |
| Hardiness | Zones 2-11 |
| Days to maturity | 60-70 |
These notes sit beside the companion lists — they are how pea actually occupies the bed, not a substitute for local climate.
- Sow in early spring for spring crop
- Provide trellis or fence for climbing
- Harvest pods when young and tender
- Nitrogen fixation benefits next crop
Questions
Pea companion planting FAQ
What can I plant next to pea?
Plant Carrot, Turnip, and Corn beside pea. Carrot: Nitrogen fixing benefits carrot. Turnip: Root crop benefits from nitrogen. Corn: Natural trellis and nitrogen fixation.
What should I not plant with pea?
Keep pea apart from Onion. Onion: Inhibits pea growth.
How much sun does pea need?
Pea wants sun or part shade. Space plants 2–3 in apart in well-draining, moderate fertility.
How long does pea take to mature?
Most pea crops in this guide mature in 60-70 days, in hardiness zones 2-11.
Compare every pairing at a glance
Open the guide, pick pea, and see what thrives alongside it — and what quietly holds it back.
Open the pairing guide