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Companion planting

Chilli Companion Plants

Beneficial and avoid companions for Chilli, aggregated from open plant-variety notes (pest deterrence, soil sharing, and flavour).

Chilli growing calendar → Companions

Adapted from Wind River Greens Plant Variety Database (CC BY 4.0) — 73 varieties in pepper. Credits

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Plant together

Companions often recommended near Chilli.

  • Basil (73)

    Repels aphids, spider mites, and thrips while potentially enhancing pepper flavor Repels aphids, spider mites, and thrips while potentially improving pepper flavor

  • Oregano (73)

    Repels aphids and provides ground cover while enhancing pepper growth Repels cucumber beetles and provides ground cover to retain soil moisture

  • Carrots (72)

    Help break up soil and don't compete for nutrients, allowing better root development Help break up soil around pepper roots and don't compete for nutrients

  • Parsley (71)

    Attracts beneficial insects like parasitic wasps that control pepper pests Attracts beneficial insects like hoverflies that prey on pepper pests

  • Onions (45)

    Repel aphids, spider mites, and other pests through their strong sulfur compounds Repel aphids, thrips, and other pests that commonly attack peppers

  • Marigolds (39)

    Repel nematodes, aphids, and whiteflies while attracting beneficial insects Deters nematodes, aphids, and whiteflies with natural pest-repelling compounds

  • Nasturtiums (39)

    Act as trap crops for aphids and cucumber beetles while attracting beneficial predators Acts as trap crop for aphids and cucumber beetles while attracting predatory insects

  • Tomatoes (39)

    Similar growing requirements and can share support structures, though keep adequate spacing Similar growing requirements and can share space efficiently, mutual pest deterrence

  • Marigold (34)

    Deters nematodes, aphids, and whiteflies with natural compounds Deters nematodes, aphids, and whiteflies with natural pest-repelling compounds

  • Nasturtium (31)

    Acts as trap crop for aphids and cucumber beetles, drawing them away from peppers Acts as trap crop for aphids and cucumber beetles

  • Tomato (29)

    Share similar growing conditions and can help confuse pests through companion diversity Similar growing requirements and both benefit from same companion plants

  • Chives (24)

    Repels aphids and may improve pepper growth and flavor Repels aphids and may help improve pepper growth and disease resistance

  • Lettuce (4)

    Provides living mulch, conserves soil moisture, and harvested before peppers need full space Provides ground cover and living mulch while utilizing different soil layers

  • Spinach (4)

    Provides living mulch and cool-season harvest without competing for space Provides living mulch and cool-season companion that doesn't compete for space

  • Cilantro (3)

    Attracts beneficial predatory insects and provides pest confusion Attracts beneficial predatory insects and can provide shade for pepper roots

  • Onion (3)

    Deters aphids, thrips, and other soft-bodied insects with sulfur compounds Repels aphids, thrips, and other pests while improving soil health

  • Carrot (1)

    Loosens soil for pepper roots and doesn't compete for nutrients

Keep apart

Combinations often avoided near Chilli.

  • Fennel (73)

    Inhibits growth of peppers through allelopathic compounds Produces allelopathic compounds that inhibit growth and development of peppers

  • Brassicas (68)

    Compete heavily for nutrients and may stunt pepper growth through root competition Compete for similar nutrients and may stunt pepper development

  • Black Walnut (53)

    Produces juglone which is toxic to peppers and causes stunted growth Produces juglone toxin that stunts pepper growth and can cause wilting

  • Apricot Trees (9)

    Can harbor verticillium wilt that spreads to pepper plants Can harbor verticillium wilt which easily spreads to pepper plants

  • Black Walnut Trees (9)

    Produce juglone toxin that causes wilting and death in pepper plants Produce juglone, a chemical toxic to peppers and other nightshade plants

  • Kohlrabi (6)

    Competes heavily for nutrients and can stunt pepper plant development Competes for nutrients and may stunt pepper plant development

  • Walnut Trees (6)

    Produce juglone, a toxic compound that causes wilting and death in pepper plants Produce juglone which is toxic to peppers and causes wilting

  • Apricot Tree (4)

    Can harbor verticillium wilt which easily spreads to pepper plants Can harbor diseases that affect nightshade family plants

  • Beans (2)

    Can shade peppers and compete for nutrients, potentially reducing pepper yields Fix nitrogen which can cause peppers to produce excessive foliage at expense of fruit

  • Black Walnut Tree (1)

    Releases juglone toxin that stunts pepper growth and can kill plants

  • Walnut (1)

    Releases juglone toxin that stunts pepper growth and causes wilting

FAQ: companion planting with Chilli

What are good companion plants for Chilli?

Frequently cited companions include Basil, Oregano, Carrots, Parsley, Onions, Marigolds, Nasturtiums, Tomatoes, Marigold, Nasturtium, Tomato, Chives. Reasons come from open cultivar notes (pest deterrence, soil, flavour).

What should I avoid planting near Chilli?

Often avoided: Fennel, Brassicas, Black Walnut, Apricot Trees, Black Walnut Trees, Kohlrabi, Walnut Trees, Apricot Tree, Beans, Black Walnut Tree.

Companion effects vary by climate, soil and variety. Confirm with local extension. Data adapted from Wind River Greens Plant Variety Database (CC BY 4.0).