A pair is listed only when a row is stored. Unknown is not the same as a bad pairing. The companion checker is the full matrix.
Pairs stored for marigold or tomato
Marigold and Tomato · good
Marigold with tomato. Root exudates suppress root-knot nematode, and the volatiles deter whitefly and thrips.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Basil and Tomato · good
Basil with tomato. It deters tomato fruit borer.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Cabbage and Tomato · bad
Tomato with cabbage. Nutrient competition and a humid canopy. Soft rot and late blight are the concern.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Cauliflower and Tomato · bad
Tomato with cauliflower. Nutrient competition and a humid canopy. Soft rot and late blight are the concern.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Corn and Tomato · bad
Maize next to tomato is a bridge host for tomato fruit borer (Helicoverpa armigera).
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
The marigold Short is about growing marigolds from seed in a pot. Marigold has no stored spacing or day count, so those fields are not filled in here.
Marigold
- Days on the crop record: not stored.
- In-row spacing: not stored.
- Between-row spacing: not stored.
Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
No crop page is published for Marigold.
Tomato
- Days on the crop record: not stored.
- In-row spacing: not stored.
- Between-row spacing: not stored.
The calendar day count for this crop is a farmer field note, listed below when this guide includes field figures.
Official sourceUnverified — based on HORDI Crop - Tomato, Department of Agriculture Sri Lanka, accessed 2026-10-20: https://doa.gov.lk/hordi-crop-tomato/; confirm for your microclimate.
Pairs stored for maize or yard long bean
Corn and Yard long bean · good
Maize is the trellis, and the yard long bean fixes nitrogen.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Corn and Tomato · bad
Maize next to tomato is a bridge host for tomato fruit borer (Helicoverpa armigera).
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Big onion and Yard long bean · bad
Alliums with legumes. The allium suppresses nodulation.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Red onion and Yard long bean · bad
Alliums with legumes. The allium suppresses nodulation.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Garlic and Yard long bean · bad
Alliums with legumes. The allium suppresses nodulation.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Leek and Yard long bean · bad
Alliums with legumes. The allium suppresses nodulation.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Spring onion and Yard long bean · bad
Alliums with legumes. The allium suppresses nodulation.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Basil with fruiting crops
Basil and Tomato · good
Basil with tomato. It deters tomato fruit borer.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Basil and Eggplant · good
Basil with brinjal. It deters tomato fruit borer.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Basil and Sweet pepper · good
Basil with capsicum. It deters tomato fruit borer.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Basil and Chilli pepper · good
Basil with chilli. It deters tomato fruit borer.
Farmer field notenoted Oct 2026Unverified — based on Farmer field experience, noted 2026-10-23; confirm for your microclimate.
Gotukola
No companion row calls gotukola a groundcover. The crop page is separate from the pair list, and this guide does not add a groundcover relationship.
No companion row is stored for these crops.
Gotukola
- Days on the crop record: 100 days.
- In-row spacing: not stored.
- Between-row spacing: not stored.
Unverified — based on HORDI Crop - Gotukola, Department of Agriculture Sri Lanka, accessed 2026-10-20: https://doa.gov.lk/hordi-crop-gotukola/; confirm for your microclimate.