What to plant next to Shiso
The neighbours on this page are sorted by what the evidence shows: a proven benefit, good with a condition, simply compatible, or to keep apart. Each group says why, and the sources are listed at the end of the page.
Compatible
Avocado tree
Mango tree
Banana plant
Pineapple
Papaya
Cassava
Taro
Passion fruit
Guava
Dragon fruit
Ginger
Turmeric
Kapia pepper
Padrón pepper
Tomato
Cherry tomato
Beefsteak tomato
Plum tomato (Roma)
Bell pepper
Chili pepper
Eggplant
Gogoșar pepper
They grow together without a known conflict, but the benefits traditionally claimed for these pairings are not proven.
Why it helps
Mixing crops in the same bed spreads the risk: pests find their target harder, the soil is used at different depths and flowers bring in the insects that pollinate and hunt aphids.
| Spacing in the row | 30 cm (12 in) |
|---|---|
| In a 30 cm (1 ft) square | 1 per square |
| Crop rotation group | Herbs, flowers and perennials |
| Sow outdoors | May–Jun |
| Harvest | Jul–Sep |
Shiso: spacing, plants per square and companions →
Plan it in the garden
The planner warns you when two crops with a documented shared risk, such as tomatoes and potatoes, end up next to each other, so you can fix the layout before planting.
Start Planning Your GardenSources
The class of each neighbour on this page rests on these sources.
- The Myth of Companion Plantings (L. Chalker-Scott) — Washington State University Extension for: compatible; checked 2026-10-28