Radish companion plants
Radishes (*Raphanus sativus*) occupy a unique position in companion planting: they are both a host crop (something other plants are placed near to protect) and a service plant (used to benefit their neighbors). This dual role makes them one of the most versatile quick-maturing plants in the.
Radishes (Raphanus sativus) occupy a unique position in companion planting: they are both a host crop (something other plants are placed near to protect) and a service plant (used to benefit their neighbors). This dual role makes them one of the most versatile quick-maturing plants in the vegetable garden.
Their 25–30 day maturity means they function as space holders between slower crops, as row markers for slow-germinating seeds, and as trap crops for certain pests.
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The companion planting table
| Plant | Role | Friend / Foe / Neutral | Notes |
|---|---|---|---|
| Carrots | Radish marks carrot rows; different maturity timing | Friend | Radish harvest doesn't disturb carrot roots |
| Lettuce | Efficient space companion; cool-season pairing | Friend | Interplant between radish and lettuce for efficient bed use |
| Spinach | Same cool-season window; efficient companion | Friend | Compatible; different root zones |
| Cucumber | Radish as flea beetle trap crop; may deter cucumber beetles | Friend | Plant radishes at cucumber bed edges |
| Chervil (Anthriscus cerefolium) | Traditional companion claimed to improve radish growth | Friend (weak evidence) | Limited controlled evidence; low-risk |
| Nasturtium | Radish under nasturtiums uses space efficiently | Neutral | No documented pest synergy |
| Peas | Cool-season compatible; efficient space pairing | Neutral | Plant at trellis base |
| Beets | Root crop competition if planted too densely | Neutral | Space carefully; 3-inch minimum separation |
| Hyssop | Claimed to deter flea beetles from radishes | Friend (traditional) | Anecdotal; traditional kitchen garden use |
| Other brassicas (cabbage, kale, broccoli) | Shares flea beetle and diamondback moth | Foe (concentrated) | Amplifies shared pest pressure when adjacent |
| Fennel (Foeniculum vulgare) | Allelopathic to radishes | Foe | Separate beds |
| Mustard (mature) | Same family; shares pests | Foe | Use young mustard as trap crop only |