Complementing combinations of plants that should be planted in between each other or in close proximity to each other:
- Horse-radish (stimulated production of potatoes)
- Hemp (keeps the Colorado beetle generally at a distance)
- Borage (lesser rotting of the fruit)
- Pyrethrum (protects against many fungi)
- Ox-Eye daisy (less rotting of the fruit)
- Onion (improved growth, generally keeps mice at a distance)
- Swedish Turnip (improved growth)
- Leek (makes for taller stems)
- Cauliflower (decreases incidence of diseases)
- Celery (against caterpillars of the cabbage-white butterfly)
- Radish (against caterpillars of the cabbage-white butterfly)
- Leek (works against cabbage-fly)
Bean and Peas:
- Celery (decreases incidence of diseases)
- Dill (decreases lice)
- Marrowfat (shelter)
- Leek (decreases incidence of diseases)
- Mais placed at the north side (gives protection/shelter)
- Sage (decrease caterpillars and cabbage-fly greatly)
- Hyssop (decrease caterpillars and cabbage-fly greatly)
- African Marigold (decrease caterpillars and cabbage-fly greatly)
- Chamomile (decrease caterpillars and cabbage-fly greatly)
- Lavender (decrease caterpillars and cabbage-fly greatly)
- Leek (decrease caterpillars and cabbage-fly greatly)
- Leek (work against rootfly)
- Onion (work against rootfly)
- Salsify (work against rootfly)
- Garlic (work against rootfly)
- Shallot (work against rootfly)
- Celery (improves the growth process)
- Chervil (causes stronger taste)
- Cherry (improves taste)
- Chervil (less lice, sturdier crop formation)
- Chervil (stimulates growth)
- Parsley (improved growth)
- African marigold (works against certain types of nematodes)
- Beet (improved growth)
- Chamomile (higher production, works against the maggots of the onion-fly)
Offered by Michel.
I'd like to add the benefits of growing lettuce with tomatoes. Apparently lettuce gives off an exudate that slows the activity of Fusarium wilt in tomato plants. (pg 453, Hydroponic Food Production)
Offered by Steve.
Also, if you grow basil and or oregano in the same area it provides natural bug repellent.
Offered by Martha.
Green peppers grow well with tomatoes as well.
Offered by Barb.
I read in one of my catalogs that inter-planting radishes with beans will help repel those notorious bean beetles. They suggest to successively plant the radishes every two weeks in order to maintain your crop, but since most of us will be leaving a fair amount of them to go to seed, that won't be as much of a consideration for us.
Offered by Roger.