5 Companion Herbs for Healthy Summer Crops

Planting companion herbs is the mainstay of organic gardening. This is because of the role it plays in combatting pests and diseases naturally without having to resort to poisons. A poison-free garden is not only good for us, but also for the environment. Gardening without poisons is particularly important for the protection of pollinators like birds, bees and butterflies.

1. Sweet basil

Sweet basil should be planted lavishly. It is a culinary herb that we can’t get enough of, but it is also a general insect repellent for all plants. It is especially beneficial for tomatoes and carrots, improving their flavour and just helping them to grow better.

2. Chives and garlic chives

Chives and garlic chives are unassuming culinary herbs that pack a powerful punch. They can be extensively used in the food garden because they take up very little space. Most insects, as well as slugs, are repelled by the garlic or onion smell of chives.

Plant chives as companion herbs alongside squashes, cucumbers and marrows. They will help to clear powdery mildew and repel bugs that sting squashes. Other plants that benefit from being near chives are brassicas, carrots, brinjals, peppers, potatoes, tomatoes and strawberries.

3. Southernwood

Southernwood has medicinal rather than culinary properties, which is why it may be overlooked. It is an attractive small bush with pungent, grey-green leaves. As a companion herb the whole plant deters insects and can therefore be used as general insect repellent. Cut it back in winter. Branches can be laid between rows of onions and carrots. This will deter onion and carrot fly, and if grown near fruit trees it deters fruit tree moth. Medicinally, southernwood improves liver function, digestion and poor appetite.

4. Coriander

Coriander is an acquired taste for most humans because of its pungent aroma and flavour. Fortunately, insects never acquire the taste for it. It is a great aphid repellent and also sends potato beetles and spider mites packing. Coriander grows easily and prolifically. After picking the first leaves (which are the tastiest and most tender) let the plant flower and play its role as the pest police.

5. Oregano

Oregano contains high levels of aromatic thymol, which has strong insect-repelling abilities. This also makes it useful as a pesticide in natural control remedies. Its flowers attract bees and butterflies. Use the groundcover varieties as insect-repellents, especially prostrate varieties like golden oregano and ‘Country Cream’ (a variegated variety).