Growing two or more crops in the same space simultaneously. Maximises productivity, can provide mutual pest protection, and makes efficient use of growing space and time.
Interplanting, also called companion planting, is a sustainable gardening technique that works well across most Australian climate zones. By strategically positioning different plants together, you can create a more efficient and productive garden. For example, planting basil near tomatoes can improve flavour and deter pests, while nasturtiums act as sacrificial crops that attract aphids away from vegetables. In warmer zones (8-11), interplanting leafy greens under taller plants provides afternoon shade during hot summers, reducing water stress. Nitrogen-fixing plants like beans or peas grown alongside heavy feeders like corn or pumpkins improve soil fertility naturally. During spring (Sep-Nov) and autumn (Mar-May), interplanting cool-season crops works particularly well in most regions. Tall plants like sunflowers can support climbing beans, while low-growing marigolds utilise otherwise empty space between larger vegetables. When planning interplants, consider mature plant sizes, root depths, and water requirements to avoid competition. You can purchase companion planting guides and seeds from Bunnings, which stocks popular interplanting combinations. This technique also reduces the need for chemical pesticides and fertilisers, making it economical and environmentally friendly for Australian gardens of any size.