The practice of applying fertiliser through an irrigation system, dissolving nutrients directly into irrigation water. Used in drip irrigation systems for precise, efficient nutrient delivery.
Fertigation combines fertilising and irrigation into a single operation, making it an ideal solution for Australian gardeners managing water restrictions and variable climates. The system works by injecting soluble fertiliser into your irrigation line, whether drip systems, micro-sprinklers, or larger garden setups. This approach offers several advantages: nutrients reach the root zone directly, reducing runoff and loss to leaching; plants receive consistent nutrition throughout the growing season; and you use less water overall compared to traditional fertilising methods.
In Australian climate zones, fertigation proves particularly valuable during hot, dry summers (December-February) when regular watering is essential. Tropical and subtropical gardeners benefit from frequent nutrient delivery during the growing season, whilst temperate zone gardeners can adjust application rates seasonally. The method works well for vegetable patches, container gardens, and established landscape plants. You can purchase fertigation kits from Bunnings or specialised irrigation suppliers, ranging from simple injector systems for small gardens to sophisticated setups for larger properties.
When implementing fertigation, use only soluble fertilisers designed for irrigation systems to prevent clogging. Monitor soil regularly and adjust nutrient concentrations based on plant growth and seasonal demands. In winter (June-August), reduce or cease applications as most plants enter dormancy. This technique is particularly effective for thirsty crops like tomatoes, cucumbers, and ornamental shrubs in Australian gardens, helping conserve water whilst maintaining optimal plant nutrition.