If you're an avid grower using coco coir as your substrate, you may have wondered about the best frequency for applying nutrient solution (watering/feeding). While it may seem straightforward to feed every day, the reality is a bit more complex.
Traditionally, many growers aim to saturate the coco coir daily in order to achieve 5-10% run-off. This approach ensures that there is a fresh supply of readily-available nutrients in the coco coir, while also washing away any unused food from the previous feeding. However, some growers have started experimenting with the "dry-back" method, which involves deliberately drying out the coco coir to a certain extent in order to stimulate vigorous root growth.
To implement the dry-back method, growers can try reducing the volume of liquid fed to the plants, increasing the time between each feed, or controlling the duration of each feed (in automated systems). The main benefit of this approach is a stronger, more resilient root system that has been adapted through the stress of seeking out moisture and nutrients. Other benefits include reduced water and nutrient usage, less time spent hand-feeding, and increased air porosity in the media.
It's important to note that the dry-back method can be challenging to get right and may require trial and error. It may not be suitable for large-scale manual feeding crops, multi-cropping grows, or systems with high maintenance needs. If you're interested in giving the dry-back method a try, it's best to start slowly and incrementally reduce the volume of nutrient solution until you find the perfect balance for your plants.
At Benchmark Hydroponics, we understand the importance of finding the right balance when it comes to feeding and watering your plants. Contact us today to learn more about our range of hydroponic supplies and how we can support your growing efforts.
