I feed every watering with my coco.. I believe you’ll find that is standard. It’s not like soil that maintains some nutrients in the soil. Cocos just an inert substrate with an amazing air to moisture ratio so it’s basically hydroponics.. it would probably work decent if you switch off and on feeding and then watering - but for optimal growth feed every time.
Make sure and supplement with some cal-mag as coco sucks up these naturally for the first couple weeks. So you need to account for that.
Good luck, coco is my favorite to grow in and I’ve done soil, DWC, and coco