I ended up giving the plants their first feeding on Day 19. I used a top amending soil method using Gaia Green All Purpose 4-4-4. Since this was their first feeding and the Iced N Baked strain in these plants are notorious for being very sensitive to nitrogen, I did a small dosage on their feeding to play it safe and see how they reacted to it. Gaia Green AP 4-4-4 calls for 1 Tbsp per gallon of medium, I ended up doing a 1/4 tspn per gallon of medium. Once the nutrients were worked into the top soil I mixed up a half gallon of Recharge compost tea and split that between the two plants, which ended up being about two solo cups worth of tea each.
The next day the plants leaves seemed to be drooping just a little and not really lifting until near the end of the day's light cycle. However, the next morning the leaves were looking very perky and happy.