When i first transplant seedlings/cuts into 1-3 gallons, i water them thoroughly to runnoff. Then i let them get drier than i normally would. As the medium dries out, the baby roots will go searching for water. You'll get very fast root development this way. But I only do it the first time upon transplanting. The subsequent waterings go back to the regular wet/dry cycle trying to keep the medium moist but not soggy with about 20% runoff.
Young plants usually go 3-4 days after getting initially soaked down. Then every couple days for a few weeks while the roots grow. After a few weeks it's usually down to once a day feedings.
By day 3-5 the roots are always poking out the bottom of the pots. The wet/dry cycle manipulation is one of the many benefits of coco
Also - the plants won't grow much vertically until the roots hit the bottom of the pot. Once the roots reach the bottom of the container and establishes it's new root zone depth, the above-ground growth will explode.