Basic questions are the only way to start! I would transplant established plants simply for speed's sake, but you can plant seeds for sure - they just wouldn't benefit from the system until the roots made their way down into the channels. The best way to make sure they remain moist is to use a seed starting plug made of peat or coco coir that retains water well so the seed has plenty to germinate and for roots to grow down.
Thanks for reading!
Thanks for the information, it’s all really fascinating. What do you add to the water to provide the nutrients for plant growth?
I use General Hydroponics Flora series nutrients :)