I’m propagating my partner’s Grandma’s plant. She’s since passed away and it’s in the care of his mom but it’s been alive since the 1960s! So with that being said, I don’t want to mess it up lol! It’s an Arrowhead plant and I have 6 cuttings from it that I am propagating in water. They are already starting to grow roots. How much roots do I need? And when I plant them, should I plant them all in one larger pot since they are such long cuttings?