Ok now ..... i will maybe look like idiot whos asking stupid questions again and again but i have no idea where to get them. I dont have any of them and i finished everything expect that one abomination and i think that i explored most places.Pink, Blue, Red and Purple seeds you get from sleeping in bed are boosts for your characters (or just Fellana, I'm not sure).
Seeds you need for your abomination ally are: Cold, Growing, Ominous, Pulsating and Spiked. And you used them by equipping them on your abomination (I think it can only be done once you chose to start dungeon).