FIrst Twso seeds you need to enter the little cove where the 4th seed is. You interact with a doorway to deactivate some sort shield.
When you do enter you need to kill every ant in there, they come in about 3 or 4 waves, then you can approach the access and jump down and go up to teleport to the first two seeds location.

If it doesn't work, just move on, get other seeds, reenter dungeon and retry