I'm not sure if I've done something wrong, but I was attempting to plank Krakka Root and Chamomile to get Curiel Root seeds. Because of the shorter grow time my Krakka Root matured to harvest first, but died off completely before my chamomile could mature. My understanding is that you need to have all the plants in the bed to get the crosses, and even though I planted fresh Krakka Roots, I got only one Curiel Root seed when the chamomile matured.

Any thoughts on what I did wrong, or how to prevent that from happening?