Cross-breading for Tantalplant seeds

[Vidu]

So you guys are saying the premium source on cross-breading in FFXIV is wrong?

https://www.ffxivgardening.com/cross-diagrams

Thavnairian Onion, first diagram.

No, we're saying you're not understanding whats going on in those diagrams.

I would assume that this "loop" thats mentioned on the two diagrams with the arrows (is there a word for that kind of diagram? Flowchart, maybe?) is pretty much what we've been trying to explain to you: You want to keep producing Tantalplant-seeds by constantly crossbreeding wizard eggplant and krakka roots.

The diagrams with the gardenbeds show a step that comes after you actually got your Tantalplant-seeds (and the Royale Kukuru seeds, for that matter). In order to get there - and to keep your crossbreeds going, because its pretty much a waste not to use plants for multiple crossbreeds, you'll want to keep producing Tantalplant-seeds. Non of those diagrams detail how to do that, though.

You can apply the method shown in the diagrams with the gardenbeds or do as Shadygroove suggested: Get 9 krakka root seeds and 4 eggplant ones. Get one "Thorw away Soil" (cheapest you can find) and 12 Thanalan II soils.
Plant your first krakka root using the throw away soil, then plant an eggplant with Thanalan III next to it, next to that krakka and so on. Once you've filled all spots, remove the first krakka root you planted and replace it with a krakka root planted with Thanalan III soil.
Wait 3 days until all Krakka roots are ready to harvest. Harvest the Krakka roots - each crop has a chance to also yield a Tantalplant seed. Your eggplants are still growing, so replant Krakka roots using Thanlan III soil - because they're being planted to eggplants, they'll have a chance to yield Tantalplant seeds in the end aswell.
From this point onwards you should be able to just alternate between harvesting and planting Eggplants and Krakka roots to keep your cross going as long as you wish. Each time you harvest the plants, you have a chance to get a seed on top of your normal crops - replanting only one type of plant at once is key to minimise the amount of seeds and soil you use.