When Voidwatch gives you kitron, don’t make kitronade. Make Voidwatch take the kitron back! Get mad! I don’t want your damn kitron, what the hell am I supposed to do with these? Demand to see Voidwatch’s manager! Make Voidwatch rue the day it thought it could give you kitrons! Do you know who I am? I’m the man who’s gonna burn your house down! With the kitron! I’m gonna get my engineers to invent a combustible kitron that burns your house down!
These are made using Tree Saplings, (Fed 2 Earth Crystals, usually yield 9-18 depending on pot), and those Tree Saplings are made from Tree Cuttings (No crystals Fed, yield 1-2 depending on pot). So if you're planning to grow these, the process would be to:
1) Get Tree Cuttings - Don't feed crystals
2) Replant Tree Saplings - Feed 2 Earth Crystals
3) Harvest
Of course this won't be done overnight so easily it'll take about a month or so at least.
Sells to merchant for 347gil each or 4164gil per stack which makes AHing them for 4-5k barely worthwhile especially after you consider the tax and time it takes to actually sell them.