Growing XP Berries from XP Berrie Seeds
Planting and Harvesting XP Berrie Seeds
Craft or obtain XP Berrie Seeds, then plant them on farmland like any other crop. Let them grow to maturity before harvesting. Once ripe, break the crop to collect XP Dust along with more XP Berrie Seeds for replanting.
XP Dust is the harvest product you want from this crop. Keep a steady plot going so you always have a supply on hand for the recipes that use it.
Using XP Dust and XP Rods
XP Dust feeds into further crafting. Save a portion of every harvest instead of using it all at once, since you will need it for other items in the mod.
XP Rod is another item tied into this progression. Check the XP Storage Handbook for the exact recipe that turns your harvested materials into an XP Rod, then craft it once you have the required XP Dust and other ingredients.
Replant immediately after each harvest so the plot never sits empty. A small, well-tended farm produces more over time than a large neglected one.
If you also run XP Storage blocks, the berries give you a renewable source of XP-related materials that does not depend on killing mobs. Combine farming with your storage setup so you can bank experience and craft from the same base.