The FTB Forum is now read-only, and is here as an archive.
To participate in our community discussions, please join our Discord! https://ftb.team/discord
Are you asking because you don't have aura nodes there? If yes you can't actually plant Silverwood Trees as they require aura to grow and create the aura node which will end up being less aura overall.
To generate the aura nodes you can go to Thaumcraft config and make it regenerate its world gen.
