Board Thread:Questions and Answers/@comment-188.179.254.120-20131209144438/@comment-1757231-20131212140637

67.197.36.128 wrote: bonemeal

and once they are grown you never need to chop them just gather the sap every so often That's an IC2 Rubber Tree. Not a RedPower one.

To elabourate, the "giant" trees are from RedPower, and they take extremely long to grow. While I have no actual timeframe, it takes *forever. Have fun! (They supply a good amount of wood though)