My current embark is mostly savanna biome, which grows very few trees. I've dug out and muddied around 700 blocks for underground tree-farming, but it's taking a really long time for saplings to appear and then grow to be trees. (I guess I could add my 250 or so blocks of underground pasture to that count as long as sheep, llamas, and pigs don't eat tree saplings. Do grazers consume saplings and shrubs or just moss?)
Most of the wood I've felled or traded for has gone to making beds, bins, and barrels. There's not much left over for steel (charcoal), potash (farming), pearlash (clear glass for a big window project), or ash (ceramic glaze). This brings up two questions:
1. in future forts, what would be the best storage material other than wood? Assuming that I have easy access to magma to power forges and kilns, do stone, metal, green glass, or clay-based pots have any drawbacks? Are they much heavier and therefore slow down my haulers? Does the weight of an alcohol container affect how long it takes a dwarf to drink from it?
2. is there any way to burn existing bins and barrels down to ash? I'm practically drowning in tetrahedrite, so replacing the existing stock with copper pots and bins would be easy. It would save me a lot of time (and wounded pride for not going the metal route in the first place) to avoid waiting on underground tree farms to reach maturity and instead 'reclaim' the wood in bins and barrels by making it into ash products. I'm not philosophically opposed to modding in a new reaction or workshop if that's what's required.