Trees are an NFT trait that kinda dosent mean anything much anymore.
Trees NFT trait could be a trait for orchards with figs, apples, oranges e.t.c. that can be hosted on lands with that nft trait only. They should be independent from industry limits, as the other nft traits.
There could be a mechanic over them, that only owners can plant the tree seed, and water it once per day, so the tree keeps being productive for other players :)