| Level | Constr. Level Req. | Harvest Level Req. | Woodcut Level Req. | Size | Lumber Req. | Acorns Req. |
| 1 | 0–23 | 15 | 5 | Small Beginner | 1000 | 50 |
| 2 | 24–26 | 15 | 5 | Medium Beginner | 2000 | 100 |
| 3 | 24–26 | 35 | 20 | Small Normal | 1000 | 50 |
| 4 | 36 | 15 | 5 | Large Beginner | 4000 | 200 |
| 5 | 36 | 35 | 20 | Medium Normal | 2000 | 100 |
| 6 | 36 | 55 | 50 | Small Advanced | 1000 | 50 |
| 7 | 48 | 35 | 20 | Large Normal | 4000 | 200 |
| 8 | 48 | 55 | 50 | Medium Advanced | 2000 | 100 |
| 9 | 60 | 55 | 50 | Large Advanced | 4000 | 200 |
(Construction levels are not completely established.
24–26 means the requirement is at least 24 but 26 at most.)
Our medium normal forest had 34,942 trees left when ready
large beginner forest had ~95,000 trees when ready
Medium Advanced forest had about 26,141 trees
Medium Normal forest = The forest has about 30,820 trees left.
Large Normal forest had about 75K trees left when it was ready.
From mskwik:
Yes they do require a well, bigger will use water faster during the grow period, if the well runs dry it stops growing/grows backward. Normal ETA once planting is complete is around 6 months, maybe 5000 water for a large forest, plan accordingly.
Wood from each type roughly corresponds to what you would get from a similar level public forest.
I put the acorns down as required when doing the building so it's clear how many are needed up front, the planting period doesn't require any other materials.
Like the well it will eventually run out of trees and need to be replanted.
Enough that once you chop them all you should end up with somewhat more than half the acorns needed for another forest of the same size (acorn drop rates are about the same there as the public spots)
-It took me 4001 timer cycles to plant a Large Advanced Guild Forest – The Dude
