After you deposit your tokens they are vested for the time mentioned (1, 3, or 12 months). During this period it won't be possible to withdraw your deposit.
You are still able to harvest your rewards at anytime.
If you stake additional tokens the vesting time will be applied to the whole deposit and will be restarted.
What farms are available?
The first farms available on launch were LIQ single token, with choice of 1, 3, 6 or 12 month vesting.
There are now a whole host of farms available, from single token to LP's.
All details of farm availability, vesting periods and APY's can be found below: