How to pressure can sweet potatoes with honey. Note these will come out soft.
But, before filling each jar, add some honey. ( tablespoon for half-litre / US pint jars; 2 tablespoons for 1 litre / US quart jars).
To be clear, the honey has 0 preservative effect: it's for flavour only. Following the proper USDA pressure canning procedure provides the preservative effect.