Use 'handle' function to prune herbs.
Since 'handle' has so few uses, I thought it would be nice to make it work with herbs - when you handle a herb on your tile, the game would prompt "Do you wish to destroy/remove/prune this herb?"
If answered yes, it will remove the herb entirely and consume a single turn (you literally grab the whole herb bush and pull it out of the ground).
This would improve the game for characters with high herbalism skill which makes it difficult to stabilize herb patches before the next generation appears and the pattern changes to something unfavorable.
It also expands an otherwise underused game feature.
Currently characters with fire magic have it easy because burning hands for example works exactly the same way when applied to herbs.
However only a select few characters have the access or ability to cast mentioned spell.
Wands/bolts of fire/acid/lightning also work but it kind of feels like an overkill - using a powerful offensive spell against one tiny herb?
Just 'handle' it out of the ground.