The pine trees providing bark for herbalism share the spawns with many other herbs during spring, including the Hawthorn trees. The pines are so bountiful for both winter and spring, despite being used for possibly one of the least desired potions in the game, whereas the Hawthorns, which are much more direly needed for their flowers, are there for spring only and, more often than not, really hard to find. It'd be awesome if we could have the pines spawn only during winter. It'd more than suffice, since they share spawns with only one other herb. It would at the very least increase the chances of Hawthorne spawns by a little during spring.