It would be greatly beneficial for those Glitches interested in all aspects of gardening to be able to acquire a better standard of house with herb gardens, whether this comes in the form of 50k housing with 28 herb plots, or possibly adding some more 50k houses with a 14/14 split of crop/herb would satisfy those urges, or maybe a less even split (20/8? 18/10?).
It currently seems unfair that to have a herb garden at all you must settle for fewer trees to work with, along with a smaller storage cupboard etc.
Another possible solution to this would be to add entirely new functionality for crop/herb plots, some complex gardening / botanical procedure which swaps one for the other, allowing people to customise their housing wants, much as they can with the removal and planting of new trees.