This is REALLY neat and seaborn is now officially the best thing since sliced bread (only having pie charts could make it better¹).

seaborn.FacetGrid — seaborn 0.12.2 documentation:

relplot Combine a relational plot and a FacetGrid

displot Combine a distribution plot and a FacetGrid

catplot Combine a categorical plot and a FacetGrid

lmplot Combine a regression plot and a FacetGrid

sns.displot(
	data=df_item[df_item['item.item_category']!="OTHER"].groupby(['item.item_category','time.pull']).sum(),
	#y='item_active', 
	x='items_available',
	hue="item.item_category",
	col="item.item_category",
)

All of this takes row/col arguments that neatly create separate plots!