We can't whip up a batch this afternoon and have them all baked and ready for you in few hours or even in a few days.
Plants take time to grow.
Many can only be propagated at certain times of year. We plan for orders and schedule propagation of the plants. All this takes time, planning, and effort. To do it well takes more than a day's notice. We much prefer and greatly appreciate that orders be placed in the late fall or winter.