Not a Shamrock; but definitely an Oxalis, as are shamrocks.
Bergenia cordifolia, sometimes called ‘Pig Squeak’ for the sound the leaves make when you pinch them properly.
Magnolia Virginiana “Moon Bay”. Selection of the sweet Bay Magnolia from the East Coast.
Cyclamen and Fern
Acer negundo “Kelly’s Gold; Box Elder (tri-leaf Maple.)
Not flowers, but important for flowers. We worked all day in a garden several feet from 2 large hives, sometimes in clouds of bees doing young orientation flights. No one was stung, nor was there any green beer.