T - Tansy, Tulip, and Thyme
Bumblebees can't keep away from purple tansy! They are so distracted you can actually lightly pet them on their fuzzy backs. I love the curled flower heads. Purple tansy is a very easy to grow annual.
Some gardens have a plethora of tulips, in a rainbow of colors. Not me. I'm not fond of tulips.
All the thymes are pollinator magnets. The Juniper thyme is particularly beautiful. I only use the garden thyme in cooking, or sometimes my lemon thyme, which hasn't flowered for me. Another one with pretty flowers is Foxley, which has variegated leaves.
Left: Garden Thyme
Right: Creeping Thyme