Yellow Giant Hyssop Agastache nepetoides
Tall, mint family perennial (4-6 ft) with smooth, square stems, large hairy leaves, and upright, dense spikes of tiny, pale greenish-yellow flowers that bloom in late summer, attracting many pollinators like bees and butterflies with its nectar. It features understated, creamy blooms on tall spikes that can reach up to 16 inches, offering a vital late-season food source, and its bitter foliage makes it deer-resistant, thriving in sun to part shade with moist, rich soil. 
 
Appearance:
Height: Grows 4 to 6 feet tall, sometimes taller.
Stems: Smooth, distinctly square, often with winged angles.
Leaves: Large, ovate (egg-shaped) with toothed edges, hairy (pubescent) underneath.
Flowers: Small, pale greenish-yellow to creamy-white, densely packed in long, cylindrical spikes (up to 8-16 inches) at stem tips.
Overall: Resembles an ear of corn or wheat
 
Key Characteristics:
Bloom Time: Late July to early September, sometimes into October.
Pollinator Magnet: Nectar-rich, highly attractive to honeybees, bumblebees, butterflies, and wasps.
Deer Resistant: Bitter foliage deters deer.
Habitat: Prefers moist to average soils in full sun to part shade, often found in woodland edges, meadows, and thickets.