Desert Solstice Hummingbird Mint) has remarkable flower spikes, noted for their fullness, large size, and exotic colorization. A mix of orange and pink calyxes (tubular flowers) give the flower spikes a stunning mauve glow in the late afternoon sun. Agastache Desert Solstice is like a semi-dwarf form of our best selling 'Desert Sunrise' but with more flowers. This perennial plant has excellent cold hardiness and a sweet herbal aroma in the leaves and flowers. Grow it best in poor, fast draining soils with plenty of sunlight and not too much water.